Cassini Radio and Plasma Wave Science
RPWS Standard Products
Archive Volume
Software Interface Specification
(RPWS Archive Volume SIS)
IO-AR-019
Version 1.0
March 2004
W. S. Kurth
Department of Physics & Astronomy
The University of Iowa
Iowa City, IA 52242
Cassini Radio and Plasma Wave Science
RPWS Standard Products
Archive Volume
Software Interface Specification
(RPWS Archive Volume SIS)
IO-AR-19
Version 1.0
March
2004
Prepared by:
_______________________________________ ______________
William S. Kurth Date
Cassini RPWS Deputy Principal Investigator
Approved:
_______________________________________ ______________
Donald A. Gurnett Date
Cassini RPWS Principal Investigator
_______________________________________ ______________
Diane Conner Date
Cassini Archive Data Engineer
_______________________________________ ______________
Raymond Walker Date
PDS-PPI Node Manager
_______________________________________ ______________
Steve Adams Date
PDS Central Node Data Engineer
Table of Contents
1. Preface . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2. Introduction . . . . . . . . . . . . . . . . . . . . . . . 1
2.1. Content Overview . . . . . . . . . . . . . . . . . 1
2.2. Scope . . . . . . . . . . . . . . . . . . . . . . . 3
2.3. Applicable Documents. . . . . . . . . . . . . . . . 3
2.4. Audience. . . . . . . . . . . . . . . . . . . . . . 3
3. Archive Volume Generation. . . . . . . . . . . . . . . . . 4
3.1. Data Transfer and Validation Methods. . . . . . . . 4
3.2. Data Product Sizes and Delivery Dates . . . . . . . 5
3.3. Media Characteristics . . . . . . . . . . . . . . . 6
3.4. Backup and Duplicates . . . . . . . . . . . . . . . 6
3.5. Labeling and Identification . . . . . . . . . . . . 6
4. Archive Volume Contents. . . . . . . . . . . . . . . . . . 6
4.1. Root Directory Contents . . . . . . . . . . . . . . 6
4.2. INDEX Directory Contents. . . . . . . . . . . . . . 7
4.3. DOCUMENT Directory Contents . . . . . . . . . . . . 7
4.4. CATALOG Directory Contents. . . . . . . . . . . . . 8
4.5. BROWSE Directory Contents and Naming Conventions. . 9
4.5.1. Required Files . . . . . . . . . . . . . . . 9
4.5.2. BROWSE/RPWS_KEY_PARAMETERS Directory Contenst10
4.5.3. BROWSE/RPWS_LOW_RATE_FULL Directory Contents 10
4.5.4. BROWSE/RPWS_WIDEBAND_FULL Directory Contents 10
4.5.5. BROWSE/RPWS_WAVEFORM_FULL Directory Contents 10
4.6. DATA Directory Contents and Naming Conventions . 11
4.6.1. Required Files . . . . . . . . . . . . . . . 11
4.6.2. DATA/RPWS_RAW_COMPLETE Directory Contents. . 11
4.6.3. DATA/RPWS_KEY_PARAMETERS Directory Contents 11
4.6.4. DATA/RPWS_LOW_RATE_FULL Directory Contents 12
4.6.5. DATA/RPWS_WIDEBAND_FULL Directory Contents 12
4.6.6. DATA/RPWS_WAVEFORM_FULL Directory Contents 13
4.6.7. DATA/ANCILLARY Directory Contents. . . . . 14
4.7. EXTRAS Directory Contents . . . . . . . . . . . . 14
5. Archive Volume Format. . . . . . . . . . . . . . . . . . 14
5.1. Disk Format . . . . . . . . . . . . . . . . . . . 14
5.2. File Formats. . . . . . . . . . . . . . . . . . . 14
5.2.1. Document File Format . . . . . . . . . . . 14
5.2.2. Tabular File Format. . . . . . . . . . . . 15
5.2.3. PDS Label Format . . . . . . . . . . . . . . 15
5.2.4. Catalog File Format. . . . . . . . . . . . 16
5.2.5. Index File Format. . . . . . . . . . . . . 16
5.2.6. Science Data File Formats. . . . . . . . . 17
5.2.6.1. RPWS_KEY_PARAMETERS_BROWSE Data Product
Format. . . . . . . . . . . . . . . 17
5.2.6.2. RPWS_KEY_PARAMETERS Data Product Format 17
5.2.6.3. RPWS_RAW_COMPLETE Data Product Format 17
5.2.6.4. RPWS_LOW_RATE_BROWSE Data Product Format 17
5.2.6.5. RPWS_LOW_RATE_FULL Data Product Format 17
5.2.6.6. RPWS_WIDEBAND_BROWSE Data Product Format 18
5.2.6.7. RPWS_WIDEBAND_FULL Data Product Format 18
5.2.6.8. RPWS_WAVEFORM_BROWSE Data Product Format 18
5.2.6.9. RPWS_WAVEFORM_FULL Data Product Format 18
6. Support Staff and Cognizant Persons. . . . . . . . . . . . 19
Appendix A. Directory Structure . . . . . . . . . . . . . . . 20
Appendix B. Sample Labels for RPWS_KEY_PARAMETERS . . . . . . 22
Appendix C. Sample Labels for RPWS_RAW_COMPLETE . . . . . . . 30
Appendix D. Sample Labels for RPWS_LOW_RATE_FULL. . . . . . . 39
Appendix E. Sample Labels for RPWS_WIDEBAND_FULL. . . . . . . 51
Appendix F. Sample Labels for RPWS_WAVEFORM_FULL. . . . . . . 67
Appendix G. Sample Index Labels . . . . . . . . . . . . . . . 76
Appendix H. Sample Ancillary Files. . . . . . . . . . . . . . 79
Appendix I. Acronym list. . . . . . . . . . . . . . . . . . . 82
1. Preface
This document describes the format and content of the CAS RPWS Standard
Products Archive Collection on DVD-R media.
2. Introduction
2.1 Content Overview
The Cassini Radio and Plasma Wave Science (RPWS) instrument is a
collection of sensors and receivers on the Cassini Orbiter that acquire
plasma wave, radio wave, thermal plasma, and dust data that address
several of the primary Cassini objectives for studies of the Saturnian
system and certain targets of opportunity during the cruise to Saturn
(including Venus, Earth, Jupiter, and the solar wind). This software
interface specification (SIS) covers only the required archive data
products including CODMAC Level 2 and/or 3 (NASA Level 1A and/or 1B) data
sets. The RPWS team anticipates archiving some higher level products as
resources permit; these will be specified in a separate SIS or a future
revision to this one.
Table 1. Data Products included in this document:
Standard Data Product ID
Data Set ID
RPWS_KEY_PARAMETERS_BROWSE
RPWS_KEY_PARAMETERS
CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0
RPWS_RAW_COMPLETE
CO-V/E/J/S/SS-RPWS-2-REFDR-ALL-V1.0
RPWS_LOW_RATE_BROWSE
RPWS_RPWS_LOW_RATE_FULL
CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0
RPWS_WIDEBAND_BROWSE
RPWS_WIDEBAND_FULL
CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0
RPWS_WAVEFORM_BROWSE
RPWS_WAVEFORM_FULL
CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0
The following provide brief summaries of the data sets listed in Table 1:
Key Parameters Browse (RPWS_KEY_PARAMETERS_BROWSE) consists of Portable
Network Graphics (PNG) frequency-time spectrogram images of the Key
Parameters data set and serves as a guide to the spectral information in
the Key Parameters data set.
Key Parameters (RPWS_KEY_PARAMETERS) is a data set which contains a
summary of the RPWS spectral information as a function of time with
parameters which have been agreed to between RPWS and other
Magnetosphere and Plasma Science (MAPS) instruments as being suitable for
the RPWS contribution to the MAPS Key Parameter Data Set. This parameter
set is in the form of an ASCII flat file including the amplitude
(electric and magnetic field spectral densities) of waves in 10
logarithmically-spaced frequency bands per decade with 1-minute temporal
resolution and is generated by averaging full resolution measurements
falling within the frequency and time bins.
Raw Complete (RPWS_RAW_COMPLETE) consists of decompressed and edited
telemetry packets including all telemetry data from the RPWS. These data
are included in the archive to preserve the original telemetry data, but
are not expected to be used for any but exceptional circumstances. We
expect the Low Rate Browse and other Standard data products to include
all of the RPWS data in a much more accessible form. As such, the Raw
Complete data set will be accompanied only by minimal PDS labels and with
documentation, included, which provides information on how to read and
use this data set. The Low Rate Browse data serves as a guide to the data
included in this data set.
Low Rate Browse (RPWS_LOW_RATE_BROWSE) consists of Portable Network
Graphics (PNG) frequency-time spectrogram images of the Low Rate Full
Resolution Calibrated data set.
Low Rate Full Resolution Calibrated (RPWS_LOW_RATE_FULL) is a data set
including all spectral density measurements acquired by the RPWS in units
of electric or magnetic field spectral density.
Wideband Browse (RPWS_WIDEBAND_BROWSE) consists of Portable Network
Graphics (PNG) frequency-time spectrogram images of the wideband
observations acquired by the RPWS. Subsets of this data set will include
data in the 10- and 80-kHz wideband receiver data (baseband) and
high-frequency wideband receiver data acquired via frequency translation
through the High Frequency Receiver from frequencies between 125 kHz and
16 MHz.
Wideband Full Resolution Uncalibrated (RPWS_WIDEBAND_FULL) data are the
full resolution waveform data from the RPWS Wideband Receiver in
uncalibrated form. This data set will include procedures, code examples,
and the necessary information to derive calibrated electric or magnetic
fields from the uncalibrated data.
Waveform Browse (RPWS_WAVEFORM_BROWSE) data are of Portable Network
Graphics (PNG) frequency-time spectrogram images of the 5-Channel
Waveform Receiver observations acquired by the RPWS.
Waveform Full Resolution Uncalibrated (RPWS_WAVEFORM_FULL) data are the
full resolution waveform data from the RPWS Wideband Receiver in
uncalibrated form. This data set will include procedures, code examples,
and the necessary information to derive calibrated electric and magnetic
field spectral densities from the uncalibrated data.
More information on these data sets can be found in the sample data set
information templates in Appendices B - E.
This software interface specification describes the format, content, and
generation of the Cassini RPWS Standard Product Archive Volumes. Section
3, Archive Volume Generation, describes the procedure for transferring
data products to the archive media. Section 4, Archive Volume Contents,
describes the structure of the archive volumes and the contents of each
file. Section 5, Archive Volume Format, describes the file formats used
on the archive volumes. Finally, Section 6, Support Staff and Cognizant
Persons, lists the individuals responsible for generating the archive
volumes.
2.2 Scope
The specifications in this document apply to all Cassini RPWS standard
product archive volumes that are produced on DVD-R media for the Cassini
cruise and tour.
2.3 Applicable Documents
1. Cassini Program Data Management Plan, April 1999, JPL D-12560, Rev B.
2. Cassini/Huygens Program Archive Plan for Science Data, August 3, 2000,
JPL D-15976, Version 1.
3. D. A., Gurnett, W. S. Kurth, D. L. Kirchner, G. B. Hospodarsky, T. F.
Averkamp, P. Zarka, A. Lecacheux, R. Manning, A. Roux, P. Canu, N.
Cornilleau-Wehrlin, P. Galopeau, A. Meyer, R. Bostrom, G. Gustafsson,
J.-E. Wahlund, L. Aahlen, H. O. Rucker, H. P. Ladreiter, W. Macher, L.
J. C. Woolliscroft, H. Alleyne, M. L. Kaiser, M. D. Desch, W. M. Farrell,
C. C. Harvey, P. Louarn, P. J. Kellogg, K. Goetz, and A. Pedersen, The
Cassini Radio and Plasma Wave Science Investigation, Space Sci. Rev., in
press, 2003.
4. Planetary Science Data Dictionary Document, August 28, 2002, Planetary
Data System, JPL D-7116, Rev. E.
5. Planetary Data System Data Preparation Workbook, February, 1995,
Version 3.1, JPL D- 7669, Part 1.
6. Planetary Data System Standards Reference, October 15, 2002, Version
3.5. JPL D07669, Part 2.
2.4 Audience
This specification is useful to those who wish to understand the format
and content of the Cassini RPWS Standard Product Archive Collection.
Typically, these individuals would be software engineers, data analysts,
or planetary scientists.
3. Archive Volume Generation
3.1 Data Transfer and Validation Methods
The Cassini RPWS Standard Product Archive Collection is produced by the
Cassini RPWS investigation team centered at The University of Iowa with
other sites including Goddard Space Flight Center; the University of
Minnesota; the Observatoire de Paris in Meudon, France; CETP in Velizy,
France; University of Sheffield, Sheffield, UK; Swedish Institute of
Space Physics, Uppsala, Sweden; the Academy of Sciences in Sweden; and
University of Oslo, Oslo, Norway. The archiving activity is carried out
in cooperation with the PDS Planetary Plasma Interactions (PPI) Node at
the University of California, Los Angeles and the Outer Planets subnode
of the PPI at The University of Iowa. The Cassini archiving is funded by
the Cassini project through a contract between The University of Iowa and
the Jet Propulsion Laboratory. The PPI activities are funded by the
Planetary Data System.
The Archive Collection will include data acquired during the Cassini
cruise to Saturn, including the two Venus flybys, the Earth and Jupiter
flybys, and interplanetary cruise as well as data acquired during the
prime mission in Saturn orbit. The archive validation procedure
described in this section applies to volumes generated during all phases
of the mission. At least the first two or possibly three data volumes
will be validated in detail via the PDS peer review procedure, but it is
anticipated that once any issues raised by that peer review are resolved,
subsequent volumes will be validated as to format and content by the PPI
node and for scientific integrity and completeness through the use of the
data by the RPWS science team and others.
A single archive volume set of Cassini RPWS data is produced for the
entire Cassini mission. When sufficient data for a new archive volume
are ready for validation, the RPWS team will deliver a DVD-R volume with
the data to the PPI Node of the PDS. The volume will include PDS
documentation (label) files and ancillary products (index tables, HTML
access files, etc.). Each volume of standard products, documentation,
and ancillary products is stored on a recordable digital versatile disk
(DVD-R) generated by the RPWS team. All data formats are based on the
Planetary Data System standards as documented in the PDS Standards
Reference [section 2.3-6, Applicable Documents].
The RPWS Team will produce three copies of each DVD-R. One will be sent
to the PPI node at UCLA, one to the PDS Central Node at JPL, and the
third copy will be kept at The University of Iowa. These three copies
are used for validation at The University of Iowa, PPI, and the Central
Node. Upon successful validation of a volume, the data are considered
released to the PDS. The PDS-PPI is then responsible for duplicating the
approved volume as PDS requires for both distribution and the deep
archive at NSSDC.
Distribution of the RPWS standard product archive volumes is the
responsibility of the PDS. The PPI maintains a mailing list of
scientists interested in receiving these data. Users can add or remove
themselves from the Cassini RPWS distribution list through a web page
maintained at the PPI. The NSSDC may choose to order (and pay for)
additional copies at the time PDS generates them or orders copies from a
vendor. The NSSDC and the PDS are each separately responsible for making
additional future copies to meet the needs of their user communities.
In the event that a volume is found to contain errors, the reviewers can
recommend one of two courses of action: fix the disk or publish as is
with a note in the ERRATA.TXT file. If the errors are minor, typically
minor errors in the documentation, the volume can be published if the
appropriate notes are added to the volume's errata file and the error(s)
are corrected on subsequent volumes. If the errors are major, typically
involving errors in the data themselves, then the volume must be
corrected, re-generated, and sent back out for review.
3.2. Data Product Sizes and Delivery Dates
Table 2 summarizes sizes and delivery rates for the Cassini RPWS Standard
Products. It should be noted that the Cassini/Huygens Program Archive
Plan for Science Data specifies the schedule for archive product
delivery. Essentially, all cruise and approach products up until SOI are
due on 1 July 2005 and subsequent tour data will be delivered in
three-month increments every quarter.
Table 2: RPWS Standard Product Sizes and Delivery Rates
Standard Data Product ID
Product Size
(cruise/tour)
Production
Rate
(cruise/tour)
Time to Fill
one 4.5 Gbyte
Volume
(cruise/tour)
Volumes for
Mission
(cruise/tour)
RPWS_KEY_PARAMETERS_BROWSE
150 kB/150 kB
1/day / 1/day
RPWS_KEY_PARAMETERS
150 kB/150 kB
1/day / 1/day
RPWS_RAW_COMPLETE
var (20 MB)
1/hr / 1/hr
RPWS_LOW_RATE_BROWSE
150 kB/150 kB
1/day / 1/day
RPWS_LOW_RATE_FULL
3 MB/15 MB
1/hr / 1/hr
RPWS_WIDEBAND_BROWSE
150 kB/150 kB
1/day / 1/hr
RPWS_WIDEBAND_FULL
var (10 MB)
var / 1/hr
RPWS_WAVEFORM_BROWSE
n/a / 150 kB
n/a / 1/day
RPWS_WAVEFORM_FULL
n/a / 15 MB
n/a / 1/day
Totals
2 mo / 1 mo
24 / 48
The current plan is for each RPWS Standard Product Archive Volume to
contain at most ~4.7 Gbytes of data, including documentation and
ancillary files, based on the storage capacity of DVD-R media. Some
volumes may be under-filled to keep the time intervals covered by a given
volume at reasonable sizes and to cover standard intervals (e.g. 1 year
or 1 month). We anticipate including all of the data types in Tables 1
and 2 for a given interval on the same volume.
According to the archive schedule, we estimate approximately 4 DVD-R
volumes will encompass the cruise phase and be delivered by 1 July 2005.
We anticipate delivering approximately 3 DVD-Rs per quarter, thereafter.
The most recent data in a delivery will be approximately 1 year old, the
time required to generate and validate the delivered data.
3.3 Interface Media Characteristics
All DVD volumes in the Cassini RPWS Standard Product Archive Collection
will conform to the Digital Versatile Disk UDF-ISO Bridge format (with
ISO-9660 level 2 compatibility).
