Mars Global Surveyor Status Report 21 Feb 2001

Mars Global Surveyor Status Report

Wednesday, February 21, 2001 (DOY 045/19:00:00 to DOY 052/19:00:00 UTC)

Launch / Days since Launch = Nov. 7, 1996 / 1568 days

Start of Mapping / Days since Start of Mapping = April 1, 1999 / 692 days

Total Mapping Orbits = 8,759

Total Orbits = 10,442

Recent Events:

Background Sequences — The spacecraft continues to operate nominally in
performing the beta-supplement daily recording and transmission of science
data. The mm114 sequence executed successfully from 01-046 (2/15/00) through
01-048 (2/17/01). The mm115 sequence has performed well since it started on
01-049 (2/18/01). It terminates on 01-052 (2/21/01). The mm116 sequence,
successfully uplinked on 01-051 (2/20/01), begins executing on 01-053
(2/22/01).

Other – MGS performed flawlessly during the Roll Only Targeted Observation
demonstration executed on orbit #8690 of 01-047 (2/16/00). Post-test
analyses of the engineering data verified nominal performance by all
subsystems.

Spacecraft Health:

All subsystems report nominal health.

Uplinks:

There have been 6 uplinks to the spacecraft during the past week, including
instrument command loads and the background sequences cited above. There
have been 5,135 command files radiated to the spacecraft since launch.

Upcoming Events:

The mm117 background sequence will be uplinked on 01-054 (2/23/01). Because
the ROTO demonstration was successful, standard procedure will be to uplink
two ROTO mini-sequences each week. The ROTO mini-sequences for this next
week are mz073 and mz074.