ACE Weekly 08/29/03 - 09/04/03 All ACE spacecraft subsystems are performing nominally. An attitude maneuver was successfully executed on 09/02/03. The next attitude maneuver is scheduled for 09/08/03. ============================================================================ Orbit Events: ACE is currently in SEV transit through 09/23/03. Expected minimum SEV angle will be 1.76 degrees. The essential timeline based on a 30-min step scan for this 22 day, 8.5 hour event is: - SEZ entry (4.75 deg inbound) on Sept. 1 at 0100Z - Minimum Sun-Earth-ACE angle = 1.760 deg on Sept. 12 at 0800Z - SEZ exit (4.75 deg outbound) on Sept. 23 at 0930Z ===================================================================== OCRs Executed: NONE ===================================================================== Ongoing Activities: TAPS: Trending, Analysis and Plotting System (TAPS) development continues with emphasis being placed on fixing the DRs attributed to prior releases. Release 4.1.7 is scheduled for installation on 09/09/03. ---------------------------------------------------------------------------- Automation (ROBOTT): - Offline testing is progressing well on String 2. There are a few minor issues, but nothing that is keeping the system from running nominally. We expect to be finished testing this new release on String 2 by the end of September. - FOT currently training on the Automation system. - Automation Team testing of HSM and Command & Control on String 3 has resumed. C&C is shadowing passes and an expected delivery date to the FOT is 09/15/03. - The first draft of the SUG is expected to completed 10/01/03. ===================================================================== Anomalies: DOY 03241 (08/29/2003) ACE Anomaly G03-0081 - TPOCC - Time Adjusted messages TPOCC is continually making time adjustments to match the GMT time. This reoccurrence happens about every 5 minutes. It is known that software was previously installed to automatically update the system time, however it is unknown if this is related to the problem. Submitted a trouble ticket via the CCSA website. Ref: TT# 2003080004. IMPACT: Unknown at this time. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~