3.4 Backup and Duplicates
UCLA keeps three copies of each DVD-R volume. One volume is the archive
copy and is placed in an on-line drive at UCLA in order to make the data
web accessible. The second copy is a backup that can be used if a DVD-R
becomes lost or damaged. The third copy is a copy to be kept offsite from
UCLA. UCLA will make copies of the one DVD-R provided by the University
of Iowa to fulfill these needs. Another copy is sent to the NSSDC. The
University of Iowa will keep at least one copy of each DVD-R.
3.5 Labeling and Identification
Each Cassini RPWS DVD-R bears a volume ID using the last two components
of the volume set ID [PDS Standards Reference, 2002]. The RPWS volume
set is comprised of one sequence of volumes with the volume set ID of
USA_NASA_PDS_CORPWS_0nnn. The RPWS volumes will be members of the
MISSION TO SATURN volume series.
4. Archive Volume Contents
This section describes the contents of the Cassini RPWS Standard Product
Archive Collection volumes, including the file names, file contents, and
file types. RPWS team members are responsible for providing all the files
except where otherwise noted. The complete directory structure is shown
in Appendix A. All the ancillary files described herein appear on each
RPWS volume, except where noted.
4.1 Root Directory Contents
The following files are contained in the Root Directory.
File Name File Contents
AAREADME.TXT This file completely describes the volume organization and
contents (PDS label attached).
AAREADME.HTM Hypertext version of AAREADME.TXT
AAREADME.LBL A PDS detached label that describes AAREADME.HTM
ERRATA.TXT A cumulative listing of comments and updates concerning
all RPWS Standard Data Products on all RPWS digital
versatile disk volumes in the volume set published so far.
VOLDESC.CAT A description of the contents of this volume in a PDS
format readable by both humans and machines.
4.2 INDEX Directory Contents
The following files are contained in the Index Directory.
File Name File Contents
INDXINFO.TXT A description of the contents of this directory
CUMINDEX.TAB A table listing all RPWS products published so far in this
volume set, including the data on this volume.
CUMINDEX.LBL A PDS detached label that describes CUMINDEX.TAB
INDEX.TAB A table listing all RPWS products on this volume
INDEX.LBL A PDS detached label that describes INDEX.TAB
4.3 DOCUMENT Directory Contents
The following files are contained in the Document Directory.
File Name File Contents
DOCINFO.TXT A description of the contents of this directory
VOLSIS.HTM The Archive Volume SIS (this document) as hypertext
VOLSIS.TXT The Archive Volume SIS (this document) in ASCII format
VOLSIS.PDF The Archive Volume SIS (this document) in Adobe Acrobat
format
VOLSIS.WPD The Archive Volume SIS (this document) in Wordperfect format
VOLSIS.LBL A PDS detached label that describes the HTM, WPD, and PDF
versions of the VOLSIS document.
RPWSINST.HTM A description of the RPWS instrument based on the Space
Science Reviews article listed in section 2.3, Applicable
Documents in hypertext format.
RPWSINST.WPD A description of the RPWS instrument based on the Space
Science Reviews article listed in section 2.3, Applicable
Documents in Wordperfect format.
RPWSINST.PDF A description of the RPWS instrument based on the Space
Science Reviews article listed in section 2.3, Applicable
Documents in Acrobat format.
RPWSINST.LBL A PDS detached label that describes the HTM, WPD, and PDF
versions of the RPWSINST document.
RPWSUG.HTM RPWS Flight Software User's Guide in hypertext format
RPWSUG.PDF RPWS Flight Software User's Guide in Acrobat format
RPWSUG.SXW RPWS Flight Software User's Guide in StarOffice format
RPWSUG.LBL A PDS detached label that describes the HTM, PDF, and SXW
versions of the RPWSUG document.
RPWSCAL.HTM A description of the RPWS calibration process, calibration
parameters and related information in hypertext format.
RPWSCAL.PDF A description of the RPWS calibration process, calibration
parameters and related information in Acrobat format.
RPWSCAL.WPD A description of the RPWS calibration process, calibration
parameters and related information in Wordperfect format.
RPWSCAL.LBL A PDS detached label that describes the HTM, PDF, and WPD
versions of the RPWSCAL document.
WBRWFR.TXT Information on accessing and calibrating WBR and WFR data.
4.4 CATALOG Directory Contents
The following files are contained in the Catalog Directory.
File Name File Contents
CATINFO.TXT A description of the contents of this directory
KEYDS.CAT PDS data set catalog description of the Key Parameter data
set
RAWDS.CAT PDS data st catalog description of the Raw Complete data
set.
LRFULLDS.CAT PDS data set catalog description of the Low Rate Full data
set
WBFULLDS.CAT PDS data set catalog description of the Wideband Full data
set
WFFULLDS.CAT PDS data set catalog description of the Waveform Full data
set
CO_HOST.CAT PDS instrument host (spacecraft) catalog description of
the Cassini Orbiter spacecraft (To be provided by the
Cassini Project).
RPWSINST.CAT PDS instrument catalog description of the RPWS instrument.
MISSION.CAT PDS mission catalog description of the Cassini mission (To
be provided by the Cassini Project).
PERSON.CAT PDS personnel catalog description of RPWS Team members and
PPI Node members involved with the generation of the RPWS
data products.
REF.CAT RPWS-related references mentioned in other *.CAT files.
(To be provided by the Cassini Project).
4.5 BROWSE Directory Contents and Naming Conventions
The Browse directory contains frequency-time spectrogram images of the
full-resolution numerical data for the Key Parameters, Low Rate,
Wideband, and Waveform data sets and ancillary information files produced
by the RPWS team. The image files, in Portable Network Graphics (PNG)
format, from the various data sets are stored in separate subdirectories
on the main data directory.
4.5.1 Required Files
In the BROWSE directory there is a file named BROWINFO.TXT that is an
ASCII text description of the contents of the directory and its
subdirectories. Text documentation files will have attached PDS labels.
One detached PDS label file will describe all of the image files in the
BROWSE directory and its subdirectories, and has the suffix ".LBL".
4.5.2 BROWSE/RPWS_KEY_PARAMETERS Directory Contents
Low Rate Browse (RPWS_KEY_PARAMETERS_BROWSE) consists of Portable Network
Graphics (PNG) frequency-time spectrogram images of the low rate key
parameter spectral information observed by the RPWS. There will be two
image files for each day for which data exists. One will include the
electric field spectrogram and the other will include the magnetic field
spectrogram. File names will be of the form Tyyyyddd_E_KPB.PNG and
Tyyyyddd_B_KPB.PNG where yyyyddd is the date of the data.
4.5.3 BROWSE/RPWS_LOW_RATE_FULL Directory Contents
Low Rate Browse (RPWS_LOW_RATE_BROWSE) consists of Portable Network
Graphics (PNG) frequency-time spectrogram images of the low rate spectral
information observed by the RPWS. There will be two image files for each
day for which data exists. One will include the electric field
spectrogram and the other will include the magnetic field spectrogram.
File names will be of the form Tyyyyddd_E_LRB.PNG and Tyyyyddd_B_LRB.PNG
where yyyyddd is the date of the data.
4.5.4 BROWSE/RPWS_WIDEBAND_FULL Directory Contents
Wideband Browse (RPWS_WIDEBAND_BROWSE) consists of Portable Network
Graphics (PNG) frequency-time spectrogram images of the wideband
observations acquired by the RPWS. Subsets of this data set will include
data in the 10- and 80-kHz wideband receiver data (baseband) and
high-frequency wideband receiver data acquired via frequency translation
through the High Frequency Receiver from frequencies between 125 kHz and
16 MHz. Since these data are typically acquired for brief intervals with
long time intervals in between, there will be one file for each
acquisition interval. File names will be of the form
Tyyyyddd_hhmm_xxxKHZ_WBRFR.PNG where yyyyddd_hhmm is the starting date
and time of the included data and xxx refers to the analysis band such as
10K, 75K, 125K, 8025K. The 10-kHz and 75-kHz files will be segregated
into separate directories. The frequency-translated data will be in
another separate directory, although this directory will include any
analysis band other than 10- or 75-kHz.
4.5.5 BROWSE/RPWS_WAVEFORM_FULL Directory Contents
Waveform Browse (RPWS_WAVEFORM_BROWSE) data are of Portable Network
Graphics (PNG) frequency-time spectrogram images of the 5-Channel
Waveform Receiver observations acquired by the RPWS. There will be one
file per day for each analysis bandwidth (26 Hz or 2.5 kHz). File names
will be of the form Tyyyyddd_26HZ_WFRFR.PNG or Tyyyyddd_2_5KHZ_WFRFR.PNG
where yyyyddd is the date of the data.
4.6 DATA Directory Contents and Naming Conventions
The Data directory contains the actual data products and ancillary
information files produced by the RPWS team. The data files from the
various data sets are stored in separate subdirectories on the main data
directory.
4.6.1 Required Files
The DATA directory contains a description of the contents of all of the
subdirectories in a file called DATAINFO.TXT. Text documentation files
will have attached PDS labels and data files will have detached labels.
Detached PDS label files have the same root name as the file they
describe, but have the suffix ".LBL". In directories where there are
multiple files with the same internal table structure, the table column
description is included in a single format file (.FMT) that is referenced
by a pointer within the PDS label files. This prevents the needless
repetition of information that is not changing within the PDS label
files. In directories where uncalibrated data are provided, files
required for calibrating the data are included (.CAL).
4.6.2 DATA/RPWS_RAW_COMPLETE Directory Contents
Raw Complete (RPWS_RAW_COMPLETE) is a data set which includes all RPWS
telemetry data in a reformatted telemetry packet form. Since much of the
RPWS data is compressed on the spacecraft, this data set includes
uncompressed data so that a user would not have to determine how to
correctly uncompress several different types of data using different
compression schemes. Also, since the RPWS telemetry packets include a
secondary level of organization we refer to as minipackets (an RPWS
minipacket includes telemetry from a single RPWS receiver for a given
interval of time, usually a measurement cycle), and since the minipackets
can be segmented - split across original telemetry packets, we have
unsegmented these and made sure that all the data for a given minipacket
is in one cohesive structure. Because of these simplifications, the
reformatted telemetry packets are not fixed length and are not
well-suited to description by PDS labeling standards. Also, since all of
these data are archived in either calibrated or at least further
reformatted into fixed-length records with standard PDS labeling
elsewhere, we have included only minimal PDS labels for these records.
Documentation (the RPWS Software Users Guide) included in the DOCUMENT
directory provide information on how to extract and use data from this
data set, should that extraordinary circumstance arise. There will be
one file per hour (for hours during which data exist with file names of
the form Tyyyyddd_hh_RAW.PKT where yyyyddd_hh is the year and day of year
of the data and hh is the hour of the day of the data.
4.6.3 DATA/RPWS_KEY_PARAMETERS Directory Contents
Key Parameters (RPWS_KEY_PARAMETERS) is a data set which contains a
summary of the RPWS spectral information as a function of time with
parameters which have been agreed to between RPWS and other MAPS
instruments as being suitable for the RPWS contribution to the MAPS Key
Parameter Data Set. This parameter set is in the form of an ASCII flat
file including the amplitude (electric and magnetic field spectral
densities) of waves in 10 logarithmically- spaced frequency bands per
decade of frequency with 1-minute temporal resolution and is generated by
averaging full resolution measurements falling within the frequency and
time bins. There will be one file per day for days when data exist.
File names will be of the form RPWS_KEY__yyyyddd_v.TAB where yyyyddd is
the date of the data and v is the version. Note that this version
represents the number of times the file has been written and is not to be
confused with the PDS product version or data set version.
4.6.4 DATA/RPWS_LOW_RATE_FULL Directory Contents
Low Rate Full Resolution Calibrated (RPWS_LOW_RATE_FULL) is a data set
including all spectral density measurements acquired by the RPWS in units
of electric or magnetic field spectral density. For days when data
exist, there will be a minimum of 3 files per day. One of these files
will include data from the Low Frequency Receiver (LFR), one will include
data from the Medium Frequency Receiver (MFR), and one will include data
from the High Frequency Receiver (HFR). There may be a fourth file which
includes data from the Medium Frequency Digital Receiver (MFDR). This
last data source is similar to that from the LFR except that is derived
from the 2.5-kHz mode of the waveform receiver and can be used to replace
or supplement the data from the MFR. Each file will contain a binary
table with columns for time (both SCET and SCLK), sensor, and an array of
spectral densities for the set of frequency channels described in the
file header. When mode changes result in a change in this set of
channels, a different file for that receiver will be used. This is most
likely for the HFR, since the HFR has extensive flexibility. File names
will be of the forms
Tyyyyddd_LFRn.DAT,
Tyyyyddd_MFRn.DAT,
Tyyyyddd_HFRn.DAT, and
Tyyyyddd_MFDRn.DAT
for the four types of files described above, respectively. In each,
yyyyddd is the date of the data. For each 'n' is incremented from 0 for
each different set of channel configurations for that receiver.
4.6.5 DATA/RPWS_WIDEBAND_FULL Directory Contents
Wideband Full Resolution Uncalibrated (RPWS_WIDEBAND_FULL) data are the
full resolution waveform data from the RPWS Wideband Receiver in
uncalibrated form. This data set will include procedures, code examples,
and the necessary information to derive calibrated electric or magnetic
field spectral densities from the uncalibrated data. There will be at
least one file for each hour when data exist. Data having different
analysis frequency bands will be in separate files. Further, different
files will be used when the number of samples in a time series is
different within the same hour. This is so each file will have
fixed-length records. File names will be of the forms:
Tyyyyddd_hh_10KHZn_WBRFR.DAT
Tyyyyddd_hh_75KHZn_WBRFR.DAT
Tyyyyddd_hh_xxxKHZn_WBRFR.DAT
where yyyyddd is the date of the data, hh is the hour of the data, and
xxx is the frequency band when frequency translated data are used, such
as 125, 8025, etc. The n differentiates between files with different
record lengths as follows:
n Record Data Length (bytes)
1 1024
2 2048
4 4096
6 6144
8 8192
9 20480
D Dust waveform (1024 bytes)
In addition to the above data lengths, there are 32 bytes of status in
each record.
4.6.6 DATA/RPWS_WAVEFORM_FULL Directory Contents
Waveform Full Resolution Uncalibrated (RPWS_WAVEFORM_FULL) data are the
full resolution waveform data from the RPWS Wideband Receiver in
uncalibrated form. This data set will include procedures, code examples,
and the necessary information to derive calibrated electric and magnetic
field spectral densities from the uncalibrated data. There will be one
file per day for each of the two analysis bandwidths (25 Hz or 2.5kHz).
Different files will be used when the number of samples in the time
series is different, so as to have fixed-length records in the files.
File names will be of the forms
Tyyyyddd_26HZ_WFFRn.DAT and
Tyyyyddd_2_5KHZ_WFFRn.DAT
where yyyyddd is the date of the data. The n differentiates between
files with different record lengths as follows:
n Record Data Length (bytes)
1 1024
2 2048
4 4096
6 6144
8 8192
9 20480
In addition to the above data lengths, there are 32 bytes of status in
each record. Note that in this data set, data from all of the sensors
(whether 1, 2, 3, or 5) are contained in the same file; a parameter in
each record gives the sensor for that particular waveform time series.
4.6.7 DATA/ANCILLARY Directory Contents
The primary contents of this directory will be instrument operation and
sequence information which is useful in finding and using the data in
this archive. For each sequence, there will be an overview TXT file
which will list the set of Instrument Expanded Blocks (IEBs) used in the
sequence and a brief, one line, description of each IEB and a pointer to
a TXT file providing a detailed description of the IEB. For each
sequence there will also be a TAB file containing a set of Spacecraft
Event Time (SCET) time tags, IEB Trigger number or other RPWS command
mnemonic or short description of a series of commands (e.g. a series of
IEB load commands) which can be used to understand which IEB was invoked
at which times.
Note that we assume that the full set of SPICE kernels are being archived
by NAIF; we do not propose to duplicate those archives within the RPWS
archive.
4.7 EXTRAS Directory Contents
This directory contains volume navigation HTML files or other files which
facilitate the use of the volume, but which are not considered part of
the archive, itself.
5. Archive Volume Format
This section describes the format of Cassini RPWS Standard Product
Archive Volumes. Data that comprise the RPWS Standard Product Archives
will be formatted in accordance with Planetary Data System specifications
[Planetary Science Data Dictionary, 2002; PDS Data Preparation Workbook,
1995; PDS Standards Reference, 2002].
5.1 Disk Format
All DVD volumes in the Cassini RPWS Standard Product Archive Collection
will conform to the Digital Versatile Disk UDF-ISO Bridge format (with
ISO-9660 level 2 compatibility).
5.2 File Formats
The following section describes file formats from the kinds of files
contained on archive volumes. For more information, see the PDS Data
Preparation Workbook [1995], Appendix B.
5.2.1 Document File Format
Document files with the .TXT suffix exist in most directories. They are
ASCII files with embedded PDS labels. All TXT document files consist of
variable-length records (lines) terminated with carriage return (ASCII
13) and line feed (ASCII 10) character pairs. This is the standard
Microsoft text file format and can be easily accomodated by MacOS, UNIX,
and other common operating systems.
In general, documents are provided in ASCII text format. However, if the
document contained in the DOCUMENT directory contains formatting and
figures that cannot be rendered as ASCII text, then the document is also
given in hypertext format. The hypertext file contains ASCII text plus
hypertext markup language (HTML) commands that enable it to be viewed in
a web browser such as Netscape or Internet Explorer. Hypertext documents
may reference ancillary files such as images that are incorporated into
the document by the web browser. All image files in this archive will be
in PNG format. Native formats for most documents are also provided, such
as Corel Wordperfect. Adobe Acrobat versions of most documents are also
provided.
5.2.2 Tabular File Format
Tabular files (.TAB extension) exist in the INDEX, RPWS_KEY_PARAMETERS,
and ANCILLARY directories. Tabular files are ASCII files formatted for
direct reading into many database management systems on various
computers. Fields normally are separated by commas or whitespace, and
character fields are enclosed in double quotation marks ("). Character
fields are padded with spaces to keep quotation marks in the same columns
of successive records. Character fields are left justified, and numeric
fields are right justified. The "start byte" and "bytes" values listed in
the labels do not include the commas between fields or the quotation
marks surrounding character fields. The records are of fixed length, and
the last two bytes of each record contain the ASCII carriage return and
line feed characters. This allows a table to be treated as a fixed
length record file on computers that support this file type and as a text
file with embedded line delimiters on those that don't.
