ACE Weekly 12/28/2010 - 01/03/2011

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:


No maneuvers were completed this week.  The next attitude maneuver is
scheduled for Wednesday 01/05/2011.

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 360-002 2011

There is a higher than normal risk of data loss from October 2010
through February 2011.  If there are problems with the passes, it may
not be possible to acquire additional DSN time.

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Anomalies:

Last week anomaly numbering:  There was an additional unreported ITOS
tm_controller anomaly on 12/23/2010.  The following is the updated
numbering for last week's anomalies.

12/21/2010  DSS-65 Brief Telemetry Delay  G10-0083 -> G10-0083
12/23/2010  ITOS tm_controller                     -> G10-0084
12/24/2010  Goldstone Power Glitch        G10-0084 -> G10-0085
12/26/2010  ITOS tm_controller            G10-0085 -> G10-0086


DOY 364  12/30/2010  S-ACE-0572  G10-0087  DSS-27 CMD problems
DSS-27 was receiving commands from the MMOC, but was not sending them to
the spacecraft.  The station switched from CMG1 to CMG2 (Command
Modulator Generator) and the commands were successfully sent to the
spacecraft. DR#G110919
IMPACT:  Activities delayed 25 minutes.  No NOAA impact (spacecraft in
RTSW format).


WIND anomalies reported when they would affect ACE.

DOY 002  01/02/2011  S-WIND-0413          ITOS tm_controller
Before Beginning Of Track, ITOS had problems connecting telemetry,
"timeout reading from tm_controller".  ITOS was stopped and restarted
and the WIND pass was taken successfully.
IMPACT:  Manual intervention required.


DOY 002  01/02/2011  S-ACE-0573  G10-0088  DSS-27 Precal Delayed
The station's precal activities were not started at the scheduled time.
DR#G110930
IMPACT:  Activities delayed 33 minutes.  No NOAA impact (spacecraft in
RTSW format).


DOY 002  01/02/2010  S-ACE-0574  G10-0089  DSN Data Capture and Delivery
DSN's DCD (Data Capture and Delivery) had an automatic failover causing
a link connection to be lost (1655z).  DSN performed a manual DCD
failover which resolved the problem.  DR#G110936
IMPACT:  Telemetry paused for 12 minutes.  The telemetry was backfilled
when the connection was restored.