ACE Weekly 12/05/03 - 12/11/03 All ACE spacecraft subsystems are performing nominally. No maneuvers were executed this reporting period. The next attitude maneuver will occur on 12/18/03. The NOAA FTP server was down from DOY 03343 (Tuesday) - through DOY 03346 (Friday). The FOT discovered the problem and notified NOAA on Tuesday. All products remained in the FORMATS queue during that time and was successfully delivered when NOAA brought up their server. ============================================================================ Orbit Events: The SEZ transit has begun. Its particulars remain basically the same as previously given. Closest angular approach to the Sun will be approximately 0.58 degree closer than the September transit, which was 1.76 deg. To summarize the 24-day transit by epoch and SEV angle: 26 Nov 20:56Z 4.75 deg (inbound) 5 Dec 01:22Z 2.0 deg 8 Dec 18:17Z 1.19 deg (minimum) 12 Dec 19:27Z 2.0 deg 20 Dec 22:00Z 4.75 deg (outbound) To date there has been no SEZ related problems encountered. ===================================================================== OCRs Executed: None. ===================================================================== Ongoing Activities: TAPS: Release 4.1.11 was delivered on 11/19/03 and is currently being tested by the FOT. The next release (4.1.12) will be delivered on 12/16/03. The SUG is currently being reviewed by the FOT and SGT. ---------------------------------------------------------------------------- Automation (ROBOTT): - ROBOTT version 0.2 (Offline) is operational on String 1. Version 0.3 is to be delivered on 12/15/03. - ROBOTT Version 0.4 is to be installed on String 2 on 12/18/03. This release will include HSM, Offline, and Command & Control. - The first draft of the SUG is expected soon. ===================================================================== Anomalies: DOYs 03342-03343 (12/08-09/2003) ACE Anomaly S03-0027 - SEPICA SSD 2 Temp Yellow High Violation Mnemonic SSSSSD2T violated its Yellow High limit 11 times. Mark Popecki notified. IMPACT: None. FOT received direction from Mark Popecki to make a limit change for this mnemonic and that has been completed. See MOCR 03-0981. DOY 03340 (12/06/2003) ACE Anomaly G03-0122 - GDS 26m (DSS-16) Exciter Problem At 17:21, DSS-16 gave 'Go for Command', however the telemetry showed that both spacecraft receivers were 'Out-of-Lock'. Contacted DSS-16 of the problem and gave the station permission to perform a resweep of the spacecraft. At 17:24, DSS-16 gave 'Go for Command' a second time, however both the spacecraft receivers were still 'Out-of-Lock'. Gave DSS-16 permission to perform another resweep of the spacecraft. At 17:27, DSS-16 notified FOT of exciter problems and stated that the exciter would need to be rebooted. At 17:29, FOT gave permission to resweep the spacecraft again. At 17:31, DSS-16 gave successful 'Go for Command' with both spacecraft receivers 'In-Lock'. IMPACT: Delayed pass activities. DR# G103801 DOY 03343 (12/09/2003) ACE Anomaly G03-0123 - GDS 34m (DSS-24) DSS-24 RED DSS-24 was declared RED due to exciter problems. DSS-27 provided coverage for the support. There were no problems during the D27 support. IMPACT: None. DR#G103817. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Glen A. Miller ACE Flight Operations Observatory Engineer Honeywell Technology Solutions Inc. Goddard Space Flight Center Building 14, Room W10A Mail Stop 428.2 Greenbelt, MD 20771 Office: 301-286-7071 Pager: 800-425-3174 Fax: 301-286-1729 Email: gamiller@pop500.gsfc.nasa.gov ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~