ACE Weekly 09/24/2008 - 09/30/2008

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

No maneuvers were performed this week.  The next attitude maneuver is
scheduled for Monday 10/13/2008.

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OCRs:

None

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Activities:

Data Capture:  99.84%  DOY 265-272 2008
A 16min 25sec gap (267 20:37:03-20:53:27z) due to missed redumps.  See
AR#G08-0090.


DOY 268 09/24/2008 - DSS-34 Return To Service Demo with SPS/TTC
DSS-34 is returning to service after "Ka-Band Phase 2"
(06/16/2008-10/27/2008).  Also tested were the upgrades to the Service
Provider Subsystem (SPS v1.2.0.1) and Tracking, Telemetry, and Command (TTC
v8.1.4).  No problems were uncovered during the 1-hour demo.

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Anomalies:

DOY 268  09/24/2008  S-ACE-0355  G08-0090  Redump Calculation Incorrect
A problem with the FOT tool that calculates SSR redumps caused a data loss
of 16min 25sec (DOY 267 20:37:03-20:53:27z).  The current assessment is that
a unix process died halfway through and the SSR write_point variable was set
to zero.  MOCR 1374 has been opened to handle this situation.  ADC data is
available starting at 20:51:12 but that only provides another 2min 15sec of
data.
IMPACT:  Data capture for the week is 99.84%.

DOY 264  09/20/2008  S-ACE-0356  G08-0091  Ephemeris For NOAA Incorrect
The FDF ephemeris delivered to NOAA on 09/11/2008 did not extend 28 days as
expected.  A new ephemeris was generated on 09/22/2008 but started in 2009.
A new ephemeris was generated on 09/24/2008 which covered the correct time
range.
IMPACT:  Minimal.  NOAA stations were still able to track ACE.