ACE Weekly 04/16/2008 - 04/22/2008

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude
	Date        04/16/2008
	DOY         107 2008
	Thrusters   2R 4R+ 4R-
	Duration    14:52 min
	Start       21:36:48z
	Stop        21:51:40z
	HGAStart    -6.52deg
	HGAStop     +7.62deg
	SunStart    11.88deg
	SunStop      6.80deg
	Nutation     0.12deg
	Firing      76 pulses
	FuelUsed      0.2430lbs
	FuelRemain  150.5808lbs
	FinalSCMass 1384.841lbs

The next attitude maneuver is scheduled for Monday 05/05/2008.

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OCRs:

None

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Activities:

None

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Anomalies:

DOY 109  04/18/2008  S-ACE-0302  G08-0042  Incorrect SOE
An update to the 34m/70m SOEs (G, H and I) at the end of March included
several pre-automation/legacy settings.  One of the issues caused DSS-34 to
be configured for the incorrect bit rate.  The FOT contacted DSS-34 and the
bit-rate was resolved.  The SOEs have been corrected.
DRs#C106341,C106342,C106343,C106344
IMPACT:  Activities delayed 20 minutes.

DOY 109  04/18/2008  S-ACE-0303  G08-0043  Data Dropout
DSS-34 had a brief 32 second telemetry dropout (110-00:32:43-00:33:15)
during SSR redumps.  Operations does not redump the redumps and 5 minutes
science data was lost.  The cause of the telemetry dropout is unknown.
DR#N104843,N104843
IMPACT:  5 minutes of science data lost (109-20:22:27 - 20:27:35)

DOY 112  04/21/2008  S-ACE-0304  G08-0044  Incorrect Network Configuration
Network changes were needed at DSN for a MMOC/SLE test on 04/18/2008.  These
network changes (SCAP table) were incorrectly entered into operations at
DSN.  No data reached the ACE MOC for the DSS-24 pass on 4/21/2008.  No
commanding was performed and the playback was not started.  Unfortunately,
DSN time is limited due to SOHO continuous and POLAR end of mission.  All
data should be captured if there are no further problems.
DR#G108532,G108539
IMPACT:  SSR failover 113 16:20:09-16:20:40z.  No clock calibration reports
will be generated for DOY 112 or DOY 113.  The weekly SWEPAM calibration was
performed on Tuesday 04/22/2008.