ACE Weekly 11/26/2014 - 12/02/2014

ACE spacecraft subsystems are performing as expected.

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Orbit/Attitude:

	Type          Attitude                SK-72
	Date         12/02/2014            12/02/2014
	DOY           336 2014              336 2014
	Thrusters     2R 4R+ 4R-             3A 4A
	Duration       6:21 min             1:00 min
	Start         16:42:03z            17:52:18z
	Stop          16:48:24z            17:53:18z
	ra,decStart  254.42,-9.49          260.38,-9.27
	ra,decStop   260.38,-9.27          260.36,-9.26
	ra,decExpect 260.59,-9.36
	Deviation      0.20 deg (-3% short)
	HGAStart      -8.77 deg             +9.03 deg
	HGAStop       +9.03 deg             +9.01 deg 
	SunStart      13.77 deg             17.11 deg
	SunStop       17.11 deg             17.08 deg
	SpinStart    5.0040 rpm            5.0051 rpm
	SpinStop     5.0051 rpm            4.9913 rpm
	Nutation       0.19 deg              0.27 deg
	Firing        32 pulses            continuous
	FuelUsed       0.1042 lbm            0.2042 lbm
	FuelRemain   102.3802 lbm          102.1760 lbm
	FinalSCMass  1336.640 lbm          1336.436 lbm

The next attitude maneuver is scheduled for Tuesday 12/09/2014.

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OCRs:

None

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Activities:

Data Capture:  99.995%  DOY 327-341 2014
DOY 333 11:29:45-11:30:16  32 second gap during SSR failover

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Anomalies:

DOY 332  11/28/2014  S-ACE-0691  DSS-24 transmitter red
DSS-24 unable to provide an uplink to the spacecraft due to a failed
high voltage power supply.
IMPACT:  No SSR playback performed.  SSR B filled at 333-11:29:45 (~43
hour capacity).  There was a 32 second gap during the switch to SSR A
recording.  An additional pass was acquired on Sunday 11/30/2014 after
the Hayabusa-2 launch slip to catch up on the SSR playback

DOY 335 12/01/2012  S-ACE-0523  S10-0007  Increase in SBE_CT_B
SSR B Single Bit Error Count (SBE_CT_B) increased from 13302 to 14066
sometime between 11/19/2014 and 12/01/2014.  SBE_CT is tracked as a
measure of SSR health.  No single bit errors had occurred since May
2012.
IMPACT:  Minimal.  Single Bit Errors are automatically corrected by the
SSR.  No non-correctable errors (Hard Single Bit Errors & Double Bit
Errors) have occurred throughout the mission.

	       SBE_CT_A  SBE_CT_B
	1999   15
	2000
	2001
	2002
	2003   270       286
	2004             858
	2005
	2006             2118
	2007   510       3238
	2008             4533
	2009   525       6839
	2010   780       7339
	2011             10995
	2012             13302
	2013
	2014             14066