ACE Weekly 09/17/04 - 09/23/04

All ACE spacecraft subsystems are performing nominally.  A "Dog-Leg" 
attitude maneuver was successfully executed on 09/17/04.  The next attitude 
maneuver is scheduled for 09/27/04.

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Orbit Events:

The next SEZ crossing will occur in the Nov-Dec time frame.

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OCRs Executed:

None

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Ongoing Activities:

TAPS:
- Installation of TAPS release 4.3 occurred on 07/20/04.  FOT testing of 
this release is ongoing.
   -- Of the 6 DRs fixed in release 4.3, all have been verified.
   -- Two (2) new DRs have been opened to date and additional DRs may 
follow based on recent findings.

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Automation (ROBOTT):

- ROBOTT v0.8.1 performing operations in "Auto" mode on String 1.
   --  FOT is closely monitoring its performance and noting any discrepancies.
   --  ROBOTT is NOT being used for maneuvers.

- ROBOTT v0.9 was delivered to Strings 2 & 3 on 09/22/04.
   -- 13 DR fixes in this release.
   -- 2 DRs verified by FOT to date.

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Extra Spacecraft Activities:

The procedure S_TLM_SECTIONS was executed on 09/22/04 and SBE_CT_B had 
increased to 608.  The Scrub Error Count (SCRUB_ERR_CT_B) remains at 0.

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Anomalies:

DOY 04262 (09/18/2004) ACE Anomaly G04-0108 - GDS 26m (DSS-16) MFR Switch
DSS-16 switched from MFR1 to MFR3 at the beginning of the pass.  The FOT 
noticed slightly degraded data before the switch.  IMPACT:  None.  DR# G104817

DOY 04263 (09/19/2004) ACE Anomaly G04-0109 - GDS 26m (DSS-16) Antenna Problems
DSS-16 reported an elevation limit problem with the antenna while 
attempting to go to point (BOT 15:05).  DSS-27 was available and supported 
the FOT for the pass.  DSS-16 corrected the antenna problem however the FOT 
chose to remain with DSS-27 for the duration of the 
pass.  IMPACT:  None.  All activities were completed without extending the 
pass.  DR# G104823.

DOY 04264 (09/20/2004) ACE Anomaly G04-0110 - MOC Console - Keyboard problem
AC1XT3 keyboard did not respond to operator input.  TSMs notified and a new 
keyboard was installed.  IMPACT:  None.

DOY 04266 (09/22/2004) ACE Anomaly S04-0011 - Increase in SSR B SBE Count
While scrolling through SSR B's 30 telemetry sections, the FOT noticed that 
the SBE_CT_B had increased to 608.  It had previously been 286.  The Scrub 
Error Count (SCRUB_ERR_CT_B) remains at 0.  IMPACT:  None.  FOT will 
continue to run procedure periodically to monitor SBE activity.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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
gamiller@pop500.gsfc.nasa.gov
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~