All tabular files are described by detached PDS label files. A detached
PDS label file has the same name as the data file it describes, with the
extension .LBL; for example, the file INDEX.TAB is accompanied by the
detached label file INDEX.LBL in the same directory.
5.2.3 PDS Label Format
All data files in the RPWS Standard Product Archive Collection have PDS
labels [Planetary Science Data Dictionary, 2002; PDS Standards Reference,
2002]. These labels all are detached from the data files (same file name
prefix, .LBL suffix).
A PDS label, whether embedded or detached from its associated file,
provides descriptive information about the associated file. The PDS
label is an object-oriented structure consisting of sets of 'keyword =
value' declarations. The object to which the label refers (e.g. IMAGE,
TABLE, etc.) is denoted by a statement of the form:
^object = location
in which the carat character (^, also called a pointer in this context)
indicates where to find the object. In a PDS label, the location denotes
the name of the file containing the object, along with the starting
record or byte number, if there is more than one object in the file. For
example:
^HEADER=("98118.DAT",1)
^TABLE=("98118.DAT",1025 <BYTES>)
indicates that the HEADER object begins at record 1 and that the TABLE
object begins at byte 1025 of the file 98118.DAT. The file 98118.DAT
must be located in the same directory as the detached label file.
Below is a list of the possible formats for the ^object definition in
labels in this product.
^object = n
^object = n <BYTES>
^object = "filename.ext"
^object = ("filename.ext", n)
^object = ("filename.ext", n <BYTES>)
where
n is the starting record or byte number of the object, counting from
the beginning of the file (record 1, byte 1),
<BYTES> indicates that the number given is in units of bytes (the
default is records),
filename is the up-to-27-character, alphanumeric upper-case file
name,
ext is the up-to-3-character upper-case file extension.
All detached labels are ASCII text files with lines terminated with
carriage return (ASCII 13) and line feed (ASCII 10) character pairs.
Some may be padded out with spaces to form 80-byte fixed-length records.
These text formats may be easily read on all common operating systems.
5.2.4 Catalog File Format
Catalog files (suffix .CAT) exist in the Root and Catalog directories.
They are formatted in an object-oriented structure consisting of sets of
'keyword = value' declarations.
5.2.5 Index File Format
The Index file format is an ASCII table containing information about the
data products included in this volume and a cumulative list for the
collection including this volume. It includes information such as the
Volume ID, Product ID, start SCET, path relative to the root of the
volume, data set ID, and RPWS receiver which produces the data. A format
description file for the Index file is given in Appendix G.
5.2.6 Science Data File Formats
5.2.6.1 RPWS_KEY_PARAMETERS_BROWSE Data Product Format
These will be PNG formatted images of frequency-time spectrograms of the
key parameters data with one electric and one magnetic spectrogram per
day for which there are data.
5.2.6.2 RPWS_KEY_PARAMETERS Data Product Format
This is an ASCII flat file table with a time tag followed by averages in
frequency and time for both electric and magnetic field spectral
densities. There are 70 (TBD) electric and 40 (TBD) magnetic channels
and the time resolution is 1-minutes. These characteristics are not
definite until the MAPS working group have concluded their discussion of
the MAPS key parameters. The table will consist of a time (SCET) column
followed by ~ 70 electric field spectral density values and ~40 magnetic
field spectral densities. The record header will define the center
frequencies of these channels. The time will refer to the beginning time
of the averaging interval. A more detailed file format is given in
Appendix B in the RPWSKEY.FMT file. A data quality flag is also
included. If this flag is 0, then the confidence in the data included in
this record is high. If the flag is 1, then there is some question about
the data in the record, and they should be used with caution.
5.2.6.3 RPWS_RAW_COMPLETE Data Product Format
The Raw Complete data files are variable length binary formatted files
with a complex structure including embedded minipackets segregating
telemetry from the various RPWS receivers into separate substructures.
The format is given in the Software Users Guide included in the DOCUMENT
directory.
5.2.6.4 RPWS_LOW_RATE_BROWSE Data Product Format
These will be PNG formatted images of frequency-time spectrograms of the
low-rate survey data with one electric and one magnetic spectrogram per
day for which there are data.
5.2.6.5 RPWS_LOW_RATE_FULL Data Product Format
There will be four different types of files included in this data set as
described in section 4.6.3. Each will be a binary table which has time
columns (SCET and SCLK), a sensor column, and an array of spectral
densities. The header in each file will list the center frequencies of
the channels for which spectral densities are given. Each record will
include a complete set of spectral densities for the set of channels
indicated, with the time being the start time of the data acquisition for
the spectral densities. A detailed file format is given in Appendix D
embedded in the sample RPWS_LOW_RATE_FULL label file.
5.2.6.6 RPWS_WIDEBAND_BROWSE Data Product Format
These will be PNG formatted images of frequency-time spectrograms of the
wideband data. There will be one image for each contiguous set of WBR
observations in a given frequency range (i.e. 10 kHz, 75 kHz, or specific
frequency selection of HF-WBR data).
5.2.6.7 RPWS_WIDEBAND_FULL Data Product Format
This is a binary time series data set. Each record will include time
information (SCET and SCLK, sensor, and gain state (required for
calibration) as well as a time series of waveform measurements. A
detailed description of the file format is in Appendix E in
RPWSWBRFR.FMT.
5.2.6.8 RPWS_WAVEFORM_BROWSE Data Product Format
These will be PNG formatted images of 5-channel frequency-time
spectrograms of the waveform data. There will be one image including all
five channels for each day as long as there is only one set of channels
selected for that day. For days where the channel selections change,
there will be an image for each selected set of channels. For example,
if a particular day has a two- hour interval of delta-n/n observations
from Titan but the rest of the day has the more typical Ex, Ez, Bx, By,
Bz set, then two images will be produced. One will cover the entire day
except for the 2-hour Titan observation and the other will be a two-hour
set of frequency-time spectrograms representing the delta-n/n
observations.
5.2.6.9 RPWS_WAVEFORM_FULL Data Product Format
This is a binary time series data set. Each record will include time
information (SCET and SCLK, sensor, and gain state (required for
calibration) as well as a time series of waveform measurements. A
detailed description of the file format is in Appendix F in
RPWSWFRFR.FMT.
6. Support Staff and Cognizant Persons
Table 3: RPWS Archive Collection Support Staff
Cassini RPWS Team
Dr. Donald A. Gurnett
Dept. Of Physics & Astronomy
The University of Iowa
Iowa City, IA 52242
319-335-1697
donald-gurnett@uiowa.edu
Dr. William S. Kurth
Dept. Of Physics & Astronomy
The University of Iowa
Iowa City, IA 52242
319-335-1926
william-kurth@uiowa.edu
Mr. Larry J. Granroth
Dept. Of Physics & Astronomy
The University of Iowa
Iowa City, IA 52242
319-335-2536
larry-granroth@uiowa.edu
UCLA - PPI
Mr. Steven P. Joy
UCLA-IGPP
405 Hilgard Ave.
Los Angeles, CA 90095-1567
310-826-3506
sjoy@igpp.ucla.edu
Appendix A. Directory Structure
The following directory structure is applicable to each Cassini RPWS
Standard Product Archive Volume. In the cases where all data product
types are not acquired during a given time interval covered by a volume,
the relevant directories will simply be empty except for the INFO.TXT
file. The directories are discussed in detail in the text of this
document, except for EXTRAS, which contains the HTML interface accessible
through AAREADME.HTM.
Root Directory
|
|
---- CATALOG
|
|
---- DOCUMENT
|
|
---- BROWSE
| |
| ---- RPWS-KEY_PARAMETERS
| |
| ---- RPWS_LOW_RATE_FULL
| |
| ---- RPWS_WIDEBAND_FULL
| |
| ---- RPWS_WAVEFORM_FULL
|
---- DATA
| |
| ---- RPWS_KEY_PARAMETERS
| |
| ---- RPWS_RAW_COMPLETE
| |
| ---- RPWS_LOW_RATE_FULL
| |
| ---- RPWS_WIDEBAND_FULL
| |
| ---- RPWS_WAVEFORM_FULL
| |
| ---- ANCILLARY
|
|
|
---- EXTRAS
| |
| |
| ---- SOFTWARE
|
|
---- INDEX
|
|
|
---- LABEL
Appendix B: Sample Labels for RPWS_KEY_PARAMETERS
Data Set Information Catalog File: KEYDS.CAT
PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "
2003-01-12, William Kurth (U. IOWA), initial;
2003-06-26, William Kurth (U. IOWA), general revision;
2004-02-10, William Kurth (U. IOWA), fixed liens;"
RECORD_TYPE = STREAM
OBJECT = DATA_SET
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0"
OBJECT = DATA_SET_INFORMATION
DATA_SET_NAME = "
CASSINI V/E/J/S/SS RPWS SUMMARY KEY PARAMETER 60S V1.0"
DATA_SET_COLLECTION_MEMBER_FLG = "N"
DATA_OBJECT_TYPE = TABLE
ARCHIVE_STATUS = IN_PEER_REVIEW
START_TIME = 1997-298T00:00:00.000Z
STOP_TIME = NULL
DATA_SET_RELEASE_DATE = 2003-06-30
PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"
DETAILED_CATALOG_FLAG = "N"
DATA_SET_TERSE_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) resampled
summary key parameter data set includes summary spectral
information calibrated in units of spectral density for the
entire Cassini mission."
ABSTRACT_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) calibrated
summary key parameter data set includes reduced temporal and
spectral resolution spectral information calibrated in units of
spectral density for the entire Cassini mission. This data set
includes calibrated values binned and averaged within 1 minute by
0.1 decade spectral channels for all times during the mission
including the two Venus flybys, the Earth flyby, the Jupiter
flyby, interplanetary cruise, and the entire Saturn tour. Data
for this data set are acquired by the RPWS Low Frequency Receiver
(LFR), Medium Frequency Receiver (MFR), and High Frequency
Receiver (HFR). Data are presented in a set of
fixed-record-length tables. This data set is intended to provide
numerical summary data which can be used in conjunction with other
Cassini fields and particles key parameter data sets to establish
trends, select events, or simply as a browse data set for the
Cassini RPWS archive. This data set should be among the first
used by a user of any of the RPWS archive as it will lead one to
information required to search for more detailed or highly
specialized products."
CITATION_DESC = "Kurth, W.S., T.F. Averkamp, and
L.J. Granroth, CASSINI V/E/J/S/SS RPWS SUMMARY KEY PARAMETER
60S V1.0, CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0, NASA
Planetary Data System, 2004."
DATA_SET_DESC = "
Data Set Overview
=================
The Cassini Radio and Plasma Wave Science (RPWS) calibrated summary
key parameter data set includes reduced temporal and spectral
resolution spectral information calibrated in units of spectral
density for the entire Cassini mission. This data set includes
calibrated values binned and averaged within 1 minute by 0.1 decade
spectral channels for all times during the mission including the two
Venus flybys, the Earth flyby, the Jupiter flyby, interplanetary
cruise, and the entire Saturn tour. Data for this data set are
acquired by the RPWS Low Frequency Receiver (LFR), Medium Frequency
Receiver (MFR), and High Frequency Receiver (HFR). Data are
presented in a set of fixed-record-length tables. This data set is
intended to provide numerical summary data which can be used in
conjunction with other Cassini fields and particles key parameter
data sets to establish trends, select events, or simply as a browse
data set for the Cassini RPWS archive. This data set should be
among the first used by a user of any of the RPWS archive as it will
lead one to information required to search for more detailed or
highly specialized products.
Parameters
==========
This data set comprises electric and magnetic field spectral
densities for each sensor, binned and averaged (median) into moderate
resolution frequency and time bins. We use 10 spectral channels per
decade logarithmically spaced in frequency, usually from 1 Hz to 16
MHz, and a 1-minute time step.
Processing
==========
Data in this data set were processed by the use of a number of
software programs which assemble segmented mini-packets in the raw
telemetry packets into complete sets, de-compress the data that were
compressed by one of a number of compression algorithms by the RPWS
flight software onboard, apply conversion lookup tables or
algorithms to convert telemetry data numbers into physical units,
make any corrections required for antenna capacitive loading or
other effects, bin the measurements into frequency and time bins,
and then determine the median of all measurements within a bin.
These data are calibrated using the best calibration tables and
algorithms available at the time the data were archived. See
chapters 5 - 11 of the RPWSCAL document in the DOCUMENT directory
for details on how the data included in this data set were
calibrated. Should a significant improvement in calibration become
available, an erratum will be noted in the erratum section. Later
versions of data products may contain better calibrations. It
should be noted, however, that since measurements from different
sensors are binned (via finding the median measurement in the bin)
the resulting spectrum is an amalgamation of different sensors
oriented in different directions. Hence, the detailed
interpretation of this data set is not necessarily straight-
forward. If the user is interested in the best calibrated value
with a minimum of interpretational issues, the Low Rate Full
resolution data product would be the best source of information.
Data
====
The RPWS key parameter data set includes tables of wave spectra as a
function of time using measurements from each of the various
receivers of the RPWS, including the LFR, MFR, and HFR. Each table
will contain fixed-length records including columns for time and
spectral densities for each channel.
Ancillary Data
==============
Ancillary data included with this data set collection include a
series of files that describe the modes of the RPWS as a function of
time and provide a time-ordered listing of Instrument Expanded Block
(IEB) trigger commands (the mode by which the RPWS is reconfigured).
Also a detailed description of each of the modes (or IEBs) is
provided.
Other data which are ancillary to this data set but which are
archived separately from this collection are the Navigation and
Ancillary Information Facility's SPICE kernels describing the
position and attitude of Cassini and various solar system bodies as
a function of time.
Coordinate System
=================
The data in this data set are measurements of wave electric and
magnetic fields measured by the RPWS electric and magnetic sensors.
These fields are presented as detected by the sensors and are not
rotated into any other coordinate system. If desired the SPICE
kernels can be used with the SPICE toolkit to convert from the
spacecraft frame to virtually any frame which may be of use in
analyzing these data. However, for many purposes, the wave
amplitudes are extremely useful and may be entirely adequate with no
coordinate transformations at all.
Software
========
Since the data are provided in text files as fully calibrated
amplitudes, no example software is provided for reading these data.
However, a platform-independent Java (TM) application is provided in
EXTRAS/SOFTWARE/KEY_BROWSE.JAR which can read these data and produce
spectrograms with user-selectable options. See README.TXT in the
same directory for further information.
Media/Format
============
These data are supplied to the Planetary Data System on DVD-R media
using formats and standards of the PDS for such media."
CONFIDENCE_LEVEL_NOTE = "
Confidence Level Overview
=========================
This data set contains all low rate key parameter data for the
Cassini RPWS instrument for the intervals described In the product
label files. Every effort has been made to ensure that all data
returned to JPL from the spacecraft are included and that the
calibration is accurate. A column in each record indicates whether
the confidence in the data in that record is high (0) or not (9).
The middle band of the MFR (Band 2, 180 - 1500 Hz) has shown a
tendency to have an increased noise level by as much as 10 dB at
times, although there is no current explanation for this or
known factor which would enable this condition to be predicted.
In some instrument modes data are collected in the high band of
the WFR which can be used to replace the data in MFR Band 2,
although this replacement has not been done for this data set.
The replacement data are included in the low resolution, fully
calibrated data set, however.
Review
======
The RPWS calibrated summary key parameter data will be reviewed
internally by the Cassini RPWS team prior to release to the PDS.
The data set will also be peer reviewed by the PDS.
Data Coverage and Quality
=========================
All data in the intervals described in the product label files are
included, to the best of our knowledge and attempts to determine
completeness. In general, the instrument was operated only briefly
during early tour for the following intervals:
1. Antenna deployment 1997-10-25T00:00 - 1997-10-26T05:30
2. Venus 1 flyby 1998-04-26T12:54 - 1998-05-08T19:21*
3. Instrument Checkout 1998-12-30T09:10 - 1999-01-19T05:40
4. Venus 2 flyby 1999-06-24T09:08 - 1999-06-24T21:20
5. Earth flyby 1999-08-13T17:39 - 1999-09-14T22:20
*Actual interval for science data is much shorter than this.
Beginning in February of 2000 the instrument was operated
more-or-less continuously; two gaps of the order of six weeks were
incurred for the purposes of loading new attitude control and
command and data system flight software, gaps of a few days each
were incurred approximately twice per year because of Huygens Probe
testing, and gaps of several days in duration occurred during solar
conjunction periods prior to 2002. Remaining gaps are due to
spacecraft anomaly resolution or simply to downlink gaps, some of
which were imposed by limitations on DSN station availability.
Limitations
===========
The only known measurement quality issue is occasional elevated
noise levels (by a few to 10 dB) in the second band of the MFR.
During tour, it is anticipated that data from the Waveform Receiver
(WFR) sometimes referred to as the medium frequency digital receiver
(MFDR) can be substituted for these in the full resolution data
product (RPWS LOW RATE FULL)."
END_OBJECT = DATA_SET_INFORMATION
OBJECT = DATA_SET_TARGET
TARGET_NAME = VENUS
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = EARTH
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = JUPITER
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SATURN
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SOLAR_SYSTEM
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_HOST
INSTRUMENT_HOST_ID = CO
INSTRUMENT_ID = RPWS
END_OBJECT = DATA_SET_HOST
OBJECT = DATA_SET_REFERENCE_INFORMATION
REFERENCE_KEY_ID = "GURNETTETAL2004"
END_OBJECT = DATA_SET_REFERENCE_INFORMATION
END_OBJECT = DATA_SET
END
Sample RPWS_KEY_PARAMETERS Label File
PDS_VERSION_ID = PDS3
DESCRIPTION = "RPWS_KEY__1999230_0 contains Cassini Radio
and Plasma (RPWS) key parameter data for the
time period between 1999-230T00:00:00.000 and
1999-231T00:00:00.000 and includes the
following targets:
EARTH , SOLAR SYSTEM ."
