ACE Weekly 03/16/2007 - 03/22/2007 All ACE spacecraft subsystems are performing nominally. ============================================================================ Orbit/Attitude: Type Attitude Attitude Date 03/16/2007 03/16/2007 DOY 075 2007 075 2007 Thrusters 2R 4R- 4R+ 2R 4R- 4R+ Duration 4:47 min 7:30 min Start 16:27:06z 17:45:28z Stop 16:31:53z 17:52:58z StartHGA -5.19 deg -0.53 deg StopHGA -0.53 deg +7.09 deg Firing 25 pulses 38 pulses FinalSCMass 1392.116lbs 1392.074lbs Station-keeping maneuver #43 has been re-scheduled for Monday, 04/02/2007. ============================================================================ OCRs: None ============================================================================ Activities: DOY 081 (03/22/2007) - The support was completed manually without automation for training. RIONET * An operational test of RIONet will be performed on April 4, 2007 (DOY 094). The RIONet will be used for the entire ACE support with DSS-66. The Closed IONet will serve as backup. * String 2 conversion is targeted for April 18, 2007. ROBOTT * Testing of the recent patch (v1.0.3) has been completed. This patch allows ROBOTT to work with the RIONet (CDSID#22954 and #23091). Space Link Extension (SLE) - ACE SLE version 2.1 was delivered to the Library on April 28, 2006. Installation in the ACE MOC will not occur until after the MOC is converted to the RIONET. ============================================================================ Anomalies: Update on Anomaly G07-0018 - DSS-66 Bad Ground Receipt Time The bad Ground Receipt Time problem from DOY 073-074 did not recur for the ACE pass on DOY 076. The ACE Science Center was able to successfully process the DOY 076 CDR files. Polar, Geotail and SOHO also had similar problems with their DSS-66 DOY 073-074 CDR files and the ACE team provided support for their data recovery. DOY 077 03/18/2007 S-ACE-0159 G07-0020 DSS-66 Late Acquisition Station had problems with both MFRs during the previous support with SOHO. The MFR problem was resolved after the SOHO pass and station was able to support the ACE pass. Activities were delayed 11 minutes while DSS-66 was configuring for the ACE support. IMPACT: Minimal. Activities delayed 11 minutes. DOY 079 03/20/2007 S-ACE-0160 G07-0021 ROBOTT/C&C 2 procedures started ROBOTT started 2 procedures at the same time; G_END_DAY/21:25:03 and S_OPS_PLBK_COMPLETE/21:25:07. TPOCC did not continue with S_OPS_PLBK_COMPLETE, but G_END_DAY completed successfully. The 2 procedure problem last occurred 02/04/2007 and is a recurring problem that the developers are aware of. CDSID#21085 & #21122 IMPACT: SSR redumps were performed on the following support.