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UARS WEEKLY STATUS REPORT - 05 Jul 2002
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SOLSTICE
***********
Nothing received.
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SUSIM
***********
Nothing received.
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ACRIM
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Nothing received
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PEM
***********
Nothing received.
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HALOE
***********
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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WINDII
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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 to support re-engineering of the UARS
Mission Operations Concept to develop capabilities for the
Science Traceability Mission.
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 22 June 2002 (Orbit 58942, GMT Day 173) through
28 June 2002 (Orbit 59046, GMT Day 179).
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
SOLSTICE 176/1320 58994 POWER ON
SUSIM 176/1647 58996 POWER ON
HALOE 178/1316 59024 POWER ON
PEM 179/1357 59040 POWER ON
PEM 179/1648 59042 DAY ONLY MODE
The beta angle ranged between the angles of 0.0 degrees to 22.7
degrees for this report period. The beta angle is now increasing
towards a maximum angle of 79 degrees on 13 July 2002 (DOY 194).
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 23.8 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 0.96 degrees C. Additional
battery performance data for each battery on 21 June and 28 June 2002
are provided in Appendix D.
The clock error ranged from - 6.3 to 11.2 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
HALOE = 02
SUSIM = 01
SOLSTICE = 01
PEM = 02
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 01
Three (3) 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 new software release of the Eclipse software was moved to
operations on 24 June 2002. Only minor workstation configuration
issues were found, otherwise no problems were reported.
The FOT still awaits a decision regarding opening firewall rules for
the new TAC systems on the new UARS subnet. This is necessary to move
the TAC replacement systems out of building 14 and into the control
center.
MEETINGS
-None this report period
FUTURE SIGNIFICANT EVENTS
The next UARS Yaw slew is scheduled for 02 August 2002 (DOY 214).
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 28 June 2002
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
58943 173/0348 02-218 MPS VT-6 TO VT-5
58948 173/1045 02-219 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
58994 176/1320 02-220 SOLSTICE POWER ON
58996 176/1647 02-221 SUSIM POWER ON (START)
58997 176/1724 02-221 SUSIM POWER ON (CONTINUE)
59017 178/0117 02-221 SUSIM POWER ON (COMPLETE)
59024 178/1316 02-222 HALOE POWER ON (START)
59030 178/2157 02-223 HALOE POWER ON (COMPLETE)
59031 179/0019 02-224 SUSIM SUSIM CMDS
59040 179/1357 02-225 PEM POWER ON
59042 179/1648 02-226 PEM CHANGED TO DAY-ONLY MODE
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 28 June 2002
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 28 June 2002
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
58948 173/1048 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 28 June 2002
21 June 2002 - GMT Day 172 Beta = 3.7 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 +728.0/+728.0 -3.68/-4.62 +00.0/+00.0 9.4 0.000 0.0
2 +11.2/-089.6 +5.15/+4.19 +27.2/-14.4 24.5 1.010 20.5
3 +22.4/-044.8 +4.19/+2.92 +26.4/-14.0 24.5 1.010 20.3
28 June 2002 - GMT Day 179 Beta = 22.7 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 +728.0/+728.0 -3.68/-4.31 +00.0/+00.0 9.4 0.000 0.0
2 +05.6/-078.4 +5.15/+4.51 +27.2/-14.4 25.1 1.030 20.2
3 +16.8/-022.4 +4.19/+3.23 +26.8/-14.4 25.1 1.020 20.0
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
58943 173/0348 L6 -> L5
APPENDIX E
UARS ANOMALY REPORTS
Week ending 28 June 2002
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
02-036 FOT 58959 174/0526 N/A LATE ACQ DUE TO EQUIPMENT
PROB AT WHITE SANDS.
CDS# 31025
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
02-036 FOT See List June 01 N/A Generic Late Acquisition
ANOMALY INVESTIGATION REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
-None this report period.
OPEN ANOMALY REPORTS
AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
02-033 FOT 58553 147/0359 N/A SSPP IN WAIT
MODE/PLANNING ERR
02-035 FOT 58719 158/0606 44490 WSGT EQUIP PROBLEMS
02-035 FOT 58720 158/0746 44490 WSGT EQUIP PROBLEMS
02-037 FOT 58927 172/0223 N/A Data Dropout CDS#30824