ACE Weekly 01/28/2009 - 02/03/2009

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude
	Date        02/02/2009
	DOY         033 2009
	Thrusters   2R 4R+ 4R-
	Duration    13:32 min
	Start       16:40:16z
	Stop        16:53:48z
	HGAStart    -7.35deg
	HGAStop      7.67deg
	SunStart     6.93deg
	SunStop     17.87deg
	SpinStart   5.0044rpm
	SpinStop    5.0078rpm
	Nutation     0.06deg
	Firing      68 pulses
	FuelUsed      0.2222lbs
	FuelRemain  144.8256lbs
	FinalSCMass 1379.085lbs

The next attitude maneuver is scheduled for Monday 02/16/2009.

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OCRs:

DOY 030 (01/30/2009)  2308-2313z  SIS-043
M1B HV strip #15 has excess leakage current that causes noise in SIS RTSW
data.  This strip will be disabled and its threshold raised.  In the present
version of SIS firmware the maximum number of strips with raised thresholds
is 20, and that maximum was reached with SIS OCR-42.  M1B GND strip #26 is
quiet enough so its threshold will be lowered to make room for raising the
threshold on M1B HV strip #15.


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Activities:

Data Capture:  100%  DOY 025-032 2009

The ACE/DSS-27 and WIND/DSS-24 Multi-Mission test on Thursday 01/29/2009
(1545-1745z) was successful.  The MMOC ITOS/SLE simultaneously received ACE
and WIND telemetry.  Four commands were sent to ACE (2xno_op and
2xdownlink_format) and four to WIND (tick, tock, gnip and gnop).

The DSN CDR file created from the MMOC test was an aggregate data file
(VC1+VC2+unsynchronized data).  The ACE Science Center has requested to JPL
that DSN provide separate VC1 (realtime) and VC2 (playback) files.  Current
DSN CDR files with the legacy equipment are separated; this request is for
data files that will be generated after the transition to TLM SLE.


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Anomalies:

None