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UARS WEEKLY STATUS REPORT - 17 Oct 2003
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SOLSTICE
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SOLSTICE continues to perform nominally, taking solar data on all
available orbital tracking periods. This week we received about 58% of
each day's data amounting to about 520 minutes of solar observing time
per day.
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SUSIM
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SUSIM successfully gathered all of its daily mid (1.1 nm)
resolution, weekly offset, and O2 occultation scans during periods
of UARS telemetry or periods of onboard tape recording.
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ACRIM
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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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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 in support of the Science Traceability
Mission of UARS.
Daily processing of instrument Daily Activity Plans continues
with no problems.
The MPG participated in the 3-TDRSS status meeting held
on 16 October.
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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 October 2003 (Orbit 65992, GMT Day 277) through
10 October 2003 (Orbit 66096, GMT Day 283).
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
SUSIM 278/1404 66015 POWER ON
SOLSTICE 278/2246 66020 DAY ONLY TO FULLTIME OPS
PEM 279/1306 66029 ZEPS & NEPS TO DAY ONLY
HALOE 280/1303 66044 POWER ON
HRDI 283/0158 66083 DAY ONLY TO FULLTIME
HRDI 283/1909 66093 PROCESSOR REBOOT
The beta angle ranged between the angles of 03.1 degrees to 29.3
degrees for this report period. The beta angle is now increasing
towards a maximum angle of 68 degrees on 22 October 2003 (DOY 295).
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 1.59 to 1.60 degrees C. Additional
battery performance data for each battery on 03 October and 10 October
2003 are provided in Appendix D.
The clock error ranged from -09.6 to 10.0 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 = 03
SUSIM = 01
SOLSTICE = 01
PEM = 02
HALOE = 02
HRDI = 02
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 02
Two (2) Anomaly Reports remained OPEN at the end of this report period
(see Appendix E).
GROUND SYSTEM OPERATION
Two (2) 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
The FOT continues to move forward with the 3 TDRS implementation. The
new database has been recompiled and moved onto the UARS Command
Management System. The FOT has also received the official release of
the new CMS software and has commenced testing. In parallel, the FOT
has also initiated working with the FSW group to review and test the
new flight software uplink procedure.
MEETINGS
The FOT attended the UARS Monthly Status review on 07 October 2003.
FUTURE SIGNIFICANT EVENTS
The next UARS Yaw slew is scheduled for 11 November 2003 (DOY 315).
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 October 2003
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
65999 277/1228 03-264 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
66015 278/1404 03-265 SUSIM POWER ON
66016 278/1548 03-262 PSU FROM VT6 TO VT5
66017 278/1737 03-266 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
66018 278/1814 03-262 MPS BATSOC
66020 278/2246 03-267 SOLSTICE DAY-ONLY TO FULLTIME OPS
66029 279/1221 03-265 SUSIM POWER ON COMPLETED
66029 279/1306 03-268 PEM ZEPS & NEPS TO DAY ONLY
66044 280/1303 03-269 HALOE POWER ON; PART 1
66048 280/1918 03-270 HALOE POWER ON; PART 2
66059 281/1301 03-271 PEM AXIS 1 TURN ON (7 WATTS)
66083 283/0158 03-272 HRDI DAY ONLY TO FULLTIME
66093 283/1909 03-273 HRDI PROCESSOR REBOOT
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 10 October 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 10 October 2003
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
65999 277/1228 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
66017 278/1740 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 10 October 2003
03 October 2003 - GMT Day 276 Beta = 03.4 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 -3.05/-4.62 +00.0/+00.0 07.2 0.000 0.0
2 +11.2/-33.6 +5.47/+4.51 +28.0/-13.6 26.2 1.020 20.0
3 +16.8/-33.6 +4.51/+2.92 +26.8/-13.6 26.2 1.020 19.5
10 October 2003 - GMT Day 283 Beta = 29.3 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/-4.62 +00.0/-50.0 07.2 0.000 0.0
2 +16.8/-67.2 +6.11/+4.51 +28.4/-50.0 25.4 1.030 20.5
3 +22.4/-50.4 +4.83/+3.23 +27.2/-50.0 25.3 1.030 20.0
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
66016 278/1548 LV6 -> LV5
APPENDIX E
UARS ANOMALY REPORTS
Week ending 10 October 2003
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
03-050 FOT 66086 283/0749 30832 Generic Late Acquisition
03-051 HRDI 66083 283/0158 NA HRDI Not Accepting Microloads
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
-None this report period.
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
------ ------ ----- ---- --- -----------------
03-050 FOT See List Oct 03 30832 Generic Late Acquisition
03-051 HRDI 66083 283/0158 NA HRDI Not Accepting Microloads