ACE Weekly 10/31/03 - 11/06/03

All ACE spacecraft subsystems are performing nominally. An attitude 
maneuver was successfully executed on 11/06/03. The next attitude maneuver 
is scheduled for 11/21/03.

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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:

DOY 03308 - OCR EPAM-005
17:08:43 - Sent the first of two commands, EPAM_OP1_SET SELECT_STROBE = 32, 
to set the F-STROBE to the HIGH threshold.
18:13:06 - Sent the second of two commands, EPAM_OP1_SET SELECT_STROBE = 
28, to set the M-STROBE to the HIGH threshold.

DOY 03310 - OCR CRIS-011
17:04:27 Sent the first command, CRIS_PONII.
17:05:30 Sent the second command, CRIS_IIGAIN PARM=219
Both of these commands are used to turn the CRIS Image Intensifier back ON.

OCR SWPX-036 was scheduled for execution on DOY 03301 (10/28/03) but was 
delayed by Jim Griffee because of the solar activity. It is now scheduled 
for execution the week of 11/10/03.


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Ongoing Activities:

TAPS:
Release 4.1.9 was delivered on 11/04/03 and was found to have a problem 
generating Long Term Trending (LTT) products.  Release 4.1.10 was delivered 
on 11/06/03 and is currently being tested by the FOT.

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Automation (ROBOTT):

- ROBOTT version 0.2 (Offline) is operational on String 1.

- ROBOTT Version 0.3 was installed on String 2 (11/05/03) following the FOT 
verification of fixed Offline and HSM DRs on String 3.  The FOT is 
currently testing the release on String 2.

- Command & Control is still being tested by the Automation team and the FOT.

- The first draft of the SUG is expected soon.

=====================================================================
Anomalies:

DOY 03304 (10/31/2003) ACE Anomaly S03-0024 - SSCPAP5V Limit Violation.
The FOT performed a replay of the VC4 data from Day 301-302 to see if there 
were any limit violations due to the X17 class solar flare and CME.  The 
mnemonic SSCPAP5V violated the yellow low limit of 4.25V 2 times on day 
302.  For the first violation, the value dropped to 4.112 from 06:50:30 to 
06:51:18.  The second time, the value dropped to 4.064 from 07:02:51 to 
07:03:39.  Jim Raines notified.  IMPACT:  Unknown.  FOT will continue to 
monitor.

DOY 03304 (10/31/2003) ACE Anomaly S03-0025 - SWPE_OVRCNTALRM Limit Violation.
The FOT performed a replay of the VC4 data from Day 301-302 to see if there 
were any limit violations due to the X17 class solar flare and CME.  The 
mnemonic  SWPE_OVRCNTALRM violated the yellow high limit 5 times from Days 
301-302.  The first violation was on day 301 from 20:08:06 to 
20:29:26.  The second violation was on day 301 from 21:05:42 to 
21:18:30.  The third violation was on day 301 from 21:29:50 to 
21:44:06.  The fourth violation was on day 301 from 22:01:10 to 
22:26:46.  The fifth violation was from day 301 at 22:31:02 to day 302 at 
10:29:58. Jim Griffee notified.  IMPACT:  Unknown.  FOT will continue to 
monitor.

DOY 03306 (11/02/2003) ACE Anomaly G03-0109 -  GDS 34m (DSS-27) Antenna Red
DSS-27 informed the FOT that the antenna was red during the pre-pass 
briefing at 15:25. At 18:40, DSS-27 reported the antenna was working and 
telemetry was online at 18:49:09. The pass was extended until 22:15 in 
order to complete the SSR playback. IMPACT:  Delayed pass activities.  All 
telemetry was recovered.  DR#G103611

DOY 03308 (11/04/2003) ACE Anomaly G03-0110 -  GDS 26m (DSS-16) Command 
Problems
At 16:06:20 the FOT was unable to send commands to the spacecraft. After 
several attempts the FOT requested DSS-16 manually reset the command 
modulation index to 0.86, but there was no success in commanding.  ACE FOT 
requested DSS-16 re-sweep but still no success.
FOT requested that DSS-16 reapply the command modulation (flip ON the 
command subcarrier).  DSS-16 configured the command subcarrier from "only 
ON when sending a command" to "always ON".  FOT was able to command 
successfully.  The FOT requested that DSS-16 reset the command modulation 
to "only ON when sending a command".  FOT then sent a /NO_OP command to 
verify status of command modulation; success with command modulation back 
to a nominal state.  IMPACT: Unable to command to the spacecraft for ~17 
minutes.  Delay of pass activities for ~17 minutes. DR# G103617

DOY 03308 (11/04/2003) ACE Anomaly S03-0026 - S3DPU_CONV_SEC_I Limit Violation
The mnemonic S3DPU_CONV_SEC_I violated its red high limit once at 15:58:28. 
The mnemonic came back within limits at 15:58:29. Mark Popecki 
notified.  IMPACT: Unknown.  FOT will continue to monitor.

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