/* pds label for a rpws spectogram */
RECORD_TYPE = FIXED_LENGTH
RECORD_BYTES = 1175
FILE_RECORDS = 1385
/* pointers to start records of objects in file, std ref3.5:5.3.3.2 */
^LRKEY_FREQUENCY_TABLE = ("RPWS_KEY__1999230_0.TAB",1)
^LRKEY_SPECTRAL_DENSITY_TABLE = ("RPWS_KEY__1999230_0.TAB",2)
/* identification data elements - data product labels, std ref3.5:5.3.4.1 */
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0"
PRODUCT_ID = "RPWS_KEY__1999230_0_V1"
PRODUCT_TYPE = DATA
INSTRUMENT_HOST_NAME = "CASSINI ORBITER"
INSTRUMENT_HOST_ID = CO
INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE"
INSTRUMENT_ID = RPWS
MISSION_PHASE_NAME = {"EARTH ENCOUNTER",
"INTERPLANETARY CRUISE",
"VENUS 2 - EARTH CRUISE"}
TARGET_NAME = {"EARTH","SOLAR SYSTEM"}
START_TIME = 1999-230T00:00:00.000
STOP_TIME = 1999-231T00:00:00.000
SPACECRAFT_CLOCK_START_COUNT = "1/1313626007:150"
SPACECRAFT_CLOCK_STOP_COUNT = "1/1313712408:040"
PRODUCT_CREATION_TIME = 2004-03-03
STANDARD_DATA_PRODUCT_ID = RPWS_KEY_PARAMETERS
/* descriptive data elements */
OBJECT = LRKEY_FREQUENCY_TABLE
INTERCHANGE_FORMAT = ASCII
ROW_BYTES = 1175
ROWS = 1
COLUMNS = 3
OBJECT = COLUMN
NAME = BEGIN_TIME
DATA_TYPE = TIME
START_BYTE = 1
BYTES = 21
DESCRIPTION = "Spacecraft Event Time for the beginning of
the day."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = DATA_QUALITY_FLAG
DATA_TYPE = ASCII_INTEGER
START_BYTE = 23
BYTES = 1
DESCRIPTION = "Data quality flag. 0=good & 9=bad."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = FREQUENCY
DATA_TYPE = ASCII_REAL
START_BYTE = 24
BYTES = 1150
ITEMS = 115
ITEM_BYTES = 10
UNIT = "HZ"
DESCRIPTION = "Frequency of the spectral density data."
END_OBJECT = COLUMN
END_OBJECT = LRKEY_FREQUENCY_TABLE
OBJECT = LRKEY_SPECTRAL_DENSITY_TABLE
INTERCHANGE_FORMAT = ASCII
ROW_BYTES = 1175
ROWS = 1384
COLUMNS = 4
OBJECT = COLUMN
NAME = SCET
DATA_TYPE = TIME
START_BYTE = 1
BYTES = 21
DESCRIPTION = "Spacecraft Event Time for the spectral
density measurements. This is the center of
the 1-minute time period within which the
median value of the spectral density for this
time and frequency range was determined."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = DATA_QUALITY_FLAG
DATA_TYPE = ASCII_INTEGER
START_BYTE = 23
BYTES = 1
DESCRIPTION = "Data quality flag. 0=good & 9=bad."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = ELECTRIC_SPECTRAL_DENSITIES
DATA_TYPE = ASCII_REAL
START_BYTE = 24
BYTES = 730
ITEMS = 73
ITEM_BYTES = 10
UNIT = "V**2/M**2/HZ"
DESCRIPTION = "Calibrated spectral densities from the
electric antennas."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = MAGNETIC_SPECTRAL_DENSITIES
DATA_TYPE = ASCII_REAL
START_BYTE = 754
BYTES = 420
ITEMS = 42
ITEM_BYTES = 10
UNIT = "NT**2/HZ"
DESCRIPTION = "Calibrated spectral densities from the
magnetic sensors."
END_OBJECT = COLUMN
END_OBJECT = LRKEY_SPECTRAL_DENSITY_TABLE
END
Appendix C: Sample Labels for RPWS_RAW_COMPLETE
Data Set Information Catalog File: RAWDS.CAT
PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "
2003-06-29, William Kurth (U. IOWA), initial;
2004-02-10, William Kurth (U. IOWA), fixed liens;"
RECORD_TYPE = STREAM
OBJECT = DATA_SET
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-3-REFDR-ALL-V1.0"
OBJECT = DATA_SET_INFORMATION
DATA_SET_NAME = "
CASSINI V/E/J/S/SS RPWS RAW COMPLETE TLM PACKETS V1.0"
DATA_SET_COLLECTION_MEMBER_FLG = "N"
DATA_OBJECT_TYPE = TABLE
ARCHIVE_STATUS = IN_PEER_REVIEW
START_TIME = 1997-298T00:00:00.000Z
STOP_TIME = NULL
DATA_SET_RELEASE_DATE = 2003-06-30
PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"
DETAILED_CATALOG_FLAG = "N"
DATA_SET_TERSE_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) raw complete data
set includes all RPWS telemetry data for the entire Cassini
mission."
ABSTRACT_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) raw complete data
set includes all RPWS telemetry data for the entire Cassini
mission. This data set includes raw telemetry values for each
frequency channel for each sensor for all times during the mission
including the two Venus flybys, the Earth flyby, the Jupiter
flyby, interplanetary cruise, and the entire Saturn tour. Data
for this data set are acquired from the RPWS Low Frequency
Receiver (LFR), Medium Frequency Receiver (MFR), Medium Frequency
Digital Receiver (MFDR) (which can be used to replace MFR band 2
data), High Frequency Receiver (HFR), Sounder, and Langmuir Probe
(LP). Data are decompressed and internal receiver minipackets are
unsegmented. This data set is intended to preserve the telemetry
data and is to be used only as a last resort. Other RPWS archived
data sets are designed to be complete and more easily used.
Browse data sets associated with the other data sets provide a
graphical search of the data included in this data set. This data
set should be the last used by a user of any of the RPWS archive
as it is in the least user-friendly form."
CITATION_DESC = "Kurth, W.S., W.T. Robison, and L.J.
Granroth, CASSINI V/E/J/S/SS RPWS RAW COMPLETE TLM PACKETS V1.0,
CO-V/E/J/S/SS-RPWS-3-REFDR-ALL-V1.0, NASA Planetary Data System,
2004."
DATA_SET_DESC = "
Data Set Overview
=================
The Cassini Radio and Plasma Wave Science (RPWS) raw complete data
set includes all RPWS telemetry data for the entire Cassini mission.
This data set includes raw telemetry values for each frequency
channel for each sensor for all times during the mission including
the two Venus flybys, the Earth flyby, the Jupiter flyby,
interplanetary cruise, and the entire Saturn tour. Data for this
data set are acquired from the RPWS Low Frequency Receiver (LFR),
Medium Frequency Receiver (MFR), Medium Frequency Digital Receiver
(MFDR) (which can be used to replace MFR band 2 data), High
Frequency Receiver (HFR), Sounder, and Langmuir Probe (LP). Data
are decompressed and internal receiver minipackets are unsegmented.
This data set is intended to preserve the telemetry data and is to
be used only as a last resort. Other RPWS archived data sets are
designed to be complete and more easily used. Browse data sets
associated with the other data sets provide a graphical search of
the data included in this data set. This data set should be the
last used by a user of any of the RPWS archive as it is in the least
user-friendly form.
Parameters
==========
This data set includes all measurements from each sensor, frequency
channel, and time step for which data were acquired by the RPWS.
Processing
==========
Data in this data set were processed by the use of a number of
software programs which assemble segmented mini-packets in the raw
telemetry packets into complete sets and de-compress the data that
were compressed by one of a number of compression algorithms by the
RPWS flight software onboard. Information included in the Software
Users Guide included in the DOCUMENT directory on this volume
provides information necessary to extract and use these data.
Data
====
The data included in this data set are the complete set of RPWS
telemetry.
Ancillary Data
==============
Ancillary data included with this data set collection include a
series of files that describe the modes of the RPWS as a function of
time and provide a time- ordered listing of Instrument Expanded
Block (IEB) trigger commands (the mode by which the RPWS is
reconfigured). Also a detailed description of each of the modes (or
IEBs) is provided.
Other data which are ancillary to this data set but which are
archived separately from this collection are the Navigation and
Ancillary Information Facility's SPICE kernels describing the
position and attitude of Cassini and various solar system bodies as
a function of time.
Coordinate System
=================
The data in this data set are measurements of wave electric and
magnetic fields measured by the RPWS electric and magnetic sensors.
These fields are presented as detected by the sensors and are not
rotated into any other coordinate system. If desired the SPICE
kernels can be used with the SPICE toolkit to convert from the
spacecraft frame to virtually any frame which may be of use in
analyzing these data. However, for many purposes, the wave
amplitudes are extremely useful and may be entirely adequate with no
coordinate transformations at all.
Software
========
No software is provided to be used with this data set.
Media/Format
============
These data are supplied to the Planetary Data System on DVD-R media
using formats and standards of the PDS for such media."
CONFIDENCE_LEVEL_NOTE = "
Confidence Level Overview
=========================
This data set contains all the telemetry data for the Cassini RPWS
instrument for the interval described In the label files for the
individual data files. Every effort has been made to ensure that
all data returned to JPL from the spacecraft are included.
Review
======
The RPWS raw complete data will be reviewed internally by the
Cassini RPWS team prior to release to the PDS. The data set will
also be peer reviewed by the PDS.
Data Coverage and Quality
=========================
All data in the stated interval are included, to the best of our
knowledge and attempts to determine completeness. In general, the
instrument was operated only briefly during early tour for the
following intervals:
1. Antenna deployment 1997-10-25T00:00 - 1997-10-26T05:30
2. Venus 1 flyby 1998-04-26T12:54 - 1998-05-08T19:21*
3. Instrument Checkout 1998-12-30T09:10 - 1999-01-19T05:40
4. Venus 2 flyby 1999-06-24T09:08 - 1999-06-24T21:20
5. Earth flyby 1999-08-13T17:39 - 1999-09-14T22:20
*Actual interval for science data is much shorter than this.
Beginning in February of 2000 the instrument was operated
more-or-less continuously; two gaps of the order of six weeks were
incurred for the purposes of loading new attitude control and
command and data system flight software, gaps of a few days each
were incurred approximately twice per year because of Huygens Probe
testing, and gaps of several days in duration occurred during solar
conjunction periods prior to 2002. Remaining gaps are due to
spacecraft anomaly resolution or simply to downlink gaps, some of
which were imposed by limitations on DSN station availability.
Limitations
===========
The only known measurement quality issue is occasional elevated
noise levels (by a few to 10 dB) in the second band of the MFR.
During tour, it is anticipated that data from the Waveform Receiver
(WFR) sometimes referred to as the medium frequency digital receiver
(MFDR) can be substituted for these."
END_OBJECT = DATA_SET_INFORMATION
OBJECT = DATA_SET_TARGET
TARGET_NAME = VENUS
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = EARTH
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = JUPITER
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SATURN
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SOLAR_SYSTEM
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_HOST
INSTRUMENT_HOST_ID = CO
INSTRUMENT_ID = RPWS
END_OBJECT = DATA_SET_HOST
OBJECT = DATA_SET_REFERENCE_INFORMATION
REFERENCE_KEY_ID = "GURNETTETAL2004"
END_OBJECT = DATA_SET_REFERENCE_INFORMATION
END_OBJECT = DATA_SET
END
Sample RPWS_RAW_COMPLETE Label File
PDS_VERSION_ID = PDS3
/* File characteristics */
RECORD_TYPE = UNDEFINED
FILE_RECORDS = 4838
DESCRIPTION = "T1999230_01_RAW.PKT contains raw Cassini
Radio and Plasma Wave (RPWS) telemetry data for the time period
between 1999-230T01:00:00.000 and 1999-230T02:00:00.000 that
includes the following targets: EARTH,
SOLAR SYSTEM."
/* Data object pointers */
^RPWS_RAW_ROW_PREFIX_TABLE = ("T1999230_01_RAW.PKT", 1)
^RPWS_RAW_PACKET_TABLE = ("T1999230_01_RAW.PKT", 1)
/* Identification */
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-2-REFDR-ALL-V1.0"
DATA_SET_NAME = "
CO V/E/J/S/SS RPWS 2 REFDR RAW SCIENCE TELEMETRY V1.0"
PRODUCT_ID = "T1999230_01_RAW_V1"
PRODUCT_CREATION_TIME = 2004-03-03
START_TIME = 1999-230T01:00:00.000Z
STOP_TIME = 1999-230T02:00:00.000Z
SPACECRAFT_CLOCK_START_COUNT = "1/1313629607:156"
SPACECRAFT_CLOCK_STOP_COUNT = "1/1313633207:162"
PRODUCT_TYPE = DATA
STANDARD_DATA_PRODUCT_ID = RPWS_RAW_COMPLETE
MISSION_PHASE_NAME = {"EARTH ENCOUNTER",
"INTERPLANETARY CRUISE",
"VENUS 2 - EARTH CRUISE"}
TARGET_NAME = {"EARTH",
"SOLAR SYSTEM"}
SOFTWARE_VERSION_ID = "RPWS_HR_AR V5.3"
/* Instrument description */
INSTRUMENT_HOST_NAME = "CASSINI ORBITER"
INSTRUMENT_HOST_ID = CO
INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE"
INSTRUMENT_ID = RPWS
/* Record header */
OBJECT = RPWS_RAW_ROW_PREFIX_TABLE
NAME = RPWS_RAW_ROW_PREFIX_TABLE
INTERCHANGE_FORMAT = BINARY
ROWS = 4838
COLUMNS = 1
ROW_BYTES = 268
START_BYTE = 1
ROW_SUFFIX_BYTES = 65536
DESCRIPTION = "ROW_SUFFIX_BYTES is
variable length. See RPWS Users Guide.
This table describes the structure of the
record header attached to each row of raw data."
^STRUCTURE = "RPWS_RAW_ROW_PREFIX.FMT"
END_OBJECT = RPWS_RAW_ROW_PREFIX_TABLE
/* Data samples */
OBJECT = RPWS_RAW_PACKET_TABLE
NAME = RPWS_RAW_PACKET_TABLE
INTERCHANGE_FORMAT = BINARY
ROWS = 4838
COLUMNS = 1
ROW_BYTES = 65536
START_BYTE = 269
ROW_PREFIX_BYTES = 268
DESCRIPTION = "Variable length and
variable format table. See RPWS Users Guide
for details. This is the RPWS logical
transport packet. Each record is the result of a
complete data collection cycle of one of the
receivers within the instrument."
^STRUCTURE = "RPWS_RAW_MINIPACKET.FMT"
END_OBJECT = RPWS_RAW_PACKET_TABLE
END
RPWS_RAW_ROW_PREFIX.FMT
/****************************************************************************/
/* RPWS_RAW_ROW_PREFIX.FMT */
/* */
/* 07 JUL 2003 First issue */
/* */
/* RPWS_RAW_ROW_PREFIX.FMT */
/* describes a portion of the structure of the row prefix table */
/* (record header) for the Cassini RPWS RAW archive files */
/* (sometimes called the "U" files) */
/****************************************************************************/
OBJECT = COLUMN
NAME = RECORD_BYTES
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 1
BYTES = 4
DESCRIPTION = "total record length - 4.
In other words, the number of octets in the record NOT including
this length word."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECORD_TYPE
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 5
BYTES = 4
DESCRIPTION = "Indicates the receiver from which
this data record originated."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECORD_STATUS
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 9
BYTES = 4
DESCRIPTION = "See RPWS Users Guide."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = LENGTH_DATA_START
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 61
BYTES = 4
DESCRIPTION = "Data octet count - 3
prior to decompression."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = LENGTH_DATA_LENGTH
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 65
BYTES = 4
DESCRIPTION = "Data octet count - 3"
END_OBJECT = COLUMN
RPWS_RAW_MINIPACKET.FMT
/****************************************************************************/
/* RPWS_RAW_MINIPACKET.FMT */
/* */
/* 21 NOV 2003 update RECORD_TYPE(STIM) */
/* 07 JUL 2003 First issue */
/* */
/* RPWS_RAW_MINIPACKET.FMT */
/* describes the structure of the RPWS minipacket */
/* Cassini RPWS RAW archive files (sometimes calles the "U" files) */
/* */
/* Describing the raw data formats is beyond the scope of PDS labels. */
/* Please refer to the RPWS USers Guide for details required to extract */
/* data and status from the raw data files. */
/****************************************************************************/
OBJECT = COLUMN
NAME = RECORD_HEADER
DATA_TYPE = BIT_STRING
START_BYTE = 1
BYTES = 2
DESCRIPTION = "Minipacket Header"
OBJECT = BIT_COLUMN
NAME = RECORD_TYPE
BIT_DATA_TYPE = MSB_INTEGER
START_BIT = 1
BITS = 4
DESCRIPTION = "Minipacket ID.
0000 = STIM data
0001 = MFR data
0010 = HFR data
0100 = LP data
1000 = WFR data
0111 = LFDR data
1011 = DUST data (not impl. as of FSW V2.6)
1100 = BFDL status (not impl. as of FSW V2.6)
1101 = MRO data
1110 = WBR data
1111 = FILL fill"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = MINIPACKET_LENGTH
BIT_DATA_TYPE = MSB_INTEGER
START_BIT = 5
BITS = 12
DESCRIPTION = "Minipacket Length - 3.
Number of octets in the minipack minus 3
(add three to this to get overall length)."
END_OBJECT = BIT_COLUMN
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECORD_TYPE
DATA_TYPE = LSB_UNSIGNED_INTEGER
START_BYTE = 3
BYTES = 2
DESCRIPTION = "RTI counter"
COMMENT_TEXT = "Note this is an LSB INTEGER"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECORD_STATUS_AND_DATA
DATA_TYPE = CHARACTER
START_BYTE = 5
BYTES = 65536
DESCRIPTION = "VARIABLE LENGTH FIELD
See RPWS Users Guide.
Each receiver assigns status bits as required
(variable number of octets)."
