GALILEO PWS EUROPA 11 OBSERVATION PLANNING

What's new (26 July 1995)

An overview of the E11 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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Europa Closest Approach/Perijove Part 1

Record for ~132 minutes beginning at about 21:26 on day 310 (6 November) 1997 at a distance of ~ 9.4 Rj and a magnetic latitude of 5.9 degrees.

Europa Closest Approach occurs at 21:49 at about 9.35 Rj.

Magnetic Equator Crossing occurs at 22:40 at about 9.24 Rj.

Recording Ends at 23:38 at 9.17 Rj and -4.8 degrees magnetic latitude.

Here is the geometry for this observation.

Record LPW from 97-Day 310, 7 November/21:26:__ - 23:38:__

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: ? (? kHz)

Playback Strategy:

Return LPW (Golay) wideband data at rate of 4:1 by returning every 4th waveform snapshot.

Europa L-shell crossing and Perijove Part 2

Here is the geometry for this observation.

Record LPW for ~60 minutes beginning at about 04:00 on day 311 (7 November) 1997 at about 9.33 Rj and a magnetic latitude of -4.0 degrees.

Cross Europa's radial distance at about 04:10 at 9.35 Rj.

Cross magnetic equator at about 04:48 at 9.44 Rj.

End recording at about 05:00 at 9.47 Rj at a magnetic latitude of 1.0 deg.

Record LPW from 97 Day 311 (7 November)/04:00:__ - 05:00:-__ 

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: ? (? kHz)

Playback Strategy:

Return LPW (Golay) wideband data at a rate of 4:1 by sending back every 4th waveform snapshot.