ACE Weekly 12/02/2009 - 12/08/2009

All ACE spacecraft subsystems are performing nominally.

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Orbit/Attitude:

No maneuvers were completed this week.  The next attitude maneuver is
scheduled for Thursday 12/10/2009.

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OCRs:

None

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Activities:

Data Capture:  99.99%  DOY 333-340 2009
31 second gap (2009-336 10:27:57-10:28:27) due to DSS-24 transmitter
problems on DOY 335

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Anomalies:

DOY 340  12/06/2009  S-ACE-0473  S09-0010  Increase in SBE_CT_B
SSR B Single Bit Error Count (SBE_CT_B) increased from 6089 to 6839
since last checked on DOY 333 (11/29/2009).  SBE_CT is tracked as a
measure of SSR health.
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             6839