Subject: Re: COSPAR 2002 Abstract on Triggered Emissions Date: Sun, 08 Sep 2002 19:02:30 -0400 From: Zong To: Jolene Pickett CC: Mark.L.Adrian@msfc.nasa.gov, pdecreau@cnrs-orleans.fr, patrick.canu@cetp.ipsl.fr, ondrej.santolik@mff.cuni.cz, amasson@so.estec.esa.nl, harri.laakso@esa.int, ".jolene pickett" , mohammed.boudjada@oeaw.ac.at, bell@nova.stanford.edu, fritz@bu-ast.bu.edu, nicole.cornilleau@cetp.ipsl.fr, Mats.Andre@irfu.se, zong@bu.edu Dear Jolene and all, Please find two plots in attachments for March 25, 2002 event. I have checked all events in your lists, only this one, our RAPID (Ion and electron sensor) have data for all spacecraft. This day was in the recovery phase of a strong storm (Maximum Dst was =- 101 nT). In the time period of interest, however, geomagnetic activity is rather small, the dst index was -24 nT, and Kp index is 2-. There was not substorm activity observed by the LANL Geosynchnorous satellite (see the attachment) although the ring current was not completely fade out (Dst index was still -24 nT). As we can we can see from the plot ( attachment: 0325_sall4.pdf) all cluster s/c started from the south hemisphere, arossed the magnetic equator between 14:00 and 14:20, finally entered into the north hemisphere In that time period, the L shell was around 4.4, the largest electron flux was observed (1.2 X10^7), whereas the proton flux was dropped to a lower lever. This is probably because the ring current (ions) is fadding away and the maximum part of the ring current (Ions) is moved from the smaller L layer to the larger ones during the recovery phase of this magnetic storm. The proton fluxes in the equator region obtained by the RAPID were between 2 and 4 x 10 ^6, this is almost one order lower than the electrons. Although the seperation of the S/C was quite small (between 80 to 250 km), the flux difference for both electron and ion is rather significant. The second plot (attachment 0325_sall4a.pdf) show 20 min data from 14:10 to 14:30. As we can seen, both electron and ion fluxes are pretty flutuated with 10 -20 % amplitude. I hope those helps. Zong THis is what I have at hand right now. Just a start .. I am certain Patrick and Arnaud will be able to help you in this. Asd you know, we will be busy with the Cluster workshop of week 17-20 Sept. But we are all interested with those nice plasmasphere events ... About your other mail, I agree with your view. Manything to say, or rather still to explore, on the S/C wrt medium interactions. It is a vast field ... I am myself willing to explore a little more. Best whishes, Zong Jolene Pickett wrote: > Dear Pierrette, Patrick, Mark, Ondrej, Zong, Arnaud and Harri, > > I have finally decided on the events that I would like to present during > my invited Cluster/IMAGE talk at COSPAR, for which you are all > Co-authors. There are four events chosen, but I will probably only > have time to touch on 3 of them. The decision for which 3 will be > made after I have had time to analyze our data in conjunction with > yours. Recall that the topic of this talk is triggered emissions observed > near Cluster's perigee. These wave emissions are fine structured rising, > falling, hooked, etc. and probably fall in the "chorus" category. The > four events are: > > July 9, 2001, 0550-0615, WBD data for s/c 2 and 4 > Oct. 25, 2001, 2230-2400, WBD data for s/c 1, 2 and 4 > Mar. 11, 2002, 0727-0803, WBD data for all 4 s/c > March 25, 2002, 1410-1430, WBD data for all 4 s/c > > The first two have large spacecraft separations, while the latter two > have small separations. All but the Mar. 11, 2002 events were on > my preliminary list of events sent to you in May following submission > of the abstract. Here is what I need from each of you: > > Pierrette and Patrick: Densities, spectrograms, determination of location > of spacecraft with respect to > plasmapause > > Mark: IMAGE EUV data as close to the time periods shown with the output > similar to what Dennis has given Ondrej recently. Also, an > explanation of the data and implications. Any other pertinent > IMAGE data? > > Ondrej: Analysis of the STAFF_SA March 25, 2002 data (I think you > have given me the rest? > > Zong: RAPID data for all events with explanation of the plots. I think > you have given me some data for the 2001 events, but I have > nothing for the 2002 events. Also, I have little in the way of > explanation of the plots I already have. I do not want to > misinterpret the RAPID data, so be generous with the > explanations > if you have the time. > > Arnaud and Harri: S/C potential data converted to density units for all > events. I believe this region should lend > itself well > to s/c potential as a proxy for density. > I'm hoping to > compare these to the Whisper sounder > measurements. > Note: you previously gave me plots of most > of these > time periods, but with no indication of > density values. > > I realize that it is slightly over one month until the meeting and this is > short > notice to ask you for all of these data. If your time only permits you to > do > a subset of the above events, that will be fine. > > Many thanks for your participation in this work. As most of you already > know, the Cluster perigee passes are ideal for studying the region near > the plasmapause. > > Best regards, > > Jolene > > ".jolene pickett" wrote: > > > >> Dear Colleagues, >> >> I finally managed to get the attached abstract (file in Microsoft Word >> format) submitted to COSPAR02. I have incorporated most of the >> changes that some of you suggested, especially correcting VLV to >> VLF. If you have any further changes, please let me know as soon >> as possible. I will be leaving for Germany on this coming Sunday, >> arriving in the afternoon of Monday, May 13, which is the deadline f >> or all changes to be made to COSPAR abstracts. I assume I would >> have a chance on Monday afternoon to make any necessary changes. >> >> You will see that I submitted the abstract to D3.1, which is the >> multipoint and remote sensing session. This is an invited talk. >> Also note that because I have more than 10 authors, I had to use >> the "Team" approach in stating the authors. Thus, I have named >> our team "The Cluster/Image Inner Magnetosphere Team". Thank >> you for your help. >> >> Best regards, >> >> Jolene >> >> >> ---------------------------------------------------------------------------------------------------- >> Name: cospar2002_abstract.doc >> cospar2002_abstract.doc Type: WINWORD File (application/msword) >> Encoding: base64 >> >> > > > > -- _____________________________________________________ "Zong" Q.-G. Zong, Center for Space Physics, Boston University 725 Commonwealth Avenue, Boston, Massachusetts 02215 Tel:617 353 7448, Fax:617 353 6463, Room: 501 http://people.bu.edu/zong/ Name: 0325_sall4.pdf 0325_sall4.pdf Type: Portable Document Format (application/pdf) Encoding: base64 Name: 0325_sall4a.pdf 0325_sall4a.pdf Type: Portable Document Format (application/pdf) Encoding: base64 Name: 20020325_LANL_GEO_LoE_00-24.ps 20020325_LANL_GEO_LoE_00-24.ps Type: Postscript Document (application/postscript) Encoding: 7bit