ACE Weekly 05/06/05 - 05/12/05 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude Date 05/09/05 DOY 129 2005 Thrusters 2R 4R+ 4R- Duration 11:10 min Start Time 16:08:03z Stop Time 16:19:13z Firing 57 pulses The next attitude maneuver and station keeping #36 are scheduled for Wednesday 05/25/05. ============================================================================ OCRs: None ============================================================================ Ongoing Activities: Space Link Extension (SLE) - The design review was completed on Tuesday 05/10/05. ============================================================================ Extra Activities: DOY 131 (05/11/05) - ROBOTT's Data Distribution Server (ACEDDS) was transitioned to the NASCOM network. ============================================================================ Anomalies: DOY 128 (05/08/05) ACE Anomaly S05-0015 SWICS Yellow Limit Violations SWICS had 6 brief (<36 seconds) yellow low limit violations (SSCGR20V < 17V and SSCPAP5V < 4.25V) during the increased solar activity on DOY 128 between 15:20:16 and 18:45:01. All violations were within 0.1Volts of the currently defined limit. Jim Raines notified. IMPACT: Awaiting instructions from Jim Raines if necessary. DOY 131 (05/11/05) ACE Anomaly G05-0074 26m GDS DSS-16 CMD Mod Index CMDs were not being received by the spacecraft. FOT notified station. Station re-entered CMD Mod Index and CMDs were accepted by the spacecraft. DSN has opened a work order for SBE1 not maintaining the MOD level. DR#G105638 IMPACT: Activities delayed 6 minutes. DOY 131 (05/11/05) ACE Anomaly G05-0075 Network data loss From 14:18z to End-Of-Track (17:20z), network drops resulted in ~1% data loss. JPL Comm was unable to determine the cause. All data was available on CDR. DR#N102846 IMPACT: Minimal. CDR file was ingested for TAPS.