ACE Weekly 02/22/2011 - 02/28/2011

All ACE spacecraft subsystems are performing nominally.

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

	Type         Attitude        SK-57
	Date        02/25/2011     02/25/2011
	DOY         056 2011       056 2011
	Thrusters   2R 4R+ 4R-     3A 4A
	Duration    15:27 min      75.004 sec
	Start       16:50:10z      18:35:01z
	Stop        17:05:37z      18:36:16z
	HGAStart    -6.57deg       +7.54deg
	HGAStop     +7.54deg       +7.42deg
	SunStart     9.32deg        7.04deg
	SunStop      7.04deg        7.08deg
	SpinStart   5.0808rpm      5.0847rpm
	SpinStop    5.0847rpm      5.0676rpm
	Nutation     0.25deg        0.29deg 
	Firing      79 pulses      Continuous
	FuelUsed      0.2464lbs      0.2617lbs
	FuelRemain  130.5824lbs    130.3208lbs
	FinalSCMass 1364.842lbs    1364.581lbs

The next attitude maneuver is scheduled for Thursday 03/17/2011.

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

None


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

Data Capture:  100%  DOY 051-058 2011


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

DOY 053  02/22/2011  S-ACE-0586  G11-0014  DSS-65 Antenna Brake
The ground antenna brake was engaged 11 minutes after Beginning Of Track
(BOT).  The brakes were released within 3 minutes and tracking resumed.
The Antenna Logic Controller module was replaced after the ACE pass.
DR#M106172
IMPACT:  Minimal.  Receiver B lost lock on the uplink, but C&DH B
commanding had already completed.

DOY 055  02/24/2011  S-ACE-0587  G11-0015  No Telemetry from MUS
For unknown reasons, the MMOC SLE software (Multi-User SLE, MUS) was not
sending any telemetry to ITOS or ace_data_fwd.  This problem last
occurred on 1/24/2011 AR#G11-0010.  ITOS and MUS were restarted.
IMPACT:  Activities delayed 15 minutes.  Manual intervention required.

DOY 055  02/24/2011  S-ACE-0588  G11-0016  DSN IDR Delivery Failed
DSN's IDR file delivery has not been successful since 2/23/2011.  DSN is
investigating.  Only the MMOC seems to be affected, ASC has not reported
any problems.
IMPACT:  The MMOC archives the DSN IDR files with the additional data in
the 0161 header.  Data archiving on hold while the problem is
investigated.

DOY 058  02/27/2011  S-ACE-0589  G11-0017  DSN DCD Failure
DSN's Data Capture and Delivery system (DCD) had a Store1 failure and
then a Store2 failure.  DR#N107172
IMPACT:  3 minute outage at 15:35z and a 20 minute outage at 15:59z.
The missing data was backfilled when the DCD system returned to service.
However, NOAA Space Weather Prediction Center was not able to process
the backfilled data and showed a 20 minute gap in dynamic plots.

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