ACE Weekly 08/27/2008 - 09/02/2008 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Spin Down Attitude Attitude Date 09/02/2008 09/02/2008 09/02/2008 DOY 246 2008 246 2008 246 2008 Thrusters 3R- 4R- 2R 4R+ 4R- 2R 4R+ 4R- Duration 8.016 sec 7:02 min 5:36 min Start 15:57:52z 16:37:01z 17:44:36z Stop 15:58:00z 16:44:03z 17:50:12z HGAStart -6.75deg -6.80deg +2.40deg HGAStop -6.80deg +2.40deg +7.18deg SunStart 7.00deg 6.98deg 10.18deg SunStop 6.98deg 10.18deg 15.49deg Nutation 0.02deg 0.36deg 0.51deg Firing Continuous 36 pulses 28 pulses FuelUsed 0.0288lbs 0.1243lbs 0.0989lbs FuelRemain 148.0464lbs 147.9220lbs 147.8232lbs FinalSCMass 1382.307lbs 1382.182lbs 1382.083lbs SpinStart 5.0951 rpm SpinStop 5.0023 rpm PeriodStart 11.7760 sec PeriodStop 11.9945 sec The next attitude maneuver and Station-Keeping #48 are scheduled for Monday 09/22/2008. =========================================================================== OCRs: None ============================================================================ Activities: Data Capture: 100% DOY 239-245 2008 DOY 242 08/29/2008 DSN SPS/TTC Project Interface Test (PIT) DSN requested a 1-hour ACE pass to test upgrades to their Service Preparation Subsystem (SPS) V1.2 and Tracking, Telemetry & Command (TTC) V8.1. The test was successful. However, the test was delayed 40 minutes while DSN reconfigured their equipment. ============================================================================ Anomalies: DOY 242 06/10/2008 S-ACE-0348 G08-0085 ROBOTT/C&C Terminated Procedure The MOC automation software, ROBOTT, prematurely terminated the SSR redump procedure (s_ops_plbk_complete.prc). ROBOTT did not see that the previous procedure had completed and terminated all procedures. This is a known issue (CDSID#21122) which last occurred on 06/10/2008 (AR#G08-0066). IMPACT: Minimal. No redumps were required.