ACE Weekly 04/15/2009 - 04/21/2009

All ACE spacecraft subsystems are performing nominally.

========================================================================
Orbit/Attitude:

No maneuvers were completed this week.  The next attitude maneuver is
scheduled for Friday 05/01/2009.

=======================================================================
OCRs:

None

========================================================================
Activities:

Data Capture:  100%  DOY 102-109 2009

The ASC address for receiving real-time data changed on April 14.
Nascom is working to implement a ruleset change for the new ASC address.
ASC has not received real-time data since April 14.

========================================================================
Anomalies:

DOY 105  04/15/2009  S-ACE-0429  G09-0024  TPOCC/OS Bitbucket Error
The HPUX operating system occasionally returns a bitbucket error when
the TPOCC ground software executes a unix program.  The ROBOTT
automation software is designed to continue through the error.  Usually
this is not a problem, but on this occasion the procedure continued
before the SSR redumps had been calculated.  No redumps were necessary,
but if they were, they would have been completed on the following
support.
IMPACT:  Minimal.

DOY 110  04/20/2009  S-ACE-0430  G09-0025  AC1FE1A Failure
The AC1FE1A front-end computer in the MOC failed.  The SysAdmins and
Hardware Maintenance replaced the CPU A card and terminal before the
pass had started Monday evening
IMPACT:  If the front-end computer was not functioning by the time of
Monday's pass, the pass would have been taken with the String 2
computers.  Note, manual failover would have been necessary since
automatic string failover has not worked in the past.