GALILEO PWS CALLISTO 10 OBSERVATION PLANNING

What's new (26 July 1995)

An overview of the C10 encounter period

Orbit geometry

And 1-day summaries for greater detail:

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Magnetospheric Survey, R > 50 Rj

Spectrum Analyzer Mode:

• Antenna: Cycle (toggles between E and B every 18.67 s)

Wideband Mode: (This is mostly irrelevant since little or no wideband data will be obtained in the Magnetospheric Survey--only occasional fill data)

• Antenna: E
• Mode: 1 (10 kHz)

Magnetospheric Survey, R < 50 Rj

Encounter Geometry

Spectrum Analyzer Mode:

• Antenna: Cycle (toggles between E and B every 18.67 s)

Wideband Mode: (This is mostly irrelevant since little or no wideband data will be obtained in the Survey--only occasional fill data and data which is automatically recorded with remote sensing recorded observations)

• Antenna: E
• Mode: 2 (80 kHz)

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Perijove/Magnetic Equator

Record for ~45 minutes beginning at about 22:38 on day --- (18 September) 1997 at a distance of ~ 9.2 Rj. Here is the geometry for this observation.

Record LPW from 97-Day ---, 18 September/22:37:30 - 22:52:30
Record MPP from 97-Day ---, 18 September/22:52:30 - 23:07:30
Record LPW from 97-Day ---, 18 September/23:07:30 - 23:22:30

Spectrum Analyzer Mode:

• Antenna: Cycle (toggles between E and B every 18.67 s)

Wideband Mode:

• Antenna: 4 minutes E, followed by 1 minute B (looper)
• Mode: 3 (1 kHz)

Playback Strategy:

Return LPW (Golay) wideband data at rate of 2:1 by returning every other waveform snapshot. Return 3 minutes of MPP at 1:1 based on review of RTS data.

Callisto Closest Approach

Closest approach wake crossing geometry

Record LPW for ~60 minutes beginning at about 23:52 on day --- (16 September) 1997.

Record LPW from 97-Day --- (16 September)/23:52:00 - 
                   Day --- (17 September)/00:52:00 

Spectrum Analyzer Mode:

• Antenna: Cycle (toggles between E and B every 18.67 s)

Wideband Mode:

• Antenna: Toggle E and B once per 18.67 sec (28 mf) (Note: the E/B looper has to be constructed in such a way as to have an integer number of steps per RIM or 2-RIM pair, and must have an integer number of 14-mf steps to assure that the commands are executed on the appropriate (odd or even?) mf--as we did in the Io torus.)
• Mode: 1 (10 kHz)

Playback Strategy:

Return LPW (Golay) wideband data at a rate of 2:1 by sending back every other waveform snapshot.

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william-kurth@uiowa.edu