ACE Weekly 06/10/05 - 06/16/05 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude Date 06/15/05 DOY 166 2005 Thrusters 2R 4R+ 4R- Duration 10:24 min Start Time 16:08:08z Stop Time 16:18:32z Firing 53 pulses The next attitude maneuver is scheduled for Wednesday 06/29/05. ============================================================================ OCRs: None ============================================================================ Ongoing Activities: Space Link Extension (SLE) - The requirements document has been baselined. The test plan is near completion with a target completion date of 06/30/05. Next ACE JPL telecon scheduled for 07/21/05. ============================================================================ Extra Activities: DOY 167 (06/16/05) SSR B 30 Telemetry Sections downlinked. No new Single Bit errors (correctable) found. ============================================================================ Anomalies: DOY 161 (06/10/05) ACE Anomaly G05-0081 GSFC Bldg 14 Chilled Water/Power The GSFC Bldg 14 chilled water pipe burst and power outages resulted in loss of network and telemetry from 17:31:42z to End-Of-Track (18:00:00z). Strings 2 and 3 were shutdown properly in case of UPS failure. No UPS failure occurred and String 1 was able to support all passes for the weekend. Strings 2 and 3 were restored on Monday. IMPACT: 28 minute loss of telemetry at end of pass. End of pass spacecraft checkout not completed. ROBOTT notifications were delayed until network was restored. DOY 163 (06/12/05) ACE Anomaly G05-0082 MDS (DSS-66) Transmitter Problems Station was able to correct problems with S-Band Exciter (SBE2) at BOT by manually reloading presets and recalibrating. IMPACT: Activities delayed 12 minutes.