Mars Global Surveyor Status Report 5 Mar 2003

Status Report From: Jet Propulsion Laboratory
Posted: Monday, March 10, 2003

  • March 05, 2003 (DOY 057/19:00:00 to DOY 064/19:00:00 UTC)
  • Launch / Days since Launch = Nov. 7, 1996 / 2310 days
  • Start of Mapping / Days since Start of Mapping = April 1, 1999 / 1435 days
  • Total Mapping Orbits = 17,834
  • Total Orbits = 19,517

Recent Events:

Background Sequences - The spacecraft is operating nominally in performing the beta-supplement daily recording and transmission of science data. The mm257 sequence executed successfully from 03-058 (2/27/03) through 03-060 (3/01/03). The mm258 sequence has performed well since it started on 03-061 (3/02/03). It terminates on 03-064 (3/05/03). The mm259 sequence, successfully uplinked on 03-063 (3/04/03), begins executing near the end of day on 03-064 (3/05/03).

Other - Ten Roll Only Targeted Observations (ROTOs) were performed successfully by the mz249 and mz250 mini-sequences. MGS has completed 581 ROTOs to date.

Spacecraft Health:

Spacecraft subsystems report good health and performance. Electrical power margin is being managed by utilizing on-board solar array pointing scripts instead of auto-tracking. On 03-064 (3/05/03), the "three-part motion 25-degree offpoint" scripts replaced the "three-part motion 0-degree offpoint" scripts. This decreases the excess energy being produced by the solar panels thereby preserving life in the Partial Shunt Assemblies.


There were 19 uplinks to the spacecraft during the past week. They included new star catalog and ephemeris files, nominal instrument command loads, three 25-degree offpoint solar array motion scripts, the mz250 & mz251 ROTO mini-sequences, and the mm258 & mm259 background sequences. 7,456 command files have been radiated to the spacecraft since launch.

Upcoming Events:

ROTOs are planned for the mz251 & mz252 mini-sequences. A Delta-DOR experiment is scheduled for 03-074 (3/15/03). Another Solar Array and HGA Flex Modes Test is scheduled for 03-076 (3/17/03).

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