ACE Weekly 01/03/2012 - 1/09/2012 All ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: No maneuvers were completed this week. The next attitude maneuver is scheduled for Thursday 01/12/2012. ======================================================================= OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 001-008 2012 ======================================================================== Anomalies: The "Ground Antenna Stop" problem was not listed in last week's report. DOY 365 12/31/2012 S-ACE-0636 G11-0062 Ground Antenna Stop DSS-27 antenna emergency stop was activated about 1 hour before End Of Track. Cause is unknown. Tracking resumed within 10 minutes. IMPACT: Minimal. Data captured during redumps. DOY 003 01/03/2012 S-ACE-0523 S10-0007 Increase in SBE_CT_B SSR B Single Bit Error Count (SBE_CT_B) increased from 10995 to 11639 since last checked on DOY 355 (12/21/2011). 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 525 6839 2010 780 7339 2011 10995 2012 11639 DOY 008 01/08/2012 S-ACE-0635 G11-0061 No Telemetry from MUS The MMOC SLE software (Multi-User SLE, MUS) was not sending RT telemetry to ITOS or ace_data_fwd. This last occurred 12/25/2011. MOCR 381 had implemented a simple disconnect/connect for these situations, but that did not fix the problem on this day. MUS needed to be restarted. IMPACT: Manual intervention required. Activities delayed 25 minutes. A SLE/MUS problem occurs every few months. But there have been SLE/MUS problems for the past 3 weekends. This is likely just a random coincidence. The MMOC is using MUS 3.0. MUS 4.1 is undergoing testing and may solve some of these problems.