ACE Weekly 01/16/2008 - 01/22/2008

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude       SK-46
	Date        01/17/2008     01/17/2008
	DOY         017 2008       017 2008
	Thrusters   2R 4R+ 4R-     3A 4A
	Duration    15:16 min      52.112 sec
	Start       17:11:50z      18:49:48z
	Stop        17:27:06z      18:50:40z
	HGAStart    -6.90deg        7.40deg
	HGAStop      7.40deg        7.45deg
	SunStart     6.96deg       11.88deg
	SunStop     11.88deg       11.83deg
	Nutation     0.27deg        0.15deg
	Firing      78 pulses      Continuous
	FuelUsed      0.2489lbs      0.1876lbs
	FuelRemain  152.2016lbs    152.0140lbs
	FinalSCMass 1386.461lbs    1386.273lbs

The next attitude maneuver is scheduled for Monday, 01/28/2008.

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OCRs:

None

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Activities:

The risk of data loss has increased for the December-January time frame.  If
there are problems with the passes, it may not be possible to
acquire additional DSN time.  Refer to 12/25/2007 weekly for further
information.

The lost pass on DOY 015 resulted in an SSR Failover (31 second data loss
2008-016-15:23:42 to 15:24:12).  4 days were needed to catch up on SSR
Playback.  Fortunately, there were no additional problems and no further
data loss.

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Anomalies:

DOY 017  01/17/2008  S-ACE-0267  G08-0007  ROBOTT/C&C Froze
The ACE MOC automation software (ROBOTT) froze during the procedure
S_OPS_PLBK_COMPLETE.  RTMON restart not performed since less than 15 minutes
before End of Track. CDSID#00021192
IMPACT:  This is a recurring issue that the ROBOTT developers are aware of.
Procedure G_ACEDOWN not performed.  This last occurred 3 months ago on
10/11/2007.

DOY 018  01/18/2008  S-ACE-0268  G08-0008  ACEDDS & AC2XT2 Display Failures
Two monitors failed.  Hardware maintenance was notified and replaced the
monitor.
IMPACT:  Minimal.  The ACE MOC has 21 HP Monitors (most from 1997) and
currently averages 2 failures per year.