END_OBJECT = COLUMN
Appendix D: Sample labels for RPWS_LOW_RATE_FULL
Data Set Information Catalog File: LRFULLDS.CAT
PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "
2003-01-12, William Kurth (U. IOWA), initial;
2003-06-26, William Kurth (U. IOWA), general revision;
2004-02-10, William Kurth (U. IOWA), fixed liens;"
RECORD_TYPE = STREAM
OBJECT = DATA_SET
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0"
OBJECT = DATA_SET_INFORMATION
DATA_SET_NAME = "
CASSINI V/E/J/S/SS RPWS CALIBRATED LOW RATE FULL RES V1.0"
DATA_SET_COLLECTION_MEMBER_FLG = "N"
DATA_OBJECT_TYPE = TABLE
ARCHIVE_STATUS = IN_PEER_REVIEW
START_TIME = 1997-298T00:00:00.000Z
STOP_TIME = NULL
DATA_SET_RELEASE_DATE = 2003-06-30
PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"
DETAILED_CATALOG_FLAG = "N"
DATA_SET_TERSE_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) calibrated full
resolution data set includes all spectral information calibrated
in units of spectral density for the entire Cassini mission."
ABSTRACT_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) calibrated full
resolution data set includes all spectral information calibrated
in units of spectral density for the entire Cassini mission. This
data set includes calibrated values for each frequency channel for
each sensor for all times during the mission including the two
Venus flybys, the Earth flyby, the Jupiter flyby, interplanetary
cruise, and the entire Saturn tour. Data for this data set are
acquired from the RPWS Low Frequency Receiver (LFR), Medium
Frequency Receiver (MFR), Medium Frequency Digital Receiver (MFDR)
(which can be used to replace MFR band 2 data) and High Frequency
Receiver (HFR). Data are presented in a set of tables organized
so as to have fixed-length records for ease in data handling.
This data set is intended to be the most comprehensive and
complete data set included in the Cassini RPWS archive. A browse
data set is included with these data which provides for a
graphical search of the data using a series of thumbnail and
full-sized spectrograms which lead the user to the particular data
file(s) of interest. This data set should be among the first used
by a user of any of the RPWS archive as it will lead one to
information required to search for more detailed or highly
specialized products."
CITATION_DESC = "Kurth, W.S., R.A. Johnson, and L.J.
Granroth, CASSINI V/E/J/S/SS RPWS CALIBRATED LOW RATE FULL RES
V1.0, CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0, NASA Planetary Data
System, 2004."
DATA_SET_DESC = "
Data Set Overview
=================
The Cassini Radio and Plasma Wave Science (RPWS) calibrated full
resolution data set includes all spectral information calibrated in
units of spectral density for the entire Cassini mission. This data
set includes calibrated values for each frequency channel for each
sensor for all times during the mission including the two Venus
flybys, the Earth flyby, the Jupiter flyby, interplanetary cruise,
and the entire Saturn tour. Data for this data set are acquired
from the RPWS Low Frequency Receiver (LFR), Medium Frequency
Receiver (MFR), Medium Frequency Digital Receiver (MFDR) (which can
be used to replace MFR band 2 data) and High Frequency Receiver
(HFR). Data are presented in a set of tables organized so as to
have fixed-length records for ease in data handling. This data set
is intended to be the most comprehensive and complete data set
included in the Cassini RPWS archive. A browse data set is included
with these data which provides for a graphical search of the data
using a series of thumbnail and full-sized spectrograms which lead
the user to the particular data file(s) of interest. This data set
should be among the first used by a user of any of the RPWS archive
as it will lead one to information required to search for more
detailed or highly specialized products.
Parameters
==========
This data set comprises electric and magnetic field spectral
densities for each sensor, frequency channel, and time step for
which data were acquired by the RPWS.
Processing
==========
Data in this data set were processed by the use of a number of
software programs which assemble segmented mini-packets in the raw
telemetry packets into complete sets, de-compress the data that were
compressed by one of a number of compression algorithms by the RPWS
flight software onboard, apply conversion lookup tables or
algorithms to convert telemetry data numbers into physical units,
and make any corrections required for antenna capacitive loading or
other effects. See chapters 5 - 11 of the RPWSCAL document in the
DOCUMENT directory for details on how the data included in this data
set were calibrated. These data are calibrated using the best
calibration tables and algorithms available at the time the data
were archived. Should a significant improvement in calibration
become available, an erratum will be noted in the erratum section.
Later versions of the products may contain better calibrations.
Data
====
The RPWS calibrated full resolution data set includes several binary
tables of wave spectra as a function of time from each of the
various receivers of the RPWS, including the LFR, MFR, MFDR, and
HFR. Each table will contain fixed-length records including columns
for time, sensor, and spectral densities for each channel in that
receiver. The HFR can be reconfigured for a wide range of spectral
resolutions and frequency ranges which has the effect of changing
the number of channels, hence, record length. Therefore, for each
day, a different file will be used for different modes of the HFR
which have different numbers of channels, hence, record lengths.
Ancillary Data
==============
Ancillary data included with this data set collection include a
series of files that describe the modes of the RPWS as a function of
time and provide a time- ordered listing of Instrument Expanded
Block (IEB) trigger commands (the mode by which the RPWS is
reconfigured). Also a detailed description of each of the modes (or
IEBs) is provided.
Other data which are ancillary to this data set but which are
archived separately from this collection are the Navigation and
Ancillary Information Facility's SPICE kernels describing the
position and attitude of Cassini and various solar system bodies as
a function of time.
Coordinate System
=================
The data in this data set are measurements of wave electric and
magnetic fields measured by the RPWS electric and magnetic sensors.
These fields are presented as detected by the sensors and are not
rotated into any other coordinate system. If desired the SPICE
kernels can be used with the SPICE toolkit to convert from the
spacecraft frame to virtually any frame which may be of use in
analyzing these data. However, for many purposes, the wave
amplitudes are extremely useful and may be entirely adequate with no
coordinate transformations at all.
Software
========
Sample code is provided with these data which demonstrates how to
read these files in order to build a set of time-ordered wave
spectra. For some uses it may be necessary to convert from the
supplied spectral density units to units of power flux or electric
or magnetic field. Sample code and algorithms are also included to
perform these conversions. The sample code and algorithms are found
in the EXTRAS/SOFTWARE directory.
Media/Format
============
These data are supplied to the Planetary Data System on DVD-R media
using formats and standards of the PDS for such media."
CONFIDENCE_LEVEL_NOTE = "
Confidence Level Overview
=========================
This data set contains all low rate full resolution calibrated data
for the Cassini RPWS instrument for the interval described above.
Every effort has been made to ensure that all data returned to JPL
from the spacecraft is included and that the calibration is
accurate. The middle band of the MFR (Band 2, 180 - 1500 Hz) has
shown a tendency to have an increased noise level by as much as 10
dB at times, although there is no current explanation for this or
known factor which would enable this condition to be predicted.
In some instrument modes data are collected in the high band of
the WFR which can be used to replace the data in MFR Band 2;
these replacement data are referred to as MFDR data.
Review
======
The RPWS full resolution low rate data will be reviewed internally
by the Cassini RPWS team prior to release to the PDS. The data set
will also be peer reviewed by the PDS.
Data Coverage and Quality
=========================
All data in the stated interval are included, to the best of our
knowledge and attempts to determine completeness. In general, the
instrument was operated only briefly during early tour for the
following intervals:
1. Antenna deployment 1997-10-25T00:00 - 1997-10-26T05:30
2. Venus 1 flyby 1998-04-26T12:54 - 1998-05-08T19:21*
3. Instrument Checkout 1998-12-30T09:10 - 1999-01-19T05:40
4. Venus 2 flyby 1999-06-24T09:08 - 1999-06-24T21:20
5. Earth flyby 1999-08-13T17:39 - 1999-09-14T22:20
*Actual interval for science data is much shorter than this.
Beginning in February of 2000 the instrument was operated
more-or-less continuously; two gaps of the order of six weeks were
incurred for the purposes of loading new attitude control and
command and data system flight software, gaps of a few days each
were incurred approximately twice per year because of Huygens Probe
testing, and gaps of several days in duration occurred during solar
conjunction periods prior to 2002. Remaining gaps are due to
spacecraft anomaly resolution or simply to downlink gaps, some of
which were imposed by limitations on DSN station availability.
Limitations
===========
The only known measurement quality issue is occasional elevated
noise levels (by a few to 10 dB) in the second band of the MFR.
During tour, it is anticipated that data from the Waveform Receiver
(WFR) sometimes referred to as the medium frequency digital receiver
(MFDR) can be substituted for these."
END_OBJECT = DATA_SET_INFORMATION
OBJECT = DATA_SET_TARGET
TARGET_NAME = VENUS
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = EARTH
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = JUPITER
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SATURN
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SOLAR_SYSTEM
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_HOST
INSTRUMENT_HOST_ID = CO
INSTRUMENT_ID = RPWS
END_OBJECT = DATA_SET_HOST
OBJECT = DATA_SET_REFERENCE_INFORMATION
REFERENCE_KEY_ID = "GURNETTETAL2004"
END_OBJECT = DATA_SET_REFERENCE_INFORMATION
END_OBJECT = DATA_SET
END
Sample RPWS_LOW_RATE_FULL Label File
PDS_VERSION_ID = PDS3
/* label standards identifiers PDS Version 3.5 */
DESCRIPTION = "T1999230_HFR1.DAT contains fully calibrated, full resolution
Cassini Radio and Plasma Wave (RPWS) low rate data for the time period
between 1999-230T00:00:00.000 and 1999-231T00:00:00.000 and includes
the following targets: EARTH,SOLAR SYSTEM."
/* pds label for a rpws low rate full */
RECORD_TYPE = FIXED_LENGTH
RECORD_BYTES = 256
FILE_RECORDS = 533
/* pointers to start records of objects in file, std ref3.5:5.3.3.2 */
^LRFULL_TABLE = ("T1999230_HFR1.DAT",1)
^TIME_TABLE = ("T1999230_HFR1.DAT",2)
^FREQUENCY_TABLE = ("T1999230_HFR1.DAT",3)
^SPECTRAL_DENSITY_TABLE = ("T1999230_HFR1.DAT",4)
/* identification data elements - data product labels, std ref3.5:5.3.4.1 */
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0"
STANDARD_DATA_PRODUCT_ID = RPWS_LOW_RATE_FULL
PRODUCT_TYPE = DATA
PRODUCT_ID = "T1999230_HFR1_V1"
INSTRUMENT_HOST_NAME = "CASSINI ORBITER"
INSTRUMENT_HOST_ID = CO
INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE"
INSTRUMENT_ID = RPWS
SECTION_ID = HFR
MISSION_PHASE_NAME = {"EARTH ENCOUNTER","VENUS 2 - EARTH CRUISE",
"INTERPLANETARY CRUISE"}
TARGET_NAME = {"EARTH","SOLAR SYSTEM"}
START_TIME = 1999-230T00:00:00.000Z
STOP_TIME = 1999-231T00:00:00.000Z
SPACECRAFT_CLOCK_START_COUNT = "1/1313626007:150"
SPACECRAFT_CLOCK_STOP_COUNT = "1/1313712408:040"
PRODUCT_CREATION_TIME = 2003-10-17
NOTE = "
/************************************************************************/
/* Record Structure */
/* +------------------------------------------------------------+ */
/* ROW 1 | LRFULL_TABLE (FILE_ID RECORD_LENGTH NUMBER_OF_RECORDS ETC) | */
/* +------+------+--------+---------------+-----+---------------+ */
/* ROW 2 | SCLK | SCET | SPARE | TIME_OFFSET_0 | ... | TIME_OFFSET_N | */
/* +------+------+--------+---------------+-----+---------------+ */
/* ROW 3 | SCLK | SCET | SPARE | FREQUENCY_0 | ... | FREQUENCY_N | */
/* +------+------+--------+---------------+-----+---------------+ */
/* ROW 4 | SCLK | SCET | SENSOR | DENSITY_0 | ... | DENSITY_N | */
/* +------+------+--------+---------------+-----+---------------+ */
/* ... | .... | .... | ...... | ............. | ... | ............. | */
/* +------+------+--------+---------------+-----+---------------+ */
/* ROW M | SCLK | SCET | SENSOR | DENSITY_0 | ... | DENSITY_N | */
/* +------+------+--------+---------------+-----+---------------+ */
/* BYTE 1 7 13 17 */
/* */
/* */
/* TIME_OFFSET - The number of seconds from the beginning of the data */
/* acquisition when the individual sample was captured. */
/* */
/* SCLK - The spacecraft clock marking the beginning of the data */
/* acquisition. */
/* */
/* SCET - The spacecraft event time marking the beginning of the data */
/* acquisition, UTC. */
/* */
/* SENSOR - Identifies which antenna sampled the data. */
/* */
/* DENSITY - Calibrated spectral density, either electric or magnetic. */
/* */
/************************************************************************/
"
/* descriptive data elements */
OBJECT = LRFULL_TABLE
NAME = LRFULL_TABLE
INTERCHANGE_FORMAT = BINARY
ROW_BYTES = 256
ROWS = 1
COLUMNS = 8
^STRUCTURE = "LRFULL_TABLE.FMT"
END_OBJECT = LRFULL_TABLE
OBJECT = TIME_TABLE
NAME = TIME_TABLE
INTERCHANGE_FORMAT = BINARY
ROW_BYTES = 256
ROWS = 1
COLUMNS = 6
^STRUCTURE = "RPWS_SCLK_SCET.FMT"
OBJECT = COLUMN
NAME = TIME
DATA_TYPE = IEEE_REAL
START_BYTE = 17
BYTES = 240
ITEMS = 60
ITEM_BYTES = 4
UNIT = SECOND
DESCRIPTION = "Time offset of individual samples
in corresponding columns relative
to time tag of each row."
END_OBJECT = COLUMN
END_OBJECT = TIME_TABLE
OBJECT = FREQUENCY_TABLE
NAME = FREQUENCY_TABLE
INTERCHANGE_FORMAT = BINARY
ROW_BYTES = 256
ROWS = 1
COLUMNS = 6
^STRUCTURE = "RPWS_SCLK_SCET.FMT"
OBJECT = COLUMN
NAME = FREQUENCY
DATA_TYPE = IEEE_REAL
START_BYTE = 17
BYTES = 240
ITEMS = 60
ITEM_BYTES = 4
UNIT = HERTZ
DESCRIPTION = "Frequency of spectral densities in
corresponding columns."
END_OBJECT = COLUMN
END_OBJECT = FREQUENCY_TABLE
OBJECT = SPECTRAL_DENSITY_TABLE
NAME = SPECTRAL_DENSITY_TABLE
INTERCHANGE_FORMAT = BINARY
ROW_BYTES = 256
ROWS = 530
COLUMNS = 7
^STRUCTURE = "LRFC_DATA_QUALITY.FMT"
OBJECT = COLUMN
NAME = SPECTRAL_DENSITY
DATA_TYPE = IEEE_REAL
START_BYTE = 17
BYTES = 240
ITEMS = 60
ITEM_BYTES = 4
UNIT = {"VOLT**2/M**2/HZ", "NANOTESLA**2/HZ "}
DESCRIPTION = "Calibrated spectral densities from one
of several sensors. Units for Ex, Eu
Ev, Ew, Hf sensors are
VOLT**2/M**2/HZ. Units for Bx, By,
Bz sensors are NANOTESLA**2/HZ"
END_OBJECT = COLUMN
END_OBJECT = SPECTRAL_DENSITY_TABLE
END
RPWS_SCLK_SCET.FMT
/**********************************************************************/
/* RPWS_SCLK_SCET.FMT */
/* describes the structure of the spacecraft clock and spacecraft */
/* event time objects common to many Cassini RPWS archive files. */
/**********************************************************************/
OBJECT = COLUMN
NAME = SCLK_SECOND
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 1
BYTES = 4
DESCRIPTION = "Spacecraft clock counter increments each
second, beginning at approximately 1958-01-01T00:00:00Z."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SCLK_PARTITION
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 5
BYTES = 1
VALID_MINIMUM = 0
VALID_MAXIMUM = 255
DESCRIPTION = "Spacecraft clock partition.
A value of ZERO or ONE indicates the first partition
(i.e. the spacecraft clock has not been reset)."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SCLK_FINE
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 6
BYTES = 1
VALID_MINIMUM = 0
VALID_MAXIMUM = 255
DESCRIPTION = "Spacecraft clock modulo 256 counter
increments 256 times per second. Since the RTI increments from
0 through 7 in this same interval, SCLK_FINE / 32 yields the
RTI count.
For RPWS, SCLK_FINE is maintained within the instrument to an
accuracy of one RTI period. Time tags should occur only with
the following values for SCLK_FINE : 0, 32, 64, 96, 128, 160,
192, and 224"
END_OBJECT = COLUMN
/**********************************************************************/
/* Note about archive product time-tags: */
/* We should be masking (removing) the lower 5 bits */
/* of SCLK_FINE prior to using SPICE to calculate SCET. */
/* */
/* RPWS time keeping occurs only with a resolution of the */
/* RTI period (ignore the sub-RTI counter we use with the */
/* WBR, the sub-RTI timing is included in the WBR minipacket). */
/* Both HRP and LRP use bit 0 to indicate a CDS clock */
/* update has not occurred in the last second (should always */
/* be clear on LRP and always set on HRP). */
/* Both LRP and HRP use bits 1-4 to hold a CDS packet count. */
/* LRP sets this counter to 0 while HRP start this count */
/* at 1, incrementing with each packet that is processed */
/* within any RTI period (in other words, HRP resets this */
/* counter to 1 when the RTI interrupt occurs). */
/* */
/* This has the side-effect that all SCLK values delivered by */
/* RPWS are unique. This also makes query by SCLK or SCET */
/* return data in an unambiguous order. */
/* */
/* BUT!!! It is necessary to clear bits 0-4 of the SCLK_FINE */
/* in order to get back to the intended (correct) time. */
/**********************************************************************/
OBJECT = COLUMN
NAME = SCET_DAY
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 7
BYTES = 2
DESCRIPTION = "Spacecraft event time days since
1958-01-01T00:00:00Z"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SCET_MILLISECOND
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 9
BYTES = 4
VALID_MINIMUM = 0
VALID_MAXIMUM = 86401999
DESCRIPTION = "Spacecraft event time millisecond
of day allowing for up to two leap seconds."
