ACE Weekly 10/03/03 - 10/09/03

All ACE spacecraft subsystems are performing nominally. An attitude 
maneuver was successfully executed on 10/03/03.  The next attitude maneuver 
is scheduled for 10/13/03.

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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) was installed September 18th on String 1. 
The FOT initial checkout has been completed and operational activities have 
been transitioned back to String 1.
- Automation Team testing of HSM and Command & Control on String 3 
continues. C&C is currently shadowing passes and an expected delivery date 
to the FOT is mid-to-late October.
- The first draft of the SUG is expected soon.

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Anomalies:

DOY 03276 (10/03/2003) ACE Anomaly G03-0090 - GDS 26m (DSS-16) Hydraulic 
Failure on the Y-Axis
Telemetry was offine from DSS-16 for 3 min. & 23 secs. IMPACT:  Delayed 
pass activities.  All data subsequently recovered.  DR# N103425.

DOY 03276 (10/03/2003) ACE Anomaly G03-0091 - GDS 26m (DSS-16) TCP Halt at 
DSS-16
DSS-16 moved to the backup TCP.  IMPACT:  Telemetry was offline for 1 min. 
& 39 secs.  All data subsequently recovered.  DR# G103426.

DOY 03277 (10/04/2003) ACE Anomaly G03-0092 - GDS 26m (DSS-16) Y-Axis 
Stopped Tracking - IMPACT:  Telemetry was offline from DSS-16 for 2min 
3sec.  All data subsequently recovered.  DR# G103435.

DOY 03277 (10/04/2003) ACE Anomaly G03-0093  - GDS 26m (DSS-16) DPS Session 
Problem on String 1 (R/T string)
Data was captured on string 2 DPS for the entire pass with DSS-16. The 
session problem with DPS (string 1) was corrected during the pass. 
IMPACT:  NONE

DOY 03279 (10/06/2003) ACE Anomaly G03-0094 - GDS 34m (DSS-27) - APC Problems
DSS-27 informed ACE FOT that the antenna went to brake with no known cause. 
DSS-27 recycled the antenna equipment.   IMPACT:  No telemetry for ~19 
minutes.  Delayed pass activities.  All data subsequently recovered.   DR# 
G103451

DOY 03279 (10/06/2003) ACE Anomaly G03-0095 - GDS 34m (DSS-27) - CTX Problems
Degraded data throughout the pass with DSS-27. Impacts: Loss 2% of VC2 
data.  2% of VC2 data loss = 4% of VC4 data loss. DR# N101470

DOY 03280 (10/07/2003) ACE Anomaly G03-0096 - IPNOCC - TLAN Problems
Network problems on String 1. The CCSA informed ACE FOT that the TLAN-1 
AARP had a glitch as per IPNOC. Impacts: None.  ACE FOT failed-over to 
String 2 before the pass began. Trouble Ticket# 2003100006

DOY 03281 (10/08/2003) ACE Anomaly G03-0097 - GDS 26m (DSS-16) - Power Outage
At 16:00:00 OPS Chief notified ACE FOT that there was a power outage at 
Goldstone Complex.
Power was subsequently restored and the station contacted the 
spacecraft.  IMPACT:  Late acquisition. Delayed pass activities for 1hr 
7min.  DR# G103465

DOY 03282 (10/09/2003) ACE Anomaly G03-0098 - GDS 26m (DSS-16) - Hydraulic 
Problems
DSS-16 notified FOT that they were having problems with their hydraulic 
system.  Telemetry was lost for a short time.   IMPACT:  Loss of telemetry 
for 1min 57sec. Delayed pass activities.  All data subsequently 
recovered.    DR# G103473

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