ACE Weekly 06/09/2010 - 06/15/2010

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

	Type        Attitude
	Date        06/11/2010
	DOY         162 2010
	Thrusters   2R 4R+ 4R-
	Duration    15:08 min
	Start       14:05:05z
	Stop        14:20:13z
	HGAStart    -6.28deg
	HGAStop     +7.46deg
	SunStart     6.89deg
	SunStop     11.46deg
	SpinStart   5.0521rpm
	SpinStop    5.0560rpm
	Nutation     0.11deg
	Firing      77 pulses
	FuelUsed      0.2419lbs
	FuelRemain  135.6448lbs
	FinalSCMass 1369.905lbs

The next attitude maneuver is scheduled for Tuesday 06/22/2010.

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OCRs:

None

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Activities:

Data Capture:  100%  DOY 157-164 2010

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Anomalies:

DOY 162  06/11/2010  S-ACE-0512  G10-0031  ITOS tm_controller
ITOS was unable to process telemetry due to a "timeout reading from
tm_controller".  ITOS was restarted before beginning of track.  This
problem occurs approximately once every 2 weeks.  DR CDSID#00027515 has
been submitted and the ITOS developers expect this to be fixed in ITOS
805.
IMPACT:  Manual intervention required.  No delay in activities.

NOTE:  ITOS had provided beta version ITOS 804-7 for review.  Minimal
testing has been performed, but it has been found that ITOS 804-7 is not
populating telemetry parameters with multiple source fields (the
majority of parameters for ACE and WIND).  With the limited resources,
finding time to test a new version of ITOS will be difficult.


DOY 163  06/12/2010  S-ACE-0513  G10-0032  NOAA Unable To Process TLM
At 2032z, NOAA Space Weather Prediction Center (SWPC) called the FOT and
informed that they were unable to process ACE telemetry from either
antenna at DLR (Germany) and WCDA (Wallops Virginia) since 1905z.  The
FOT went to MMOC and found no problems with the previous pass.  The FOT
requested time with DSS-24 (available 2105-2140z) to verify that the
spacecraft was ok.  DSS-24 provided telemetry from 2114-2121z.  There
were no problems with the spacecraft.  At 2149z, NOAA was able to
process telemetry after discovering a full disk partition on their
system.
IMPACT:  Given the downlink format problem on 11/24/2009 (AR#S09-0009),
the FOT followed prudence and checked the spacecraft after receiving the
call from NOAA.  Note, the cause of the problems is different than the
previous instance of NOAA unable to process telemetry (04/18/2010,
AR#G10-0021).


DOY 166  06/12/2010  S-ACE-0514  G10-0033  DSN/Madrid Power Failure
DSN's Madrid Complex experienced a power failure.  DSS-65 stopped
tracking with 37 minutes left in the pass.  Telemetry was restored with
5 minutes left in the pass.  Uplink was not re-established
IMPACT:  No data forwarding to NOAA during the TLM outage.  NOAA was
able to track after the spacecraft automatically switched to the RTSW
format.  SSR playback had already completed.