END_OBJECT = COLUMN
/* END OF RPWS_SCLK_SCET.FMT */
LRFULL_TABLE.FMT
/* */
/* LRFULL_TABLE.FMT */
/* */
OBJECT = COLUMN
NAME = FILE_ID
DATA_TYPE = CHARACTER
START_BYTE = 1
BYTES = 8
DESCRIPTION = "'CORPWS01' for the file id."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECORD_LENGTH
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 9
BYTES = 4
DESCRIPTION = "The length of each record in bytes."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECORDS
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 13
BYTES = 4
DESCRIPTION = "The total number of records."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = RECEIVER_TYPE
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 17
BYTES = 4
DESCRIPTION = "Logical RPWS Instrument ID Number."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = MINI_PACKET_HEADER
DATA_TYPE = MSB_BIT_STRING
START_BYTE = 25
BYTES = 24
DESCRIPTION = "The mini-packet header which is representative
for the data contained in the file."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SCET
DATA_TYPE = CHARACTER
START_BYTE = 49
BYTES = 16
DESCRIPTION = "The standard JPL spacecraft event time description:
yyyy-doyThh:mm, seconds and milliseconds are
assumed zero. This is half of the SCLK/SCET
pair produce by the SPICE kernel for the beginning
of each day."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SCLK
COLUMN_NUMBER = 5
DATA_TYPE = CHARACTER
START_BYTE = 65
BYTES = 16
DESCRIPTION = "The standard JPL spacecraft clock time description:
ssssssssss.fff. This is half of the SCLK/SCET
pair produce by the SPICE kernel for the beginning
of each day."
END_OBJECT = COLUMN
Appendix E: Sample labels for RPWS_WIDEBAND_FULL
Data Set Information Catalog File: WBFULLDS.CAT
PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "
2003-01-12, William Kurth (U. IOWA), initial;
2003-06-26, William Kurth (U. IOWA), general revision;
2004-02-10, William Kurth (U. IOWA), fixed liens;"
RECORD_TYPE = STREAM
OBJECT = DATA_SET
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0"
OBJECT = DATA_SET_INFORMATION
DATA_SET_NAME = "
CASSINI V/E/J/S/SS RPWS EDITED WIDEBAND FULL RES V1.0"
DATA_SET_COLLECTION_MEMBER_FLG = "N"
DATA_OBJECT_TYPE = TIME_SERIES
ARCHIVE_STATUS = IN_PEER_REVIEW
START_TIME = 1997-298T00:00:00.000Z
STOP_TIME = NULL
DATA_SET_RELEASE_DATE = 2003-06-30
PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"
DETAILED_CATALOG_FLAG = "N"
DATA_SET_TERSE_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) edited full
resolution wideband (WBR) data set includes all wideband waveform
data for the entire Cassini mission."
ABSTRACT_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) edited full
resolution data set includes all wideband waveform data for the
entire Cassini mission. This data set includes uncalibrated
values for each wideband channel for each sensor for all times
during the mission including the second Venus flyby, the Earth
flyby, the Jupiter flyby, interplanetary cruise, and the entire
Saturn tour. Data for this data set are acquired from the RPWS
Wideband Receiver (WBR). Data are presented in a set of time
series organized so as to have fixed-length records for ease in
data handling. Data from the different WBR modes (i.e. 10-kHz,
80-kHz, and frequency-translated 80-kHz data) are segregated into
separate files. This data set includes all wideband data acquired
by the RPWS. A browse data set is included with these data which
provides for a graphical search of the data using a series of
thumbnail and full-sized spectrograms which lead the user to the
particular data file(s) of interest. The wideband data provide the
highest resolution data from the RPWS instrument in the form of a
set of waveform series. These data can be used in their original
time domain in order to look for solitary features such as dust
impacts or electrostatic solitary waves. Or, they can be
transformed into the frequency domain in order to examine the
detailed time and spectral evolution of plasma waves or radio
emissions."
CITATION_DESC = "Kurth, W.S., W.T. Robison, and L.J.
Granroth, CASSINI V/E/J/S/SS RPWS EDITED WIDEBAND FULL RES V1.0,
CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0, NASA Planetary Data
System, 2004."
DATA_SET_DESC = "
Data Set Overview
=================
The Cassini Radio and Plasma Wave Science (RPWS) edited full
resolution data set includes all wideband waveform data for the
entire Cassini mission. This data set includes uncalibrated values
for each wideband channel for each sensor for all times during the
mission including the second Venus flyby, the Earth flyby, the
Jupiter flyby, interplanetary cruise, and the entire Saturn tour.
Data for this data set are acquired from the RPWS Wideband Receiver
(WBR). Data are presented in a set of time series organized so as
to have fixed-length records for ease in data handling. Data from
the different WBR modes (i.e. 10-kHz, 80-kHz, and
frequency-translated 80-kHz data) are segregated into separate
files. This data set includes all wideband data acquired by the
RPWS. A browse data set is included with these data which provides
for a graphical search of the data using a series of thumbnail and
full-sized spectrograms which lead the user to the particular data
file(s) of interest. The wideband data provide the highest
resolution data from the RPWS instrument in the form of a set of
waveform series. These data can be used in their original time
domain in order to look for solitary features such as dust impacts
or electrostatic solitary waves. Or, they can be transformed into
the frequency domain in order to examine the detailed time and
spectral evolution of plasma waves or radio emissions.
Parameters
==========
This data set comprises time series of data numbers related to the
potential difference at the preamp input to the RPWS. The data
numbers can be calibrated with the use of supplied algorithms and
calibration factors to generate a time series of electric or
magnetic field waveforms in units of Volts/meter or nanoTesla.
Because of the enhanced sensitivity of the electric antennas,
most data in this data set are acquired using the Ex dipole
antenna. The waveforms can be acquired in one of three modes:
1. 10-kHz baseband mode: 0.06 - 10.5 kHz, 36 microsecond sampling
rate
2. 75-kHz baseband mode: 0.8 - 75 kHz, 4.5 microsecond sampling
rate
3. 75-kHz frequency translation mode; 25-kHz bandwidth
down-converted to the frequency range of 50 to 75 kHz, 4.5
microsecond sampling rate.
In the third mode, the frequency range analyzed is selectable from a
range of 125 kHz to 16 MHz.
Typically, data are acquired in time series with length of a
multiple of 512 8-bit samples, usually with this length set to 2048
samples. For the 10-kHz mode, this results in time series of
duration about 74 msec and for the 75-kHz mode, the duration of the
waveform series is typically about 9 msec. A new waveform series
can be acquired as often as once per 125 msec. Hence, the duty
cycle for this mode can be very small (e.g. 9 msec out of 125 msec
or about 7 percent for the 75 kHz mode or closer to 50 percent for
the 10-kHz mode) with typical sample lengths.
Processing
==========
Data in this data set were processed by the use of a number of
software programs which assemble segmented mini-packets in the raw
telemetry packets into complete sets and de-compress the data that
were compressed by one of several possible compression algorithms.
These data may be calibrated using supplied calibration factors and
algorithms as well as sample code provided.
Data
====
The RPWS full resolution wideband data set is organized by receiver
mode and time series sample length in order to generate files with
fixed record lengths. Each time series is a record in a file with
header information on time, sensor, and receiver gain (required for
calibration). Separate files will be maintained for each instrument
mode and time series length.
Ancillary Data
==============
Ancillary data included with this data set collection include a
series of files that describe the modes of the RPWS as a function of
time and provide a time-ordered listing of Instrument Expanded Block
(IEB) trigger commands (the mode by which the RPWS is reconfigured).
Also a detailed description of each of the modes (or IEBs) is
provided.
Other data which are ancillary to this data set but which are
archived separately from this collection are the Navigation and
Ancillary Information Facility's SPICE kernels describing the
position and attitude of Cassini and various solar system bodies as
a function of time.
Coordinate System
=================
The data in this data set are measurements of wave electric and
magnetic fields measured by the RPWS electric and magnetic sensors.
These fields are presented as detected by the sensors and are not
rotated into any other coordinate system. If desired the SPICE
kernels can be used with the SPICE toolkit to convert from the
spacecraft frame to virtually any frame which may be of use in
analyzing these data. However, for many purposes, the wave
amplitudes are extremely useful and may be entirely adequate with no
coordinate transformations at all.
Software
========
Sample code is provided with these data which demonstrates how to
read these files in order to build a set of waveform time series.
Algorithms and sample code is provided which convert from data
number to either electric or magnetic field strength (units of
volt/meter or nanoTesla). Sample code and algorithms are also
included to perform these conversions. The sample code and
algorithms are found in the EXTRAS/SOFTWARE directory. A
description of how to access and calibrate these data is included in
WBRWFR.TXT in the DOCUMENT directory. Also see the RPWSCAL document
in the same directory.
Media/Format
============
These data are supplied to the Planetary Data System on DVD-R media
using formats and standards of the PDS for such media."
CONFIDENCE_LEVEL_NOTE = "
Confidence Level Overview
=========================
This data set contains all wideband data for the Cassini RPWS
instrument for the interval described above. Every effort has been
made to ensure that all data returned to JPL from the spacecraft is
included and that the calibration information is accurate.
Review
======
The RPWS full resolution wideband data will be reviewed internally
by the Cassini RPWS team prior to release to the PDS. The data set
will also be peer reviewed by the PDS.
Data Coverage and Quality
=========================
All data in the stated interval are included, to the best of our
knowledge and attempts to determine completeness. In general, these
data were acquired during early tour for the following intervals:
1. Antenna deployment 1997-10-25T00:00 - 1997-10-26T05:30
2. Instrument Checkout 1998-12-30T09:10 - 1999-01-19T05:40
3. Venus 2 flyby 1999-06-24T09:08 - 1999-06-24T21:20
4. Earth flyby 1999-08-13T17:39 - 1999-09-14T22:20
*Actual interval for science data is much shorter than this.
Beginning in February of 2000 the instrument was operated
more-or-less continuously; two gaps of the order of six weeks were
incurred for the purposes of loading new attitude control and
command and data system flight software, gaps of a few days each
were incurred approximately twice per year because of Huygens Probe
testing, and gaps of several days in duration occurred during solar
conjunction periods prior to 2002. Remaining gaps are due to
spacecraft anomaly resolution or simply to downlink gaps, some of
which were imposed by limitations on DSN station availability.
During the time interval after February 2000, the wideband data were
acquired during such times when the onboard solid state recorder and
the downlink capability could support the high data volumes required
for these data. Typically, the data are acquired for brief
intervals every several days or weeks during the interplanetary
cruise phase and more regularly but still just briefly every few
hours or so during tour. A user would find events of interest in
the more continuous low rate data and consult the ancillary sequence
information provided to determine the existence of wideband data in
an appropriate mode for that event. Further, a graphical browse
data set is supplied with the archive to allow the user to look at
frequency-time spectrograms directly in order to find events or
phenomena of interest. This browse system will point the user to
the data files containing the data of interest.
Limitations
===========
None known at this time."
END_OBJECT = DATA_SET_INFORMATION
OBJECT = DATA_SET_TARGET
TARGET_NAME = VENUS
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = EARTH
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = JUPITER
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SATURN
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SOLAR_SYSTEM
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_HOST
INSTRUMENT_HOST_ID = CO
INSTRUMENT_ID = RPWS
END_OBJECT = DATA_SET_HOST
OBJECT = DATA_SET_REFERENCE_INFORMATION
REFERENCE_KEY_ID = "GURNETTETAL2004"
END_OBJECT = DATA_SET_REFERENCE_INFORMATION
END_OBJECT = DATA_SET
END
Sample RPWS_WIDEBAND_FULL Label File
PDS_VERSION_ID = PDS3
/* File characteristics */
RECORD_TYPE = FIXED_LENGTH
RECORD_BYTES = 2080
FILE_RECORDS = 8891
DESCRIPTION = "T1999230_02_10KHZ2_WBRFR.DAT contains Cassini
Radio and Plasma Wave (RPWS) wideband data for the time period between
1999-230T02:00:00.000 and 1999-230T03:00:00.000 that includes the
following targets: EARTH,
SOLAR SYSTEM."
/* Data object pointers */
^WBR_ROW_PREFIX_TABLE = ("T1999230_02_10KHZ2_WBRFR.DAT", 1)
^TIME_SERIES = ("T1999230_02_10KHZ2_WBRFR.DAT", 1)
/* Identification */
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0"
DATA_SET_NAME = "
CO V/E/J/S/SS RPWS 2 REFDR WBR FULL RESOLUTION V1.0"
PRODUCT_ID = "T1999230_02_10KHZ2_WBRFR_V1"
PRODUCT_CREATION_TIME = 2004-03-03
START_TIME = 1999-230T02:00:00.000Z
STOP_TIME = 1999-230T03:00:00.000Z
SPACECRAFT_CLOCK_START_COUNT = "1/1313633207:162"
SPACECRAFT_CLOCK_STOP_COUNT = "1/1313636807:168"
NATIVE_START_TIME = -11786335.817
NATIVE_STOP_TIME = -11782735.817
NOTE = "NATIVE_TIME is NAIF 'et' (ephemeris
time or barycentric dynamical time) as used in the spice kernel."
PRODUCT_TYPE = DATA
STANDARD_DATA_PRODUCT_ID = RPWS_WIDEBAND_FULL
MISSION_PHASE_NAME = {"EARTH ENCOUNTER",
"INTERPLANETARY CRUISE",
"VENUS 2 - EARTH CRUISE"}
TARGET_NAME = {"EARTH",
"SOLAR SYSTEM"}
SOFTWARE_VERSION_ID = "RPWS_HR_AR V5.3"
/* Instrument description */
INSTRUMENT_HOST_NAME = "CASSINI ORBITER"
INSTRUMENT_HOST_ID = CO
INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE"
INSTRUMENT_ID = RPWS
SECTION_ID = WBR
/* Data Object Structure */
/**************************************************************/
/* 1 32 33 x1 x2 */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* 1 | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* | | | | */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* 2 | | | | */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* 3 | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* | | | | */
/* +---------------------+---------------------+-------+ */
/* . . . */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* y | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* | | | | */
/* +---------------------+---------------------+-------+ */
/* */
/* 8-bit octet are numbered across the top. */
/* No header records, all records are in the */
/* same format. */
/* Record Number is down the left edge. */
/* */
/* x1 is ROW_BYTES+32 (ITEMS) */
/* x2 is RECORD_BYTES */
/* y is FILE_RECORDS (ROWS) */
/* */
/**************************************************************/
/* Record header */
OBJECT = WBR_ROW_PREFIX_TABLE
NAME = WBR_ROW_PREFIX_TABLE
INTERCHANGE_FORMAT = BINARY
ROWS = 8891
COLUMNS = 19
ROW_BYTES = 32
ROW_SUFFIX_BYTES = 2048
DESCRIPTION = "This table describes the structure of the
record header attached to each row of time series data."
^STRUCTURE = "RPWS_WBR_WFR_ROW_PREFIX.FMT"
END_OBJECT = WBR_ROW_PREFIX_TABLE
/* Data samples */
OBJECT = TIME_SERIES
NAME = WBR_TIME_SERIES
INTERCHANGE_FORMAT = BINARY
ROWS = 8891
COLUMNS = 1
ROW_BYTES = 2048
ROW_PREFIX_BYTES = 32
SAMPLING_PARAMETER_NAME = TIME
SAMPLING_PARAMETER_UNIT = SECOND
SAMPLING_PARAMETER_INTERVAL = 0.000036
DESCRIPTION = "This time series consists of
uncalibrated samples gathered during a 1 hour time span from one
or more detectors. Time interval between TIME_SERIES is
variable."
OBJECT = COLUMN
NAME = WBR_SAMPLE
DATA_TYPE = UNSIGNED_INTEGER
START_BYTE = 33
BYTES = 2048
ITEMS = 2048
ITEM_BYTES = 1
OFFSET = -127.5
VALID_MINIMUM = 0
VALID_MAXIMUM = 255
DESCRIPTION = "The 8-bit unsigned uncalibrated
waveform samples range from 0 to 255. Zero
amplitude is nominally 127.5 with 127 being just
below and 128 just above zero amplitude."
END_OBJECT = COLUMN
END_OBJECT = TIME_SERIES
END
RPWS_WBR_WFR_ROW_PREFIX.FMT
/**********************************************************************/
/* /opt/project/cassini/src/archive/RPWS_WBR_WFR_ROW_PREFIX.FMT */
/* */
/* 23 JUN 2003 update */
/* Corrected */
/* RTI field is MSB_INTEGER (was LSB) */
/* */
/* 29 APR 2003 update */
/* Added */
/* HFR/H1 -> WBR/HF status bit */
/* HFR/H2 -> WBR/HF status bit */
/* FSW version field */
/* Corrected */
/* EU current status bit position */
/* EV current status bit position */
/* */
/* RPWS_WBR_WFR_ROW_PREFIX.FMT */
/* describes the structure of the row prefix table (record header) */
/* for the Cassini RPWS WBR and WFR archive files. Some fields are */
/* valid for only one of the two receivers as noted. Fields that */
/* are not used are always loaded with ZERO. */
/* */
/* RPWS_SCLK_SCET.FMT contains spacecraft clock and spacecraft event */
/* time column descriptions common to several tables. */
/**********************************************************************/
^STRUCTURE = "RPWS_SCLK_SCET.FMT"
OBJECT = COLUMN
NAME = RECORD_BYTES
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 13
BYTES = 2
DESCRIPTION = "Number of octets in the entire RECORD.
This count includes header, time series, and optional fill."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SAMPLES
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 15
BYTES = 2
DESCRIPTION = "Number of valid data samples in the time
series portion of each record. Note that WBR samples are 1 byte
each and WFR samples are 2 bytes each."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = DATA_RTI
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 17
BYTES = 2
DESCRIPTION = "RPWS minipacket collection time. This
modulo 65536 counter increments 8 times per second and is derived
from the low-order 13 bits of SCLK_SECOND and 3-bit RTI when the
data acquisition began."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = VALIDITY_FLAG
DATA_TYPE = MSB_BIT_STRING
START_BYTE = 19
BYTES = 1
OBJECT = BIT_COLUMN
NAME = MSF
BIT_DATA_TYPE = BOOLEAN
START_BIT = 1
BITS = 1
DESCRIPTION = "This bit is used to indicate validity of
header fields SUB_RTI, HFR_XLATE, LP_DAC_0, and LP_DAC_1.
0 = Fields do not contain valid data
1 = Fields may contain valid data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = WBR
BIT_DATA_TYPE = BOOLEAN
START_BIT = 2
BITS = 1
DESCRIPTION = "This bit is used to indicate WBR data
is in this record.
