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Lunar Prospector Status Report #35

June 05, 1998 - 1:00 p.m. EST (10:00 a.m. PST)

The Lunar Prospector spacecraft continues to perform very well.

Current spacecraft state (0000 GMT 6/5/98):

Orbit: 1751
Downlink: 3600 bps
Spin Rate: 11.96 rpm

Spin Axis Attitude (ecliptic):
Latitude: 87.0 deg
Longitude: 132 deg

Trajectory:
Periapsis Alt: 90.0 km
Apoapsis Alt: 108.2 km

Inclination: 90.8 deg
Period: 118 min
Occultations: 47 minutes
Eclipses: 31 minutes

On DOY 145 (5/25), Face #5 of the APS began intermittently showing problems with noise saturating the instrument (as was seen on Face #3 about a week before that). On DOY 153 (6/2), commands were sent to investigate whether there was noise leakage between these two faces. Nothing definitive was found and the current configuration is that both Face #3 and Face #5 are commanded off. A total of 8 commands were transmitted.