ACE Weekly 07/26/2011 - 08/01/2011

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 Wednesday 08/03/2011.

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OCRs:

None


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Activities:

Data Capture:  100%  DOY 205-212 2011

The GRAIL mission is expected to launch 09/08/2011.  ACE has reduced DSN
antenna time during September.  The current schedule has ACE losing ~15%
data over 3 weeks in September.  The data loss will be greater if there
are problems with any of the passes.

NOAA Space Weather Prediction Center (SWPC) server was unable to process
the high-rate real-time data (1 frame per second) from the MMOC on
Tuesday 07/26/2011 and Wednesday 07/27/2011.  NOAA SWPC rebooted their
server on Wednesday and was able to process MMOC real-time data.

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Anomalies:

DOY 212  07/31/2011  S-ACE-0622  G11-0049  Empty Clock Calibration
The MMOC tool ace_clock_report did not complete on DOY 206, 207 and 212.
ITOS was restarted on DOY 208 and ace_clock_report worked successfully
from DOY 208 through DOY 211.  ITOS was restarted again on DOY 212.
This is the same problem that occurred from 01/13/2011 through
01/15/2011 (SOAR S-ACE-0578 G11-0006).  ace_clock_report worked
successfully when started from a terminal window, but did not work when
started from ITOS.  It is unknown what is happening to ITOS that causes
ace_clock_report to not complete, but an ITOS restart solves the
problem.
IMPACT:  Clock reports for DOY 206, 207 and 212 manually regenerated.