Mars Global Surveyor Status Report 27 Nov 2002

• Launch / Days since Launch = Nov. 7, 1996 / 2212 days
• Start of Mapping / Days since Start of Mapping = April 1, 1999 / 1337 days
• Total Mapping Orbits = 16,635
• Total Orbits = 18,318

Recent Events:

Background Sequences – The spacecraft is operating nominally in performing the beta-supplement daily recording and transmission of science data. The mm229 sequence executed successfully from 02-325 (11/21/02) through 02-327 (11/23/02). The mm230 sequence has performed well since it started on 02-328 (11/24/02). It terminates on 02-331 (11/27/02). The mm231 sequence, successfully uplinked on 02-330 (11/26/02), begins executing near the end of day on 02-331 (11/27/02).

Other – Fifteen Roll Only Targeted Observations (ROTOs) were performed successfully by the mz219, mz220, and mz221 mini-sequences. MGS has completed 418 ROTOs to date.

Spacecraft Health:

Spacecraft subsystems report good health and performance.

Uplinks:

There have been 18 uplinks to the spacecraft during the past week, including new star catalog and ephemeris files, instrument command loads, the mz221, & mz222 ROTO mini-sequences, and the mm230 & mm231 background sequences. 7,214 command files have been radiated to the spacecraft since launch.

Upcoming Events:

ROTOs are planned for next week in the mz221, mz222, & mz223 mini-sequences. A DDOR experiment will be conducted on 02-332 (11/28/02). A Nav acceptance test is scheduled for 02-333 (11/29/02). The next series of Radio Science Occultation Egress measurements will occur from 02-336 (12/02/02) to 02-337 (12/03/02) as part of mz223.