ACE Weekly 01/30/03 - 02/05/04
All ACE spacecraft subsystems are performing nominally. No attitude
maneuvers were executed this reporting period. The next attitude maneuver
is scheduled to occur on 02/06/04.
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Orbit Events:
Per Craig Roberts (FDF):
The next ACE transit begins February 22 and ends March 15 (a span of 22.49
days). This one will involve the closest angular approach to the Sun yet
seen, i.e., 0.63 degree (deg) from solar center. (By comparison, the solar
angular radius as seen from Earth at that epoch will be approx. 0.27 deg).
The updated details and epochs (UTC) follow:
22 Feb 05:22 4.75 deg inbound
28 Feb 15:51 2.0 deg inbound
1 Mar 17:19 1.19 deg inbound
3 Mar 21:57 0.63 deg closest approach
6 Mar 13:40 1.19 deg outbound
8 Mar 17:55 2.0 deg outbound
15 Mar 16:14 4.75 deg outbound
The 1.19 deg reference was included because that was the closest approach
during the December transit. ACE will spend 4.85 days within the 1.19 deg zone.
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OCRs Executed:
None.
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Ongoing Activities:
TAPS:
- Release 4.1.13 was delivered on 01/06/04 and is currently being tested by
the FOT. Open DRs have been prioritized by the FOT in preparation for
transition. The next two releases 4.2 and 4.2.1 are scheduled for 02/11/04
and 03/03/04 respectively. Upon delivery of Release 4.2, TAPS should
contain all functionality required to allow for TAPS transition.
- FOT currently reviewing TAPS System User's Guide.
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Automation (ROBOTT):
- Release 0.4 (HSM & OFFLINE) was installed on String 1 on 01/21/04. The
Command & Control component was not delivered because it is NOT ready for
operational use.
- Offline: 2 DRs have been fixed on String 3 and are ready for testing.
- HSM: 2 DRs have been fixed on String 3 and are ready for testing.
- Command & Control: All 6 DRs opened for C&C have been fixed on String 3
and are ready for testing.
- The RTMON subsystem is ready for testing on String 3.
- All FOT testing is slated to begin on 02/06/04.
=====================================================================
Anomalies:
DOY 04033 (02/02/04) ACE Anomaly G04-0009 - AC1WS3 Mouse Frozen
After the pass, AC1WS3 mouse stopped responding. Keyboard and workstation
working fine. IMPACT: None. TSM replaced the mouse.
DOY 04034 (02/03/04) ACE Anomaly G04-0010 - Timezone Problem Requiring
AC3FE1A Reboot
In Oct/Nov 2003, TSMs changed the timezone to GMT on all 3 strings. But
doing a remsh command generated output in EST (Eastern Standard
Time). Front Ends were rebooted by TSM. IMPACT: Automation developers
were not able to get real-time monitor (RTMON) working due to this
problem. CCSA TT #2003100008
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~