0 = not WBR data
1 = WBR data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = WFR
BIT_DATA_TYPE = BOOLEAN
START_BIT = 3
BITS = 1
DESCRIPTION = "This bit is used to indicate WFR data
is in this record.
0 = not WFR data
1 = WFR data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = VALID_WALSH_DGF
BIT_DATA_TYPE = BOOLEAN
START_BIT = 4
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
WALSH_DGF field contains valid data (WFR only).
0 = WALSH_DGF not in use (contents invalid)
1 = WALSH_DGF contains valid data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = VALID_SUB_RTI
BIT_DATA_TYPE = BOOLEAN
START_BIT = 5
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
SUB_RTI field contains valid data (WBR only).
0 = SUB_RTI not in use (contents invalid)
1 = SUB_RTI contains valid data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = VALID_HFR_XLATE
BIT_DATA_TYPE = BOOLEAN
START_BIT = 6
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
HFR_XLATE field contains valid data (WBR only)
0 = HFR_XLATE not in use (contents invalid)
1 = HFR_XLATE contains valid data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = VALID_LP_DAC_0
BIT_DATA_TYPE = BOOLEAN
START_BIT = 7
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
LP_DAC_0 field contains valid data
0 = LP_DAC_0 not in use (contents invalid)
1 = LP_DAC_0 contains valid data"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = VALID_LP_DAC_1
BIT_DATA_TYPE = BOOLEAN
START_BIT = 8
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
LP_DAC_1 field contains valid data (WFR only)
0 = LP_DAC_1 not in use (contents invalid)
1 = LP_DAC_1 contains valid data"
END_OBJECT = BIT_COLUMN
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = STATUS_FLAG
DATA_TYPE = MSB_BIT_STRING
START_BYTE = 20
BYTES = 1
OBJECT = BIT_COLUMN
NAME = AGC_ENABLE
BIT_DATA_TYPE = BOOLEAN
START_BIT = 1
BITS = 1
DESCRIPTION = "Automatic gain control enable
0 = AGC disabled
1 = AGC enabled
This status bit was added in the V2.6 FSW release. Prior to
2002-12-21 this status bit was always zero. (WBR only)"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = FINE_TIME_QUALITY
BIT_DATA_TYPE = BOOLEAN
START_BIT = 2
BITS = 1
DESCRIPTION = "This bit indicates the accuracy of the
SUB_RTI field that appears in the status field. It is ONLY
MEANINGFUL when MORE_STATUS_FOLLOWS bit is set to ONE.
0 = SUB_RTI is accurate to approximately 1 millisecond
1 = SUB_RTI is accurate to approximately 10 milliseconds
This status bit was added in the V2.6 FSW release. Prior to
2002-12-21 this status bit was always zero. (WBR only)"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = TIMEOUT
BIT_DATA_TYPE = BOOLEAN
START_BIT = 3
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
time series is corrupt due to a timeout condition that occurred in
the instrument hardware.
0 = time series is correctly acquired
1 = time series is corrupt and should be discarded
This status bit was added in the V2.6 FSW release. Prior to
2002-12-21 this status bit was always zero. (WBR only)"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = SUSPECT
BIT_DATA_TYPE = BOOLEAN
START_BIT = 4
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
time series is probably corrupt, it did not pass validity tests.
0 = time series is correctly acquired
1 = time series is may be corrupt; may be best to discard.
This status bit is an indication of a problem introduced by
the ground software."
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = HFR_H2
BIT_DATA_TYPE = BOOLEAN
START_BIT = 5
BITS = 1
DESCRIPTION = "This bit is used to indicate that
the WBR HF input is connected to the HFR/H2 down converter.
0 indicates that HFR/H2 is not connected to the WBR HF
antenna input
1 indicates that HFR/H2 is connected to the WBR HF antenna
input."
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = HFR_H1
BIT_DATA_TYPE = BOOLEAN
START_BIT = 6
BITS = 1
DESCRIPTION = "This bit is used to indicate that
the WBR HF input is connected to the HFR/H1 down converter.
0 indicates that HFR/H1 is not connected to the WBR HF
antenna input
1 indicates that HFR/H1 is connected to the WBR HF antenna
input."
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = EU_CURRENT
BIT_DATA_TYPE = BOOLEAN
START_BIT = 7
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
EU antenna is measuring current (WFR only).
0 indicates voltage measurement
1 indicates current measurement."
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = EV_CURRENT
BIT_DATA_TYPE = BOOLEAN
START_BIT = 8
BITS = 1
DESCRIPTION = "This bit is used to indicate that the
EV antenna is measuring current (WFR only).
0 indicates voltage measurement
1 indicates current measurement."
END_OBJECT = BIT_COLUMN
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = FREQUENCY_BAND
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 21
BYTES = 1
DESCRIPTION = "Frequency band of these samples:
0 = 26 Hz, 10 millisecond sample period (WFR only)
1 = 2.5 KHz, 140 microsecond sample period (WFR only)
2 = 10 KHz filter, 4.5 microsecond sample period (WBR only)
3 = 80 KHz filter, 36 microsecond sample period (WBR only)"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = GAIN
DATA_TYPE = MSB_BIT_STRING
START_BYTE = 22
BYTES = 1
DESCRIPTION = "Composite gain setting"
OBJECT = BIT_COLUMN
NAME = WALSH_DGF
BIT_DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BIT = 3
BITS = 2
DESCRIPTION = "Walsh compression factor (WFR only)
0 = gain level 0 dB
1 = gain level 6 dB
2 = gain level 12 dB
3 = gain level 18 dB"
END_OBJECT = BIT_COLUMN
OBJECT = BIT_COLUMN
NAME = ANALOG_GAIN
BIT_DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BIT = 6
BITS = 3
DESCRIPTION = "Analog gain setting, 0 dB - 70 dB
in 10 dB steps:
0 = gain level 00 dB
1 = gain level 10 dB
2 = gain level 20 dB
3 = gain level 30 dB
4 = gain level 40 dB (WBR only)
5 = gain level 50 dB (WBR only)
6 = gain level 60 dB (WBR only)
7 = gain level 70 dB (WBR only)"
END_OBJECT = BIT_COLUMN
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = ANTENNA
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 23
BYTES = 1
DESCRIPTION = "Antenna selection:
0 = Ex, electric dipole X-direction
1 = Eu, electric U-direction (aka Ex+) (WFR only)
2 = Ev, electric V-direction (aka Ex-) (WFR only)
3 = Ew, electric W-direction (aka Ez)
4 = Bx, magnetic X-direction
5 = By, magnetic Y-direction (WFR only)
6 = Bz, magnetic Z-direction (WFR only)
8 = HF, HFR downconvert (WBR only)
11 = LP, Langmuir probe sphere
15 = unknown, antenna cannot be determined"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = AGC
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 24
BYTES = 1
DESCRIPTION = "Value read from signal level integrator.
Used to make decision about gain level selection for the next time
series. (WBR only)"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = HFR_XLATE
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 25
BYTES = 1
DESCRIPTION = "Translation Frequency when HFR is selected
as a signal source (see ANTENNA column). The translation table may
be found in the Users Guide/Software Operations Manual for RPWS. In
general, odd numbers indicate HFR/H1 is selected with frequency in
25 KHz steps, and even numbers indicate HFR/H2 is selected with
frequency in 50 KHz steps with an offset of 4.025 MHz."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SUB_RTI
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 26
BYTES = 1
DESCRIPTION = "Sub-RTI timing. When WBR is not
running synchronized with the RTI signal, this field contains
additional timing information. This field is the number of
milliseconds into the RTI period that the data acquisition
begins. (WBR only)"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = LP_DAC_0
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 27
BYTES = 1
DESCRIPTION = "Voltage on Langmuir probe sphere DAC when
LP is selected as a signal source (see ANTENNA column). Additional
status from either housekeeping or a concurrent LP data set is
required to obtain the relay/multiplexer setting in order to
determine the actual voltage setting. The Users Guide/Software
Operations Manual for RPWS must be consulted for complete details."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = LP_DAC_1
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 28
BYTES = 1
DESCRIPTION = "Voltage on Langmuir probe cylinder DAC
when LP is selected as a signal source (see ANTENNA column).
Additional status from either housekeeping or a concurrent LP
data set is required to obtain the relay/multiplexer setting
in order to determine the actual voltage setting. The Users
Guide/Software Operations Manual for RPWS must be consulted
for complete details. (WFR only)"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = FSW_VER
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 29
BYTES = 1
DESCRIPTION = "Flight Software Version.
This value indicates which version of flight software was loaded into
the RPWS instrument when this data record was produced.
Valid values are as follows:
202 indicates FSW V2.2
203 indicates FSW V2.3
204 indicates FSW V2.4
205 indicates FSW V2.5
206 indicates FSW V2.6"
END_OBJECT = COLUMN
/* END OF RPWS_WBR_WFR_ROW_PREFIX.FMT */
RPWS_SCLK_SCET.FMT
(See Appendix D)
Appendix F: Sample labels for RPWS_WAVEFORM_FULL
Data Set Information Catalog File: WFFULLDS.CAT
PDS_VERSION_ID = PDS3
LABEL_REVISION_NOTE = "
2003-01-12, William Kurth (U. IOWA), initial;
2003-06-26, William Kurth (U. IOWA), general revision;
2004-02-10, William Kurth (U. IOWA), fixed liens;"
RECORD_TYPE = STREAM
OBJECT = DATA_SET
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0"
OBJECT = DATA_SET_INFORMATION
DATA_SET_NAME = "
CASSINI V/E/J/S/SS RPWS EDITED WAVEFORM FULL RES V1.0"
DATA_SET_COLLECTION_MEMBER_FLG = "N"
DATA_OBJECT_TYPE = TIME_SERIES
ARCHIVE_STATUS = IN_PEER_REVIEW
START_TIME = 1997-298T00:00:00.000Z
STOP_TIME = NULL
DATA_SET_RELEASE_DATE = 2003-06-30
PRODUCER_FULL_NAME = "DR. WILLIAM S. KURTH"
DETAILED_CATALOG_FLAG = "N"
DATA_SET_TERSE_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) edited full
resolution waveform (WFR) data set includes all waveform data for
the entire Cassini mission."
ABSTRACT_DESC = "
The Cassini Radio and Plasma Wave Science (RPWS) edited full
resolution data set includes all waveform data for the entire
Cassini mission. This data set includes uncalibrated values for
each waveform channel for each sensor for all times during the
mission including the second Venus flyby, the Earth flyby, the
Jupiter flyby, interplanetary cruise, and the entire Saturn tour.
Data for this data set are acquired from the RPWS Waveform
Receiver (WFR). Data are presented in a set of time series
organized so as to have fixed-length records for ease in data
handling. Data from the different WFR modes (i.e. 2.5-kHz and 26
Hz modes) are segregated into separate files. This data set
includes all waveform data acquired by the RPWS. A browse data
set is included with these data which provides for a graphical
search of the data using a series of thumbnail and full-sized
spectrograms which lead the user to the particular data file(s) of
interest. The waveform data provide the highest resolution data
from the RPWS instrument in the form of a set of waveform series
for these two bandwidths and can be used, when data from two
electric and three magnetic sensors are available, to perform
wave-normal analyses on various plasma wave phenomena. These data
can be used in their original time domain in order to look for
solitary features such as dust impacts or electrostatic solitary
waves. Or, they can be transformed into the frequency domain in
order to examine the detailed time and spectral evolution of
plasma waves or radio emissions or to do the wave-normal analysis.
Usually, this data set includes time series measurements from more
than one (up to five) sensors at a time and the samples are made
simultaneously for all five sensors."
CITATION_DESC = "Kurth, W.S., W.T. Robison, and L.J.
Granroth, CASSINI V/E/J/S/SS RPWS EDITED WAVEFORM FULL RES V1.0,
CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0, NASA Planetary Data
System, 2004."
DATA_SET_DESC = "
Data Set Overview
=================
The Cassini Radio and Plasma Wave Science (RPWS) edited full
resolution data set includes all waveform data for the entire
Cassini mission. This data set includes uncalibrated values for
each waveform channel for each sensor for all times during the
mission including the second Venus flyby, the Earth flyby, the
Jupiter flyby, interplanetary cruise, and the entire Saturn tour.
Data for this data are acquired from the RPWS Waveform Receiver
(WFR). Data are presented in a set of time series organized so as
to have fixed-length records for ease in data handling. Data from
the different WFR modes (i.e. 2.5-kHz and 26 Hz modes) are
segregated into separate files. This data set includes all waveform
data acquired by the RPWS. A browse data set is included with these
data which provides for a graphical search of the data using a
series of thumbnail and full-sized spectrograms which lead the user
to the particular data file(s) of interest. The waveform data
provide the highest resolution data from the RPWS instrument in the
form of a set of waveform series for these two bandwidths and can be
used, when data from two electric and three magnetic sensors are
available, to perform wave-normal analyses on various plasma wave
phenomena. These data can be used in their original time domain in
order to look for solitary features such as dust impacts or
electrostatic solitary waves. Or, they can be transformed into the
frequency domain in order to examine the detailed time and spectral
evolution of plasma waves or radio emissions or to do the
wave-normal analysis. Usually, this data set includes time series
measurements from more than one (up to five) sensors at a time and
the samples are made simultaneously for all five sensors.
Parameters
==========
This data set comprises time series of data numbers related to the
potential difference at the preamp input to the RPWS. The data
numbers can be calibrated with the use of supplied algorithms and
calibration factors to generate a time series of electric or
magnetic field waveforms in units of volts/meter or nanotesla.
Because the primary purpose of the WFR is to support wave-normal
analyses, the typical configuration of this receiver uses the
5-sensor combination mentioned above. The waveforms can be acquired
in one of two modes:
1. 2.5-kHz mode: 0.003 - 2.5 kHz, 140 microsecond sampling rate
2. 26-Hz mode: 1 - 26 Hz, 10 msec sampling rate
For each mode, one, two, three, or five individual sensors can be
selected. The samples are made simultaneously on each of the
sensors so as to preserve information on the phase relationships
between signals on the various sensors.
Typically, data are acquired in time series with length of a
multiple of 512 12-bit samples, usually with this length set to 2048
samples. For the 2.5-kHz mode, this results in time series of
duration about 287 msec and for the 26-Hz mode, the duration of the
waveform series is typically about 20 s. A new waveform series can
be acquired as often as once per approximately 20 seconds but
typically once every several minutes. Hence, the duty cycle for
this mode can be very small (e.g. 287 msec out of 300 sec or about
0.1 percent for the 2.5 kHz mode or about 7 percent for the 26-Hz
mode) with typical sample lengths. In some instrument modes the WFR
is exercised at a much higher duty cycle, at rates of once or twice
per minute, improving the duty cycle considerably.
Processing
==========
Data in this data set were processed by the use of a number of
software programs which assemble segmented mini-packets in the raw
telemetry packets into complete sets and de-compress the data that
were compressed by one of several possible onboard compression
schemes. These data may be calibrated using supplied calibration
factors and algorithms as well as sample code provided.
Data
====
The RPWS full resolution waveform data set is organized by receiver
mode and time series sample length in order to use files with fixed
record lengths. Each time series is a record in a file with header
information on time, sensor, and receiver gain (required for
calibration). Separate files will be maintained for each instrument
mode and sample length.
Ancillary Data
==============
Ancillary data included with this data set collection include a
series of files that describe the modes of the RPWS as a function of
time and provide a time- ordered listing of Instrument Expanded
Block (IEB) trigger commands (the mode by which the RPWS is
reconfigured). Also a detailed description of each of the modes (or
IEBs) is provided.
Other data which are ancillary to this data set but which are
archived separately from this collection are the Navigation and
Ancillary Information Facility's SPICE kernels describing the
position and attitude of Cassini and various solar system bodies as
a function of time.
Coordinate System
=================
The data in this data set are measurements of wave electric and
magnetic fields measured by the RPWS electric and magnetic sensors.
These fields are presented as detected by the sensors and are not
rotated into any other coordinate system. If desired the SPICE
kernels can be used with the SPICE toolkit to convert from the
spacecraft frame to virtually any frame which may be of use in
analyzing these data. However, for many purposes, the wave
amplitudes are extremely useful and may be entirely adequate with no
coordinate transformations at all. Wave normal analysis typically
requires that the wave data and vector magnetic field from the
MAGNETOMETER instrument be used in a common coordinate system.
Software
========
Sample code is provided with these data which demonstrates how to
read these files in order to build a set of waveform time series.
Algorithms and sample code are provided which convert from data
number to either electric or magnetic field strength (units of
volt/meter or nanotesla). The sample code and algorithms are found
in the EXTRAS/SOFTWARE directory. A description of how to access
and calibrate these data is included in WBRWFR.TXT in the DOCUMENT
directory. Also see the RPWSCAL document in the same directory.
Media/Format
============
These data are supplied to the Planetary Data System on DVD-R media
using formats and standards of the PDS for such media."
CONFIDENCE_LEVEL_NOTE = "
Confidence Level Overview
=========================
This data set contains all waveform data for the Cassini RPWS
instrument for the interval described in the product label files.
Every effort has been made to ensure that all data returned to JPL
from the spacecraft is included and that the calibration information
is accurate.
Review
======
The RPWS full resolution waveform data will be reviewed internally
by the Cassini RPWS team prior to release to the PDS. The data set
will also be peer reviewed by the PDS.
Data Coverage and Quality
=========================
All data in the stated interval are included, to the best of our
knowledge and attempts to determine completeness. In general, these
data were acquired during early tour for the following intervals:
1. Antenna deployment 1997-10-25T00:00 - 1997-10-26T05:30
2. Instrument Checkout 1998-12-30T09:10 - 1999-01-19T05:40
3. Venus 2 flyby 1999-06-24T09:08 - 1999-06-24T21:20
4. Earth flyby 1999-08-13T17:39 - 1999-09-14T22:20
*Actual interval for science data is much shorter than this.
Beginning in February of 2000 the instrument was operated
more-or-less continuously; two gaps of the order of six weeks were
incurred for the purposes of loading new attitude control and
command and data system flight software, gaps of a few days each
were incurred approximately twice per year because of Huygens Probe
testing, and gaps of several days in duration occurred during solar
conjunction periods prior to 2002. Remaining gaps are due to
spacecraft anomaly resolution or simply to downlink gaps, some of
which were imposed by limitations on DSN station availability.
