ACE Weekly 05/05/2010 - 05/11/2010 All ACE spacecraft subsystems are performing nominally. ======================================================================== Orbit/Attitude: No maneuvers were completed this week. The next attitude maneuver is scheduled for Wednesday 05/12/2010. ======================================================================= OCRs: None ======================================================================== Activities: Data Capture: 100% DOY 122-129 2010 ======================================================================== Anomalies: DOY 128 05/08/2010 S-ACE-0501 G10-0024 ITOS tm_controller Before Beginning Of Track, ITOS had problems connecting telemetry, "timeout reading from tm_controller". At 15 minutes after Beginning of Track, ITOS was stopped and restarted and the ACE pass was taken successfully. This problem occurs approximately once every 2 weeks. DR CDSID#00027515 has been submitted and the ITOS developers expect this to be fixed in ITOS 805. MOCR-156 has added "timeout reading from tm_controller" to the notification messages sent to the team. IMPACT: Manual intervention required. Activities delayed 20 minutes. DOY 131 05/11/2010 S-ACE-0502 G10-0025 MMOC SLE CMD Unable to Bind 1 hour and 25 minutes after Beginning of Track, the MMOC MUS aborted the SLE CMD connection to DSS-24, "Heartbeat receive timeout". MUS attempted to rebind but was unsuccessful. When this occurs, the problem is usually fixed by asking the station to switch the CLTU production state to "halt" and back to "operate" (e.g. 10/23/2008 AR#G08-0102 DR#C106578). This pass was unattended. IMPACT: Telemetry was not affected. No commanding for the remainder of the support. End of pass state-of-health checks not performed. SSR stuck in playback (see AR#S10-0002). Manual cleanup of pass performed on following day before the next pass started. DOY 131 05/11/2010 S-ACE-0503 S10-0002 SSR A Stuck in Playback When the SSR playback is longer than the pass, the SSR is commanded to idle before switching to the low-rate (RTSW) data format. Problems with the SLE CMD connection (AR#G10-0025) prevented SSR A from being commanded to Idle. When this occurs, the SSR is stuck in Playback. Impact: The ground procedures are designed to handle this contingency by idling the SSR at the beginning of the next support and redumping any missing data. This has occurred 4 other times in the past. 01/12/2005 AR#S05-0002 12/01/2005 AR#G05-0148 11/04/2008 AR#G08-0109 10/04/2009 AR#S09-0007