Press Release

Mars Global Surveyor Status Report 19 Apr 2000

By SpaceRef Editor
April 19, 2000
Filed under

Wednesday, April 19, 2000 (DOY 0103/19:00:00 to DOY 0110/19:00:00 UTC)
Launch / Days since Launch = Nov 7, 1996 / 1260 days
Start of Mapping / Days since Start of Mapping = April 1, 1999 / 384 days Total Mapping Orbits = 4992
Total Orbits = 6595
Recent Events:
The spacecraft continues to operate nominally in performing the beta supplement daily recording and transmission of science data. The mm030 sequence executed successfully from 00-104 (4/13/00) through 00-107 (4/16/00). The mm031 sequence also successfully executed from 00-108 (4/17/00) through 00-110 (4/19/00). The mm032 sequence was successfully uplinked on 00-108 (4/17/00) and will begin execution on 00-111 (4/20/00).
A retry of the two missed MOC focus star scans is scheduled for 4/28 and 4/30. The second attempts will utilize an updated scan attitude to account for the gyro bias error propagated when the IMU is switched from low rate to high rate mode for the slews.
Spacecraft Health:
All subsystems are reporting nominal health.
There have been 11 uplinks to the spacecraft during the last week, including new star catalogs and ephemeris files, instrument command loads, and the mm032 and mm033 sequences. Total command files radiated to the spacecraft since launch is 4592.
Upcoming Events:
A bistatic radar experiment, in which the Spacecraft signal will be reflected off the Martian surface to Earth, is on schedule for execution on 5/14/00, upon Project approval expected next week.
The implementation of the first Radio Science occultation egress scans, replacing the previous fixed-HGA periods for obtaining occultation egress data, are also on schedule for execution on 5/20-5/22/00.

SpaceRef staff editor.