ACE Weekly 10/17/03 - 10/23/03

All ACE spacecraft subsystems are performing nominally.  No maneuvers were 
executed this reporting period.  The next attitude maneuver is scheduled 
for 10/24/03.

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Orbit Events:

The next SEV transit will occur November 26th through December 20th. The 
minimum SEV angle expected will be approximately 1.19 degrees.

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OCRs Executed:

NONE

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Ongoing Activities:

TAPS:
Release 4.1.8 was delivered on 10/07/03. The FOT is currently testing this 
final release to ensure all DRs flagged as "essential to transition" have 
been fixed.

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Automation (ROBOTT):
- ROBOTT version 0.2 (OFFLINE) is operational on String 1.
- Automation Team testing of HSM on String 3 continues.
- C&C is currently in-test by the FOT on String 3 with expected delivery to 
String 2 sometime in December.
- New releases of OFFLINE & HSM to String 2 are expected the week of 3 
November.
- The first draft of the SUG is expected soon.

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Anomalies:

DOY 03290 (10/17/2003) ACE Anomaly G03-0101 - DPS Unable to Process Session
DPS software reported errors in the preprocessing of the pass data.  All 
attempts to restart processes but they failed.  Performed block replay to 
recapture the data into a new session.  The new session was processed 
nominally.  IMPACT:  Additional post processing required.  All data was 
captured by DPS in the block replay.

DOY 03292 (10/19/2003) ACE Anomaly G03-0102 - GDS 26m (DSS-16) TCP 1 Halt
TCP 1 halted requiring DSS-16 to reboot.  Telemetry resumed after 
~4min.   IMPACT: None.  All telemetry was subsequently acquired. DR# G103532.

DOY 03293 (10/20/2003) ACE Anomaly G03-0103 - DPS Unable to Process Session
Same problem occurred on DOY 03290.  DPS software reported errors in the 
preprocessing of the pass data.  All attempts to restart processes but they 
failed.  Performed block replay to recapture the data into a new 
session.  However the new session data was not processed as another attempt 
to process the original session was successful.  IMPACT:  Additional post 
processing required.

DOY 03294 (10/21/2003) ACE Anomaly G03-0104 - GDS 26m (DSS-16) Y-Axis 
Hydraulics Problem
Telemetry halted and DSS-16 reported Y-Axis hydraulics problem.  Telemetry 
resumed after ~5min.   IMPACT:  Delayed pass activities.  All telemetry was 
subsequently acquired. DR# G103537.

DOY 03295 (10/22/2003) ACE Anomaly G03-0105 - GDS 26m (DSS-16) TCP 1 Halt
TCP 1 halted requiring DSS-16 to reboot.  Telemetry resumed after 
~3min.   IMPACT: None.  All telemetry was subsequently acquired. DR# G103543.

DOY 03296 (10/23/2003) ACE Anomaly G03-0106 - GDS 26m (DSS-16) RNS Problem
Telemetry went offline and ACE FOT contacted DSS-16; DSS-16 reported that 
there were problems with the RNS. 17:24:29 Telemetry back online after 
~23min, but noticed frequent dropped frames in telemetry.  Informed DSS-16 
of dropped frames in telemetry; DSS-16 requested a resweep to reacquire the 
satellite.  Once the resweep completed telemetry was nominal.  Telemetry 
went offline again and ACE FOT contacted DSS-16.  Telemetry back online 
after ~1min and again FOT noticed dropped frames in telemetry. Started 
receiving complete frames after ~1min.   IMPACT:  Delayed pass 
activities.  All telemetry was subsequently acquired. DR# G103550, G103551.


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~