ACE Weekly 05/22/2012 - 05/28/2012 All ACE spacecraft subsystems are performing as expected. ======================================================================== Orbit/Attitude: Type Attitude SK-61 Date 05/25/2012 05/25/2012 DOY 146 2012 146 2012 Thrusters 2R 4R+ 4R- 1A 2A Duration 16:18 min 54.715 sec Start 15:24:54z 16:49:37z Stop 15:41:12z 16:50:32z HGAStart -7.83deg +7.81deg HGAStop +7.81deg +7.71deg SunStart 4.87deg 15.20deg SunStop 15.20deg 14.96deg SpinStart 5.0632rpm 5.0680rpm SpinStop 5.0680rpm 5.0503rpm Nutation 0.08deg 0.29deg Firing 83 pulses Continuous FuelUsed 0.2515lbs 0.1907lbs FuelRemain 121.5952lbs 121.4044lbs FinalSCMass 1355.855lbs 1355.665lbs The next attitude maneuver is scheduled for Thursday 06/07/2012. ======================================================================= OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 141-148 2012 WS1, the 18-meter antenna in White Sands, NM, has fixed the command issue with changes to their PTPs (Programmable Telemetry Processors, which are also used for the command connection). Previously, the MMOC needed to disconnect & reconnect in-between sending commands. There were no problems with commanding during the WS1 test on Thursday 5/24/2012. The MMOC is currently updating procedures and tools for use with WS1. A review will be given to SSMO management after the procedures and tools have been updated. ======================================================================== Anomalies: Update on AR#S12-0001 S-ACE-0639 SWEPAM-E Overcount Alarm The SWEPAM-Electron Overcount Alarm flagged continuously from DOY 135 to 144 and intermittently (sometimes continuously) from DOY 144 to 148. It stopped flagging on DOY 148. The instrument team is working the next course of action, but their time is limited. IMPACT: The instrument automatically reduces voltages when the overcount alarm occurs.