During the time interval after February 2002, the wideband data were
acquired during such times when the onboard solid state recorder and
the downlink capability could support the high data volumes required
for these data. Typically, waveform data are not acquired during
the interplanetary cruise phase. However, they are acquired more
regularly at low duty cycles during tour and near some of the
planetary flybys en route. A user would find events of interest in
the more continuous low rate data and consult the ancillary sequence
information provided to determine the existence of waveform data in
an appropriate mode for that event. Further, a graphical browse
data set is supplied with the archive to allow the user to look at
frequency-time spectrograms directly in order to find events or
phenomena of interest. This browse system will point the user to
the data files containing the data of interest.
Limitations
===========
None known at this time."
END_OBJECT = DATA_SET_INFORMATION
OBJECT = DATA_SET_TARGET
TARGET_NAME = VENUS
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = EARTH
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = JUPITER
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SATURN
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_TARGET
TARGET_NAME = SOLAR_SYSTEM
END_OBJECT = DATA_SET_TARGET
OBJECT = DATA_SET_HOST
INSTRUMENT_HOST_ID = CO
INSTRUMENT_ID = RPWS
END_OBJECT = DATA_SET_HOST
OBJECT = DATA_SET_REFERENCE_INFORMATION
REFERENCE_KEY_ID = "GURNETTETAL2004"
END_OBJECT = DATA_SET_REFERENCE_INFORMATION
END_OBJECT = DATA_SET
END
Sample RPWS_WAVEFORM_FULL Label File
PDS_VERSION_ID = PDS3
/* File characteristics */
RECORD_TYPE = FIXED_LENGTH
RECORD_BYTES = 2080
FILE_RECORDS = 19
DESCRIPTION = "T1999230_2_5KHZ2_WFRFR.DAT contains Cassini
Radio and Plasma Wave (RPWS) waveform data for the time period between
1999-230T00:00:00.000 and 1999-231T00:00:00.000 that includes the
following targets: EARTH,
SOLAR SYSTEM."
/* Data object pointers */
^WFR_ROW_PREFIX_TABLE = ("T1999230_2_5KHZ2_WFRFR.DAT", 1)
^TIME_SERIES = ("T1999230_2_5KHZ2_WFRFR.DAT", 1)
/* Identification */
DATA_SET_ID = "CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0"
DATA_SET_NAME = "
CO V/E/J/S/SS RPWS 2 REFDR WFR FULL RESOLUTION V1.0"
PRODUCT_ID = "T1999230_2_5KHZ2_WFRFR_V1"
PRODUCT_CREATION_TIME = 2004-03-03
START_TIME = 1999-230T00:00:00.000Z
STOP_TIME = 1999-231T00:00:00.000Z
SPACECRAFT_CLOCK_START_COUNT = "1/1313626007:150"
SPACECRAFT_CLOCK_STOP_COUNT = "1/1313712408:040"
NATIVE_START_TIME = -11793535.817
NATIVE_STOP_TIME = -11707135.817
NOTE = "NATIVE_TIME is NAIF 'et' (ephemeris
time or barycentric dynamical time) as used in the spice kernel."
PRODUCT_TYPE = DATA
STANDARD_DATA_PRODUCT_ID = RPWS_WAVEFORM_FULL
MISSION_PHASE_NAME = {"EARTH ENCOUNTER",
"INTERPLANETARY CRUISE",
"VENUS 2 - EARTH CRUISE"}
TARGET_NAME = {"EARTH",
"SOLAR SYSTEM"}
SOFTWARE_VERSION_ID = "RPWS_HR_AR V5.3"
/* Instrument description */
INSTRUMENT_HOST_NAME = "CASSINI ORBITER"
INSTRUMENT_HOST_ID = CO
INSTRUMENT_NAME = "RADIO AND PLASMA WAVE SCIENCE"
INSTRUMENT_ID = RPWS
SECTION_ID = WFR
/* Data Object Structure */
/**************************************************************/
/* 1 32 33 x1 x2 */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* 1 | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* | | | | */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* 2 | | | | */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* 3 | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* | | | | */
/* +---------------------+---------------------+-------+ */
/* . . . */
/* +---------------------+---------------------+-------+ */
/* | | | | */
/* y | ROW_PREFIX_TABLE -->| TIME_SERIES ------->| SPARE | */
/* | | | | */
/* +---------------------+---------------------+-------+ */
/* */
/* 8-bit octet are numbered across the top. */
/* No header records, all records are in the */
/* same format. */
/* Record Number is down the left edge. */
/* */
/* x1 is ROW_BYTES+32 (ITEMS) */
/* x2 is RECORD_BYTES */
/* y is FILE_RECORDS (ROWS) */
/* */
/**************************************************************/
/* Record header */
OBJECT = WFR_ROW_PREFIX_TABLE
NAME = WFR_ROW_PREFIX_TABLE
INTERCHANGE_FORMAT = BINARY
ROWS = 19
COLUMNS = 19
ROW_BYTES = 32
ROW_SUFFIX_BYTES = 2048
DESCRIPTION = "This table describes the structure of the
record header attached to each row of time series data."
^STRUCTURE = "RPWS_WBR_WFR_ROW_PREFIX.FMT"
END_OBJECT = WFR_ROW_PREFIX_TABLE
/* Data samples */
OBJECT = TIME_SERIES
NAME = WFR_TIME_SERIES
INTERCHANGE_FORMAT = BINARY
ROWS = 19
COLUMNS = 1
ROW_BYTES = 2048
ROW_PREFIX_BYTES = 32
SAMPLING_PARAMETER_NAME = TIME
SAMPLING_PARAMETER_UNIT = SECOND
SAMPLING_PARAMETER_INTERVAL = 0.000140
DESCRIPTION = "This time series consists of
uncalibrated samples gathered during a 24 hour time span from one
or more detectors. Time interval between TIME_SERIES is
variable."
OBJECT = COLUMN
NAME = WFR_SAMPLE
DATA_TYPE = MSB_UNSIGNED_INTEGER
START_BYTE = 33
BYTES = 2048
ITEMS = 1024
ITEM_BYTES = 2
OFFSET = -2047.5
VALID_MINIMUM = 0
VALID_MAXIMUM = 4095
DESCRIPTION = "The 16-bit unsigned uncalibrated
waveform samples range from 0 to 4095. Zero
amplitude is nominally 2047.5 with 2047 being just
below and 2048 just above zero amplitude."
END_OBJECT = COLUMN
END_OBJECT = TIME_SERIES
END
RPWS_WBR_WFR_ROW_PREFIX.FMT
(See Appendix E)
RPWS_SCLK_SCET.FMT
(See Appendix D)
Appendix G: Sample Index Labels
INDEX.LBL
PDS_VERSION_ID = PDS3
/************************/
/* File Characteristics */
/************************/
RECORD_TYPE = FIXED_LENGTH
RECORD_BYTES = 272
FILE_RECORDS = 1025
/************************/
/* Data object pointers */
/************************/
^INDEX_TABLE = ("INDEX.TAB",2)
/******************/
/* Identification */
/******************/
VOLUME_ID = CORPWS_0002
DATA_SET_ID = { "CO-V/E/J/S/SS-RPWS-4-SUMM-KEY60S-V1.0",
"CO-V/E/J/S/SS-RPWS-2-REFDR-ALL-V1.0",
"CO-V/E/J/S/SS-RPWS-3-RDR-LRFULL-V1.0",
"CO-V/E/J/S/SS-RPWS-2-REFDR-WBRFULL-V1.0",
"CO-V/E/J/S/SS-RPWS-2-REFDR-WFRFULL-V1.0" }
PRODUCT_CREATION_TIME = 2003-12-19
MISSION_NAME = "CASSINI-HUYGENS"
SPACECRAFT_NAME = "CASSINI ORBITER"
TARGET_NAME = {"EARTH",
"SOLAR SYSTEM"}
MISSION_PHASE_NAME = {"EARTH ENCOUNTER",
"INTERPLANETARY CRUISE",
"VENUS 2 - EARTH CRUISE"}
DESCRIPTION = "INDEX.TAB is an index of all of the PDS
label files corresponding to all of the archived Cassini RPWS
data on this volume. The first line of the index file contains
individual OBJECT names from the OBJECT=INDEX_TABLE that follows.
Some of these names may be truncated to fit the defined column
width."
SOFTWARE_VERSION_ID = "P3.6/L2.5"
/*************************/
/* Data Object Structure */
/*************************/
OBJECT = INDEX_TABLE
INTERCHANGE_FORMAT = ASCII
ROWS = 1025
ROW_BYTES = 272
COLUMNS = 9
INDEX_TYPE = SINGLE
DESCRIPTION = "The following fields are
extracted from the individual label files on this
and previous volumes."
OBJECT = COLUMN
NAME = VOLUME_ID
DATA_TYPE = CHARACTER
START_BYTE = 2
BYTES = 11
DESCRIPTION = "Volume ID in the form CORPWS_0nnn.
In the CUMINDEX.TAB this identifies the volume on which
the indicated dataset resides."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = STANDARD_DATA_PRODUCT_ID
DATA_TYPE = CHARACTER
START_BYTE = 16
BYTES = 20
DESCRIPTION = "The general data product name"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = DATA_SET_ID
DATA_TYPE = CHARACTER
START_BYTE = 39
BYTES = 40
DESCRIPTION = "The data set ID from the label"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = PRODUCT_ID
DATA_TYPE = CHARACTER
START_BYTE = 82
BYTES = 30
DESCRIPTION = "The data product ID"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = START_TIME
DATA_TYPE = TIME
START_BYTE = 115
BYTES = 22
DESCRIPTION = "Spacecraft Event Time (SCET) of the
begining of the period in the form yyyy-dddThh:mm:ss.sssZ"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = STOP_TIME
DATA_TYPE = TIME
START_BYTE = 140
BYTES = 22
DESCRIPTION = "Spacecraft Event Time (SCET) of the
end of the period in the form yyyy-dddThh:mm:ss.sssZ"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = SPACECRAFT_CLOCK_START_COUNT
DATA_TYPE = CHARACTER
START_BYTE = 165
BYTES = 16
DESCRIPTION = "Spacecraft Clock (SCLK) of the
begining of the period in the form p/ssssssssss:fff
where:
p indicates the partition number;
ssssssssss is the SCLK second counter;
fff is the SCLK fine counter (256 counts per second)"
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = FILE_SPECIFICATION_NAME
DATA_TYPE = CHARACTER
START_BYTE = 184
BYTES = 73
DESCRIPTION = "POSIX-compliant full path to the PDS label
file that describes the binary file containing instrument data.
The path is relative to the root of the archive volume."
END_OBJECT = COLUMN
OBJECT = COLUMN
NAME = PRODUCT_CREATION_TIME
DATA_TYPE = TIME
START_BYTE = 260
BYTES = 10
DESCRIPTION = "Product creation date"
END_OBJECT = COLUMN
END_OBJECT = INDEX_TABLE
END
Appendix H. Sample Ancillary Files
Example Mode (IEB Trigger) Summary Table for the C15 Sequence
PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2003-06-20
NOTE = "
ESB_IEB.TXT describes the set of Instrument Expanded Blocks (IEBs)
and individual commands used in the Earth Swing-By (ESB) sequence,
and also a short description of each."
END_OBJECT = TEXT
END
C15 (ESB) RPWS Triggers
Trigger 0
Power On All Receivers (HFR, MFR, LP, WFR, WBR)
Trigger 1
Internally defined Basic Mode with HFR "Composite Mode Survey" (CMS)
For more info, see TRIG_01.TXT
Trigger 28
200 bps Interplanetary Cruise with Direction Finding on HFR Bands ABC
For more info, see TRIG_28.TXT
Trigger 80
1 kbps Direction-Finding Survey with 2.5 KHz WFR
For more info, see TRIG_80.TXT
Trigger 8C
Earth Swing-By: AKR Polarization, Fast 2.5KHz WFR, 10KHz WBR (~30 kbps)
For more info, see TRIG_8C.TXT
Trigger 90
2 kbps Magnetotail Basic Survey with 2.5 KHz WFR
For more info, see TRIG_90.TXT
Trigger 92
Earth Swing-By: Sounder Checkout (~500 bps)
For more info, see TRIG_92.TXT
Trigger 94
Earth Swing-By: Langmuir Probe Checkout (~30 kbps)
For more info, see TRIG_94.TXT
C15 RPWS Commands
73PS_RPWS,OFF
Power RPWS off
73PS_RPWS,ON
Power RPWS on
73RT_SLEEP,ACTIVE
ACTIVE MODE: Processors awake, ready to power up Receivers
73RT_SLEEP,SLEEP
SLEEP MODE: Receivers powered off, Processors low-power mode
73MEM_TWEAK,HRP,BYTE,0x0052,0x0082,W08I
Prepare WBR to use EZ sensor
73IEB_LOAD
Load Internal Expanded Block (IEB) memory
73WRAP,(0x4310,0x1500)
Perform Checksum on newly loaded IEB memory
73MEM_TWEAK,LRP,BYTE,0x0014,0x00C0,TWEK
Command needed for IEB verification via memory readout
73MRO,LRP,HSK,8000,800F
Command needed for IEB verification via memory readout
73MRO,LRP,HSK,BF00,BF1C
Command needed for IEB verification via memory readout
73MEM_TWEAK,LRP,BYTE,0x0014,0x0040,TWEK
Command needed for IEB verification via memory readout
73WFR_MODE_CNTL,HOLD,LBAND,NOCOMPRESS
Set WFR Band to the 1-25 Hz mode (i.e., Low Band)
Example Time Ordered Listing of RPWS commands in the C15 Sequence
1999-225T17:38:00.000 "73PS_RPWS,ON "
1999-225T17:40:00.000 "73RT_SLEEP,ACTIVE "
1999-225T17:43:00.000 "TRIGGER 0 "
1999-225T17:43:30.000 "73MEM_TWEAK,HRP,BYTE,0x0052,0x0082,W08I "
1999-225T17:44:00.000 "TRIGGER 1 "
1999-225T17:44:31.000 "73IEB_LOAD GEO IEB "
1999-225T17:44:52.000 "73WRAP,(0x4310,0x1500) "
1999-225T17:45:52.000 "73MEM_TWEAK,LRP,BYTE,0x0014,0x00C0,TWEK "
1999-225T17:46:02.000 "73MRO,LRP,HSK,8000,800F "
1999-225T17:46:12.000 "73MRO,LRP,HSK,BF00,BF1C "
1999-225T17:46:52.000 "73MEM_TWEAK,LRP,BYTE,0x0014,0x0040,TWEK "
1999-230T01:33:10.000 "TRIGGER 8C "
1999-230T02:50:10.000 "TRIGGER 92 "
1999-230T03:25:02.000 "TRIGGER 94 "
1999-230T05:23:10.000 "TRIGGER 80 "
1999-237T06:30:00.000 "TRIGGER 28 "
1999-243T02:30:00.000 "73RT_SLEEP,SLEEP "
1999-244T03:10:00.000 "73RT_SLEEP,ACTIVE "
1999-244T03:10:30.000 "TRIGGER 0 "
1999-244T03:11:00.000 "TRIGGER 28 "
1999-254T16:31:00.000 "TRIGGER 90 "
1999-255T22:00:00.000 "73WFR_MODE_CNTL,HOLD,LBAND,NOCOMPRESS "
1999-257T21:40:00.000 "73PS_RPWS,OFF
Example Description of Mode (IEB Trigger) 80 as implemented in the C15 Sequence
PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
PUBLICATION_DATE = 2003-06-20
NOTE = "
TRIG_80.TXT describes the RPWS instrument configuration for the
High Frequency Receiver (HFR), the Medium Frequency Receiver (MFR),
the Low Frequency Receiver (LFR), the Waveform Receiver (WFR), the
Wideband Receiver (WBR), the Langmuir Probe (LP), the Sounder, and
the onboard Dust detection algorithm when using Trigger 80."
END_OBJECT = TEXT
END
Sequence: C15 (ESB)
Trigger 80 (Direction-Finding Survey)
This mode is designed to provide a Survey with fast temporal resolution
and standard spectral resolution for periods during Earth Swing-by.
Periodic Waveform measurements are made. The entire RPWS frequency range
(1 Hz - 16 MHz) is covered.
Receiver Frequency Range Sensors Time between Snapshots
-------- ---------------- -------------- ----------------------
LFR 1 - 25 Hz EX, BX 32 seconds
MFR 25 Hz - 12 KHz EW, BZ 32 seconds
HFR 3.6 KHz - 16 MHz EU, EV, EW 32 seconds
WFR .1 - 2.5 KHz EX,EW,BX,BY,BZ 320 seconds
The HFR is in direction-finding mode for its entire frequency range from
3.6 KHz to 16 MHz. Thus, measurements are made on all three monopoles EU,
EV and EW.
This mode is defined by:
Correlations Channels Integ. Size Frequency
Band Ant. Auto- Cross- per Band df Period Rep Steps kHz Start - Stop
---- ---- ----- ------ -------- -- ------ --- ----- ---- ------------
ABC 2E y y 8 y 250 1 3.6-319 kHz
H1 2E y y 1 y 80 1 76 50 325k-4.1MHz
H2 2E y y 1 y 80 1 61 200 4.0M-16MHz
Bands ABC require 1.69 sec to complete, H1 requires 13.06 sec, and H2 requires
10.50 sec for a total of 25.25 sec per sweep. However, to allow time for LFR
and MFR snapshots to occur without interference, one complete sweep is done
every 32 seconds. To avoid the interference from the DF mode, the MFR uses
the EW antenna.
Appendix I. Acronym List
CAS Cassini
CETP Centre d'etudes des Environnements Terrestre et Planetaires
CODMAC Committee on Data Management and Computation
DVD Digital Versatile Disk
HFR High frequency receiver
HTML Hypertext markup language
JPL Jet Propulsion Laboratory
LFR Low frequency receiver
MAPS Magnetosphere and Plasma Science
MFDR Medium frequency digital receiver
MFR Medium frequency receiver
NASA National Aeronautics and Space Administration
NSSDC National Space Science Data Center
PDS Planetary Data System
PNG Portable Network Graphics
PPI Planetary Plasma Interactions
RPWS Radio and Plasma Wave Science
SCET Spacecraft event time
SCLK Spacecraft clock
SIS Software Interface Specification
UCLA University of California, Los Angeles