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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.

Uplinks:

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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