********************************************************************
UARS WEEKLY STATUS REPORT - 28 Nov 2003
********************************************************************
***********
SOLSTICE
***********
Nothing received.
***********
SUSIM
***********
SUSIM successfully gathered all of its daily mid (1.1 nm) resolution
scans during periods of UARS telemetry or periods of onboard tape
recording.
***********
ACRIM
***********
Nothing received.
***********
PEM
***********
Nothing received.
***********
HALOE
***********
Nothing received.
***********
MLS
***********
Nothing received.
***********
HRDI
***********
Nothing received.
***********
WINDII
***********
Nothing received.
***********
MPG
***********
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.
***********
CDHF
***********
Nothing received.
***********
FOT
***********
REPORTING PERIOD
This report covers 15 November 2003 (Orbit 66623, GMT Day 319) through
21 November 2003 (Orbit 66742, GMT Day 325).
SPACECRAFT OPERATION
The observatory is now in Forward Flight (Southern Hemisphere viewing)
and is performing nominally under two-battery operations. The
instrument operational changes were:
INSTRUMENT OPERATIONAL CHANGES
Instrument Time Orbit Comment
HALOE 320/1250 66646 POWER ON (WARMUP)
The beta angle ranged between the angles of 28.8 degrees to 31.5
degrees for this report period. The beta angle is now increasing
towards a maximum angle of 36 degrees on 27 November 2003 (DOY 331).
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 1.27 to 1.29 degrees C. Additional
battery performance data for each battery on 14 November and 21
November 2003 are provided in Appendix D.
The clock error ranged from -05.5 to 07.3 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 = 00
SUSIM = 00
SOLSTICE = 00
PEM = 00
HALOE = 02
HRDI = 00
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 01
Two (2) Anomaly Reports remained OPEN at the end of this report period
(see Appendix E).
GROUND SYSTEM OPERATION
One (1) operational support problem 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
The problem found with the CMS-B pollers we believe has now been
resolved. Error messages in the processing lead to an investigation
of the file protection settings. Once these were adjusted the
processes preformed as expected. A few more tests will be performed
to verify that the solution has been found, but initial testing has
gone well. This will allow the FOT to continue with the rest of the
acceptance testing.
In parallel, the FOT is also working with the FSW group to review and
test the new flight software uplink and remove procedures. Testing
has gone well so far and should be completed by next week, so that the
end-to-end testing can begin. A new scenario has been built on the
simulator to more accurately represent the current status onboard.
This will be used during the end to end and final FSW testing.
MEETINGS
The FOT attended the bi-weekly 3 TDRS meeting to discuss current
status of all remaining activities and discuss a new target date for
uplink. The target date was not set and will depend on the progress
of the remaining tasks to be completed.
FUTURE SIGNIFICANT EVENTS
The next UARS Yaw slew is scheduled for 11 December 2003 (DOY 345).
This maneuver will be a Forward to Reverse Flight maneuver (Northern
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 21 November 2003
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
66646 320/1250 03-303 HALOE POWER ON (WARMUP)
66649 320/1727 03-304 HALOE POWER ON (COMPLETE)
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 21 November 2003
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 21 November 2003
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
None this report period.
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 21 November 2003
14 November 2003 - GMT Day 318 Beta = 12.1 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 -3.68/-4.94 +00.0/+00.0 07.2 0.000 0.0
2 +11.2/-28.0 +4.50/+3.55 +28.8/-12.8 26.1 1.010 19.6
3 +22.4/-22.4 +3.23/+2.28 +27.6/-12.8 25.9 1.020 19.1
21 November 2003 - GMT Day 325 Beta = 31.5 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 07.2 0.000 0.0
2 +05.6/-156.8 +5.79/+4.50 +28.4/-14.4 25.1 1.040 20.9
3 +16.8/-72.8 +5.14/+3.87 +27.6/-15.2 25.0 1.030 20.7
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
-None this report period.
APPENDIX E
UARS ANOMALY REPORTS
Week ending 21 November 2003
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
03-054 ECLIPSE 66625 319/0421 N/A Configs Crashed
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
03-053 FOT 66582 316/0720 N/A Eclipse Configuration Problem
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
------ ------ ----- ---- --- -----------------
03-052 FOT See List Nov 03 30832 Generic Late Acquisition
03-054 ECLIPSE 66625 319/0421 N/A Configs Crashed