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.

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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

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OCRs Executed:

NONE

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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.

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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.

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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
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