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UARS WEEKLY STATUS REPORT - 17 Dec 2004
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SOLSTICE
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Nothing received.
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SUSIM
***********
Nothing received.
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PEM
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Nothing received.
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HALOE
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Nothing received.
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MLS
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Nothing received.
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HRDI
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Nothing received.
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MPG
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The MPG continues to serve as the point-of-contact for UARS
instrument operations in support of the Science Traceability
Mission of UARS.
Daily processing of instrument Daily Activity Plans continues
with no problems.
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CDHF
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Nothing received.
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FOT
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REPORTING PERIOD
This report covers 04 December 2004 (Orbit 72414, GMT Day 339) through
10 December 2004 (Orbit 72518, GMT Day 345).
SPACECRAFT OPERATION
The observatory is now in Reverse Flight (Northern Hemisphere viewing)
and is performing nominally under two-battery operations. The
instrument operational changes were:
INSTRUMENT OPERATIONAL CHANGES
Instrument Time Orbit Comment
SOLSTICE 340/1256 72436 DAY TO FULL TIME
SUSIM 340/1520 72438 POWER ON
PEM 341/1253 72451 POWER ON
HALOE 342/1250 72466 POWER ON
The beta angle ranged between the angles of 03.9 degrees to 30.4
degrees for this report period. The beta angle is now increasing
towards a maximum angle of 80 degrees on 23 December 2004 (DOY 358).
Spacecraft battery 1, 2, and 3 performance monitoring continues.
Battery 1 remains OFF the charge relay. Battery 2 and Battery 3 are
currently maintaining greater than 23.6 V end-of-night (EON) load bus
voltage. Battery temperatures are stable with a temperature delta
between Battery 2 and Battery 3 of 0.64 to 0.97 degrees C. Additional
battery performance data for each battery on 03 December and 10
December 2004 are provided in Appendix D.
The clock error ranged from 10.8 to -10.1 msec during this report
period. Clock rate adjustments are listed in Appendix C.
All instrument and subsystem engineers were advised on the initial
excursion of ALERTS or Out-Of-Limits conditions detected by the FOT
for this report. A summary is listed below and the details of ALERT
and Out-Of-Limits occurrences are listed in Appendix B.
OUT-OF-LIMITS = 00
ALERTS = 00
The following real-time command sheets were executed for the listed
operational element(s) during this report period (see Appendix A).
FOT = 02
SOLSTICE = 01
SUSIM = 01
PEM = 01
HALOE = 02
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 00
Zero (0) Anomaly Reports remained OPEN at the end of this report period
(see Appendix E).
GROUND SYSTEM OPERATION
Zero (0) operational support problems occurred this period. Anomaly
Reports are included in Appendix E.
The data loss calculations are no longer being supplied by Data
Capture Facility (DCF).
OTHER SIGNIFICANT EVENTS
UARS SATELLITE OPERATIONS
This week the file transfer issue between UPS and CMS was resolved.
After checking the FORMAT machine in TRMM and FDF it was found that no
USM products go through either machine. That lead the investigation
into the UPS software. UPS software developers were called in and
during their testing with the FOT found that the software required a
confirmed event in order for the USM to be transferred correctly to
the CMS. Therefore, all future testing will require confirmed events
for CMS to handle them properly. With this obstacle out of the way,
the FOT can now continue their CMS software acceptance testing.
MEETINGS
The FOT attended the UARS Monthly Status review on 07 December 2004 to
report the significant events from the month of November. The FOT was
given the action to write up a report describing the work done on
getting the SMA functionality implemented. That report was written
and sent out on 10 December 2004.
The FOT also attended the biweekly meeting with the HRDI PI team to
discuss the attitude error found in their data. This week the HRDI
team will continue to review the sample data given to them by FDF and
the simulations will continue on the UTTS.
FUTURE SIGNIFICANT EVENTS
The next UARS Yaw slew is scheduled for 12 January 2005 (DOY 012).
This maneuver will be a Reverse to Forward Flight maneuver (Southern
Hemisphere viewing).
Attachments: Appendix A, Real-time Command Sheets
Appendix B, Out-Of-Limits & ALERT Occurrences
Appendix C, Clock & Solar Array Rate Corrections
Appendix D, UARS Battery Performance Data
Appendix E, UARS Anomaly Reports
APPENDIX A
REAL-TIME COMMAND SHEETS
Week ending 10 December 2004
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
72436 340/1256 04-337 SOLSTICE DAY TO FULL TIME
72438 340/1520 04-338 SUSIM POWER ON-PT1
72451 341/1253 04-339 PEM POWER ON
72451 341/1253 04-338 SUSIM POWER ON-PT2
72464 342/0850 04-340 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
72466 342/1250 04-341 HALOE POWER ON PT 1
72469 342/1729 04-342 HALOE POWER ON PT 2
72482 343/1331 04-343 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 10 December 2004
The following Out-Of-Limits occurrences were detected:
MNEMONIC STATE DESCRIPTION ORBITS
-------- ----- ----------- ------
-None this report period.
The following ALERT occurrences were detected:
MNEMONIC DESCRIPTION ORBITS
-------- ----------- ------
-None this report period.
APPENDIX C
CLOCK & SOLAR ARRAY RATE CORRECTIONS
Week ending 10 December 2004
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
72464 342/0858 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
72482 343/1331 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 10 December 2004
03 December 2004 - GMT Day 338 Beta = 03.7 deg, SA Pos = 269 deg
DIFF V (mV) TEMP (C) CURR (amp) EON V AVE C/D AVE
BAT MAX/MIN MAX/MIN MAX/MIN MIN RATIO DOD(%)
--- ------- -------- ---------- ----- ------- ------
1 -700.0/-700.0 -3.05/-4.31 +00.0/+00.0 07.0 0.00 0.0
2 22.4/ -89.6 +5.46/+4.82 +27.2/-12.8 25.9 1.04 19.1
3 -11.2/-212.8 +4.50/+3.55 +26.8/-12.8 25.8 1.03 18.6
10 December 2004 - GMT Day 345 Beta = 30.4 deg, SA Pos = 269 deg
DIFF V (mV) TEMP (C) CURR (amp) EON V AVE C/D AVE
BAT MAX/MIN MAX/MIN MAX/MIN MIN RATIO DOD(%)
--- ------- -------- ---------- ----- ------- ------
1 -700.0/-700.0 -2.73/-3.68 +00.0/+00.0 07.0 0.00 0.0
2 44.8/ -05.6 +6.44/+5.47 +28.0/-13.6 25.9 1.03 20.7
3 -50.4/-190.4 +5.15/+4.51 +26.8/-13.2 25.8 1.02 20.2
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
-None this report period
APPENDIX E
UARS ANOMALY REPORTS
Week ending 10 December 2004
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
-None this report period.
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
04-086 FOT See List Nov 04 30832 Generic Late Acquisition
ANOMALY INVESTIGATION REPORTS GENERATED
AIR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
-None this report period.
OPEN ANOMALY REPORTS
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
-None this report period.