Mars Global Surveyor Status 10 Apr 2002
Wednesday, April 10, 2002 (DOY 093/19:00:00 to DOY 100/19:00:00 UTC)
Launch / Days since Launch = Nov. 7, 1996 / 1981 days
Start of Mapping / Days since Start of Mapping = April 1, 1999 / 1105 days
Total Mapping Orbits = 13,809
Total Orbits = 15,492
Recent Events:
Background Sequences – We have recovered MGS from C-Mode. It is nadir pointed with downlink communications through the HGA. An on-board script that is triggered every time the spacecraft emerges from solar eclipse is controlling HGA movement and TWTA cycling. The mm168 background sequence begins tonight at 23:57:00 SCET UTC on 02-101 (4/10/02). It will return the spacecraft to the relay-16 attitude and commence normal operations.
Other – All on-board recorded data have been played back. A STAREX flight software patch has been uplinked to prevent attitude knowledge from being corrupted if star processing is reset while MGS is pointed off-nadir. The MOC has been powering up and is imaging MARS.
No ROTOs were accomplished this week. MGS has completed 235 ROTOs t
o date.
Spacecraft Health:
All spacecraft subsystems report good health and status.
Uplinks:
There have been 60 uplinks to the spacecraft during the past week, including C-mode recovery commands, new star catalogs and ephemeris files, instrument command loads, STAREX flight software patch, the mz168 return to nadir mini-sequence, the mz169 data playback mini-sequence, the mm168 background sequence, and the mz170 science instrument turn-on minisequence. 6,561 command files have been radiated to the spacecraft since launch.
Upcoming Events:
The MOLA, MAG/ER, and TES science instruments will be powered on 02-101 (4/10/02).
