ACE Weekly 08/12/2009 - 08/18/2009

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude
	Date        08/17/2009
	DOY         229 2009
	Thrusters   2R 4R+ 4R-
	Duration    12:16 min
	Start       15:42:36z
	Stop        15:54:52z
	HGAStart    -4.55deg
	HGAStop     +7.70deg
	SunStart     4.81deg
	SunStop     14.82deg
	SpinStart   5.0288rpm
	SpinStop    5.0320rpm
	Nutation     0.07deg
	Firing      62 pulses
	FuelUsed      0.2006lbs
	FuelRemain  141.2184lbs
	FinalSCMass 1375.479lbs

The next attitude maneuver is scheduled for Friday 09/04/2009.

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 221-228 2009

There is no pass on Friday 08/21/2009 (DOY 233) and 2 passes scheduled
for Saturday 08/22/2009 (DOY 234).  No data loss is expected.

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Anomalies:

DOY 224  08/12/2009  S-ACE-0456  G09-0049  Network Data Loss
The ACE MOC experienced 0.2% telemetry data loss.  JPL Comm and Goddard
Comm Control notified.  The problem was not resolved before the end of
the pass.
Impact:  Minimal.  All data was available from the DSN's CDR (Central
Data Recorder).  Note that a 0.2% random data loss corresponds to a ~25%
loss of complete major frames.

DOY 224  08/12/2009  S-ACE-0457  G09-0050  Hostname Error
After the transition from the ISIS network software (11/2002), the
network for the front-end processors was simplified and the "backplane"
IP addresses were removed.  During a network scan, it was discovered
that the backplane addresses were still defined in the hosts file and
were removed.  TPOCC, however, still looked for the backplane and
generated errors when the backplane address could not be resolved.  This
had no impact on operations other than to generate errors.  The
backplane was reinstated in the hosts file with the ACE MOC's current
addresses.
Impact:  Minimal.  No impact other than TPOCC error messages in the
event log.