ACE Weekly 10/12/2010 - 10/18/2010 All ACE spacecraft subsystems are performing nominally. ======================================================================== Orbit/Attitude: Type Attitude Date 10/15/2010 DOY 288 2010 Thrusters 2R 4R+ 4R- Duration 14:32 min Start 12:45:12z Stop 12:59:44z HGAStart -7.12deg HGAStop +7.47deg SunStart 17.58deg SunStop 5.56deg SpinStart 5.0545rpm SpinStop 5.0576rpm Nutation 0.04deg Firing 74 pulses FuelUsed 0.2332lbs FuelRemain 133.4460lbs FinalSCMass 1367.706lbs The next attitude maneuver is scheduled for Thursday 10/28/2010. ======================================================================= OCRs: DOY 286 (10/13/2010) MMOC-191 UPS-14 Replacement The MMOC is powered by 2 Uninterruptible Power Supplies (UPS). UPS-14 was replaced on Wednesday 10/13/2010. Computers in the MMOC that use UPS-14 were switched to UPS-6 on Tuesday 07/12/2010. UPS-6 had been replaced on 07/20/2010. ======================================================================== Activities: Data Capture: 100% DOY 283-290 2010 There is a higher than normal risk of data loss from October 2010 through February 2011. If there are problems with the passes, it may not be possible to acquire additional DSN time. ======================================================================== Anomalies: DOY 288 10/15/2010 S-ACE-0547 G10-0063 ITOS tm_controller ITOS was unable to process telemetry due to a "timeout reading from tm_controller". ITOS was restarted before beginning of track. (DR CDSID#00027515) IMPACT: Manual intervention required. No delay in activities. DOY 291 10/18/2010 S-ACE-0548 G10-0064 DSS-27 stopped tracking DSS-27 stopped tracking unexpectedly. The maintenance team travelled to the antenna and performed several resets until a Cisco switch reset resolved the problem (DR#G110673) IMPACT: No data or commands for 125 minutes. No data to NOAA Space Weather Prediction Center (SWPC) for 125 minutes. 30 minutes of SSR playback gap redumped during this pass. 75 minutes of SSR playback (=12.5 hours) will be redumped on the following pass.