ACE Weekly 05/09/03 - 05/16/03

All ACE spacecraft subsystems are performing nominally. No attitude 
maneuver was performed this week. The next attitude maneuver is scheduled 
for 05/22/03.

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Orbit Events:

The next expected SEV transit is to occur:

Entry: 06/01/03 at 1442Z
Minimum angle: 2.18 degrees on 06/13/03 at 1618Z
Exit: 06/25/03 at 1652Z

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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):
Testing of the Offline and HSM systems is progressing. Testing by the 
Automation team for Command and Control is still paused due to testing at 
WIND. The first release of Command and Control to the FOT is still TBD.

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Anomalies:

Day 03133 (5/13/2003) - ACE Anomaly Report #G03-0039 - GDS 34m (DSS-27) 
RCVR A&B VCO YH Limit Violations
Received VCO limit violations at carrier up on both receivers. FOT queried 
the station as to what their sweep range was set to.  DSS-27 stated their 
sweep range was 120 kHz for 12 seconds (10 kHz per second). The FOT has 
data showing the actual sweep range used was 240 kHz for 12 seconds (20 kHz 
per second).  This is incorrect as stated in the recent OPD-ACE-008. This 
data was passed onto the Scott Riley (DSN) for further 
investigation.  IMPACT:  None.  VCO values returned to within nominal limits.

Day 03134 (5/14/2003) - ACE Anomaly Report #G03-0040 - GDS 26m (DSS-66) 
Invalid Bandwidths Set
Telemetry was offline from DSS-66 (12:21:06 - 12:37:34). DSS-66 stated they 
were configured for the wrong bit rate.  IMPACT:  Delayed pass 
activities.  All data was recovered.  DR# M101608


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