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UARS WEEKLY STATUS REPORT - 14 JAN 2005
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SOLSTICE
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SOLSTICE began day only operations on January 11 in support of the yaw
maneuver. Otherwise, the instrument continues to perform exceptionally,
taking solar data on all available orbital tracking periods. An average
of 59% of data were returned this week accounting for 420 minutes of
solar observing time.
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SUSIM
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SUSIM was turned off for the yaw around on Jan. 10. Before that,
the experiment successfully gathered daily mid (1.1 nm) resolution,
MgII, occultation, solar pointing offset, and continuous monitoring
scans for time periods with UARS telemetry or tape recording.
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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 01 January 2005 (Orbit 72835, GMT Day 001) through
07 January 2005 (Orbit 72939, GMT Day 007).
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
HALOE 001/1326 72843 POWER ON
PEM 001/2335 72849 AXIS OFF
PEM 006/2324 72924 ZEPS/NEPS DAY-ONLY TO OFF
The beta angle ranged between the angles of 48.0 degrees to 22.2
degrees for this report period. The beta angle is now decreasing
towards a minimum angle of 2.0 degrees on 12 January 2005 (DOY 012).
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 0.97 to 1.28 degrees C. Additional
battery performance data for each battery on 31 December 2004 and 07
January 2005 are provided in Appendix D.
The clock error ranged from 09.3 to -03.8 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
HALOE = 02
PEM = 02
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 01
One (1) Anomaly Report 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
The FOT continued their CMS software acceptance testing this week.
This testing will continue into the new year. The goal for completion
is no later than end of January 2005.
MEETINGS
-None this report period.
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 07 January 2005
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
72843 001/1326 05-001 HALOE POWER ON PT 1
72844 001/1509 05-002 HALOE POWER ON PT 2
72849 001/2335 05-003 PEM AXIS OFF
72924 006/2324 05-004 PEM ZEPS/NEPS DAY-ONLY TO OFF
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 07 January 2005
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 07 January 2005
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
-NONE THIS REPORT PERIOD.
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 07 January 2005
31 December 2004 - GMT Day 366 Beta = 79.4 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 -3.68/-4.62 +00.0/+00.0 07.0 0.00 0.0
2 44.8/ -11.2 +4.51/+3.87 +23.2/-14.4 26.7 1.05 16.7
3 -11.2/ -89.6 +3.23/+2.60 +22.0/-13.6 26.7 1.04 16.1
07 January 2005 - GMT Day 007 Beta = 22.2 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/ -33.6 +6.44/+5.47 +29.6/-14.0 26.2 1.04 20.0
3 -11.2/-190.4 +5.15/+3.87 +28.0/-13.2 26.2 1.03 19.0
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
-NONE THIS REPORT PERIOD.
APPENDIX E
UARS ANOMALY REPORTS
Week ending 07 January 2005
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
05-001 FOT 72843 001/1326 30832 Generic Late Acquisition
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
04-090 FOT See List Dec 04 30832 Generic Late Acquisition
04-094 FOT 72814 365/1550 30853 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
------ ------ ----- ---- --- -----------------
05-001 FOT 72843 001/1326 30832 Generic Late Acquisition