Mars Global Surveyor Status Report 13 June 2001

Status Report From: Jet Propulsion Laboratory
Posted: Wednesday, June 13, 2001

Wednesday, June 13, 2001 (DOY 157/19:00:00 to DOY 164/19:00:00 UTC)

Launch / Days since Launch = Nov. 7, 1996 / 1680 days
Start of Mapping / Days since Start of Mapping = April 1, 1999 / 804 days
Total Mapping Orbits = 10,129
Total Orbits = 11,812

Recent Events:

Background Sequences - The spacecraft is operating nominally in performing the beta-supplement daily recording and transmission of science data. The mm146 sequence executed successfully from 01-158 (6/7/01) through 01-160 (6/09/01). The mm147 sequence has performed well since it started on 01-161 (6/10/01). It terminates on 01-164 (6/13/01). The mm148 sequence, successfully uplinked on 01-163 (6/12/01), begins executing on 01-165 (6/14/01).

Other - Nine more Roll Only Targeted Observations (ROTOs) were performed since the last report. MGS has completed 126 ROTOs to date.

Spacecraft Health:

All subsystems report good health and status.


There have been 18 uplinks to the spacecraft during the past week, including new star catalogs and ephemeris files, instrument command loads, the background sequences cited above, and ROTO mini-sequences mz107 & mz108. There have been 5,437 command files radiated to the spacecraft since launch. Upcoming Events:

DOY 01-172 (6/21/01) marks the end of the beta-supplement phase and the beginning of the nominal mapping phase of the mission. Planetary and orbital geometry will allow the HGA to auto-track the Earth without impacting the HGA boom. Nominal mapping sequences will not be as command intensive as the beta-supplement sequences. Therefore, 28-day background sequences will be the norm instead of the 3 and 4 day beta-supplement sequences.

Another MGS Mars Relay On-orbit UHF Test will be conducted with Stanford University between 01-177 (6/26/01) and 01-179 (6/28/01). MOLA Polar Scans are scheduled for 01-193 (7/12/01) and 01-194 (7/13/01).

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