ACE Weekly 07/11/03 - 07/17/03

All ACE spacecraft subsystems are performing nominally. An attitude 
maneuver was successfully executed on 07/11/03. The next attitude maneuver 
is scheduled for 07/25/03.

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Orbit Events:

The next SEV transit will occur during the 09/01/03 - 09/23/03 time 
frame.  Expected minimum SEV angle will be 1.77 degrees.

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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 the current release. 
Testing is progressing on both TAPS#1 and TAPS#2.

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Automation (ROBOTT):
FOT testing of ROBOTT Release 0.1 is ongoing.  Testing of CRON began this 
week and it is running well to date.
The Automation Team is performing testing on the Command & Control system. 
The first release to the FOT is still TBD.

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Anomalies:

DOY 03192 (7/11/2003) - ACE Anomaly G03-0059 - GDS 26m (DSS-16)   Loss of 
Telemetry / TCP Halt
At 14:34:33, during the attitude maneuver, telemetry dropped out.  At the 
time of the drop out, the FOT was at pulse 40 of a 58 pulse maneuver.  The 
FOT informed DSS-16 of the data loss but the operator stated everything was 
nominal at the station.  The FOT contacted JPL Comm concerning the data 
loss and then DSS-16 called back, after checking their equipment, to 
confirm the problem was at the station (TCP Halt).  The operator said it 
would be 2 minutes until data resumed.  At 14:40:12, telemetry resumed and 
the FOT verified the completion of the maneuver.  FDF checked and confirmed 
the maneuver was successful.  IMPACT: Unable to monitor attitude 
maneuver.    DR# G103022

DOY 03192 (7/11/2003) - ACE Anomaly G03-0060 - GDS 26m (DSS-16)  Gap In 
Ground Receiver AGC
The ground receiver AGC values from DSS-16 have a gap between -119.83009 
and -124.56311.  All of the values we receive are outside of this 
range.  Checking past values has shown that this has been happening since 
DOY 03083 when 26m Upgrade equipment was installed (but only with 
DSS-16).  IMPACT:  Causes problems for RF trending.     DR# G102948



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