ACE Weekly 10/12/2010 - 10/18/2010

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude
	Date        10/15/2010
	DOY         288 2010
	Thrusters   2R 4R+ 4R-
	Duration    14:32 min
	Start       12:45:12z
	Stop        12:59:44z
	HGAStart    -7.12deg
	HGAStop     +7.47deg
	SunStart    17.58deg
	SunStop      5.56deg
	SpinStart   5.0545rpm
	SpinStop    5.0576rpm
	Nutation     0.04deg
	Firing      74 pulses
	FuelUsed      0.2332lbs
	FuelRemain  133.4460lbs
	FinalSCMass 1367.706lbs

The next attitude maneuver is scheduled for Thursday 10/28/2010.

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OCRs:

DOY 286 (10/13/2010)  MMOC-191  UPS-14 Replacement
The MMOC is powered by 2 Uninterruptible Power Supplies (UPS).  UPS-14
was replaced on Wednesday 10/13/2010.  Computers in the MMOC that use
UPS-14 were switched to UPS-6 on Tuesday 07/12/2010.  UPS-6 had been
replaced on 07/20/2010.


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Activities:

Data Capture:  100%  DOY 283-290 2010

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:

DOY 288  10/15/2010  S-ACE-0547  G10-0063  ITOS tm_controller
ITOS was unable to process telemetry due to a "timeout reading from
tm_controller".  ITOS was restarted before beginning of track.  (DR
CDSID#00027515)
IMPACT:  Manual intervention required.  No delay in activities.


DOY 291  10/18/2010  S-ACE-0548  G10-0064  DSS-27 stopped tracking
DSS-27 stopped tracking unexpectedly.  The maintenance team travelled to
the antenna and performed several resets until a Cisco switch reset
resolved the problem (DR#G110673)
IMPACT:  No data or commands for 125 minutes.  No data to NOAA Space
Weather Prediction Center (SWPC) for 125 minutes.  30 minutes of SSR
playback gap redumped during this pass.  75 minutes of SSR playback
(=12.5 hours) will be redumped on the following pass.