ACE Weekly 12/27/2011 - 1/02/2012

All ACE spacecraft subsystems are performing as expected.

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Orbit/Attitude:

	Type        Attitude
	Date        12/29/2011
	DOY         363 2011
	Thrusters   2R 4R+ 4R-
	Duration    15:49 min
	Start       16:15:42z
	Stop        16:31:31z
	HGAStart    -7.98deg
	HGAStop     +7.53deg
	SunStart     6.90deg
	SunStop     18.25deg
	SpinStart   5.0366rpm
	SpinStop    5.0410rpm
	Nutation     0.15deg
	Firing      80 pulses
	FuelUsed      0.2512lbs
	FuelRemain  124.4668lbs
	FinalSCMass 1358.727lbs

The next attitude maneuver is scheduled for Thursday 01/12/2012.

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OCRs:

None

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Activities:

Data Capture:  99.82%  DOY 359-001 2012
360 15:38:08-15:51:02  775 seconds  no data - insufficient antenna time
360 15:51:03-15:53:03  121 seconds  ADC only
362 10:50:11-10:50:41   31 seconds  no data - SSR failover
364 05:47:50-05:48:20   31 seconds  no data - SSR failover
365 13:26:39-13:28:29  111 seconds  no data - SSR procedures

The limited antenna time during GRAIL LOI and the MMOC SLE problems
resulted in ~18 minutes of data loss this week.  ~15 minutes of data
loss on DOY 360 was due to not enough time to dump the data before the
SSR failover on DOY 362.  There was enough time to capture all of the
data before the 2nd SSR failover on DOY 364.  There are some scenarios
where a slice of the SSR is partially dumped.  This problem started when
the SSR procedures were modified in September 2011 for the GRAIL launch.
This caused the ~2 minute gap on DOY 365.  A MOCR to update the SSR
procedures will be opened.

The new FDF product server started accepting automated logins from the
MMOC starting on Tuesday 1/3/2012.  It hadn't been working since
12/22/2011.

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Anomalies:

DOY 001  01/01/2012  S-ACE-0624  G11-0051  MUS CMD unable to BIND
The MMOC SLE (MUS) cmd process (ace-d27-cmd) generated the error "Cannot
send a BIND because of the following Anite error condition:
ace-d27-cmd's F-CLTU provider object could not thread off an Operations
server because".  MUS CMD was restarted and no further problems
occurred.  This problem previously occurred on 3/13/2011. (DR# 111882)
IMPACT:  Manual intervention required.  Activities delayed 90 minutes.