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Mars Global Surveyor Status Report

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. 

Uplinks: 

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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