Mars Global Surveyor Status Report 7 June 2000

Wednesday, June 07, 2000 (DOY 145/19:00:00 to DOY 159/19:00:00 UTC)

Launch / Days since Launch = Nov 7, 1996 / 1309 days

Start of Mapping / Days since Start of Mapping = April 1, 1999 / 433 days

Total Mapping Orbits = 5589

Total Orbits = 7192

Recent Events:

Background Sequences — The spacecraft continues to operate nominally in performing the beta-supplement daily recording and transmission of science data. The following
background sequences executed successfully: mm042 from 00-146 (5/25/00) through 00-149 (5/28/00); mm043 from 00-150 (5/29/00) through 00-152 (5/31/00); mm044
from 00-153 (6/01/00) through 00-156 (6/04/00); and mm045 from 00-157 (6/05/00) through 00-159 (6/07/00). The mm046 sequence was successfully uplinked on 00-158
(6/06/00) and will begin executing on 00-160 (6/08/00).

Spacecraft Health:

All subsystems report nominal health.

Uplinks:

There have been 19 uplinks to the spacecraft during the last two weeks, including new star catalogs and ephemeris files, instrument command loads, and the background
sequences cited above. Total command files radiated to the spacecraft since launch is 4685.

Upcoming Events:

Normal beta-supplement sequences are planned between now and Solar Conjunction. We are in the initial stages of Solar Conjunction command sequence generation and
testing. The mm050, and mm051 sequences will contain the lion’s share of spacecraft commands for the Solar Conjunction period, 6/21/00 through 7/12/00. There will be
some spacecraft configuration commands related to Solar Conjunction contained in the mm049 and mm052 sequences.