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UARS WEEKLY STATUS REPORT - 29 July 2005
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SOLSTICE
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SOLSTICE began day only operations on Tuesday 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 68% of data were returned this week accounting
for 518 minutes of solar observing time. We're planning one final
offset calibration prior to the end of SOLSTICE operations.
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SUSIM
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SUSIM has successfully gathered daily mid (1.1 nm) resolution,
MgII, and continuous monitoring scans for time periods with UARS
telemetry or tape recording.
SUSIM's last measurements are scheduled for August 1 at the end of
a three day calibration sequence using all lamps and reference
channels.
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PEM
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HEPSA data files are version 2. Currently, HEPSA data between 1991274
and 2004273 has been reprocessed and archived at the GSFC DAAC. HEPSA data
between 2004274 and 2005079 has been processed and is waiting for archival
at the DAAC.
MEPS data files are version 1. Processed MEPS data files at the DAAC
archive are between 1991274 and 2004259. MEPS data between 2004260 and
2005079 has been processed and is waiting for DAAC archival. MEPS data for
2005080 to 2005089 is currently being processed.
HEPSB data files are version 1. HEPSB processing code has been generated
and is currently under initial testing.
PEM continues to receive NMC data files from NOAA. No problems have
been encountered since updates have occurred.
The PEM data from the GUVI conjunction periods may be found at
http://wwwpem.space.swri.edu/guvi-pem.html. The additional electron data for
the October and November storms of 2003 has been moved and is now located at
http://climatology.space.swri.edu/uars_fromRudy.html. For those users of
SDDAS, update your UARS Meta data and these data times will appear
with full functionality. Proton data from these storms are now located at
http://climatology.space.swri.edu/UARS_images_from_Rudy_(Apr._2004).html
Requests have been received for storm spectral data. Overview plots were
produced and these plots may be found on the web at
http://climatology.space.swri.edu/UARS_images_postedJune2004.html
for the storms of October 29 of 1991, November 8-9 of 1991, April 6-7 of 2000,
March 31 - April 1 of 2001, April 11-12 of 2001, November 6-7 of 2001, and
November 11-12 of 2001.
PEM has received a request for data from the super storm of November
2004. The Dst value showed sudden commencement early on November 7, 2004
reaching a Dst value of about -380 gamma early on November 8, 2004.
PEM was not active at that time and became active late on November 8, 2004
in day only mode. A second peak of about -280 gamma was observed on November
11, 2004. PEM became active in day-light only mode late on November 8. PEM
survey spectrograms for November 8-18 of 2004 may be found at:
http://climatology.space.swri.edu/UARS_images_fromRudy.html
*Beginning of power orbit day (PEM activation): array current >5 amps, array
voltage >53.5 volts, and battery current >2.0 amps.
End of power orbit day (PEM deactivation): time in power orbit day >4 minutes,
array current <9 amps, and battery currents <0.2 amps.
Power orbit day variation: ~39-40 min at yaw to ~50-51 min at maximum beta.
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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 16 July 2005 (Orbit 75783, GMT Day 197) through
22 July 2005 (Orbit 75888, GMT Day 203).
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 197/1251 75791 POWER ON
SUSIM 199/1312 75821 POWER ON
PEM 201/1338 75852 POWER ON - DAY ONLY
PEM 203/1303 75881 POWER OFF
The beta angle ranged between the angles of 19.1 degrees to 35.6
degrees for this report period. The beta angle is now increasing
towards a maximum angle of 37 degrees on 24 July 2005 (DOY 205).
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 5.56 to 5.18 degrees C. Additional
battery performance data for each battery on 15 July 2005 and 22 July
2005 are provided in Appendix D.
The clock error ranged from 11.2 to -12.5 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 = 07
HALOE = 02
SUSIM = 01
PEM = 02
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 04
Three (3) Anomaly Reports remained OPEN at the end of this report
period (see Appendix E).
GROUND SYSTEM OPERATION
Three (3) 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
On Monday 11 July 2005 the results of the senior review at NASA HQ
were received. The direction given is that UARS will fly with HALOE
observations only until the end of the calendar year, followed by the
decommissioning of the UARS spacecraft in the new year. Final
calibrations for SUSIM will be performed before they are turned off
completely. UARS will fly with HALOE only after the clock rollover.
The UARS OBC clock rollover effort continued this week with more
testing and evaluation of all affected entities. The uplink is
scheduled for 02 August on the 214/1409-1435 event, with preliminary
setup commanding on the 214/1307 event. All impacted facilities
should take note of the uplink times and be prepared for the epoch
change.
MEETINGS
The FOT attended the weekly clock rollover meeting to review
activities that need to be finished by 02 August 2005. So far the
project is still on schedule. A few items still need to be completed
before the FOT is go for uplink. ORR for the transition will be held
on 01 August 2005.
FUTURE SIGNIFICANT EVENTS
The next UARS Yaw slew is scheduled for 9 August 2005 (DOY 221).
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 22 July 2005
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
75791 197/1251 05-220 HALOE POWER ON PART 1
75793 197/1647 05-221 HALOE POWER ON PART 2
75821 199/1244 05-222 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
75821 199/1312 05-223 SUSIM POWER ON
75834 200/1021 05-223 SUSIM POWER ON - COMPLETE
75837 200/1420 05-224 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
75842 200/2219 05-225 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
75852 201/1338 05-226 PEM POWER ON DAY-ONLY
75858 202/0033 05-227 OBC/CLK CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
75859 202/0216 05-228 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
75876 203/0505 05-229 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
75881 203/1303 05-230 PEM DAY-ONLY TO OFF
75884 203/1742 05-231 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 22 July 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 22 July 2005
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
75821 199/1249 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
75837 200/1424 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
75842 200/2221 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
75858 202/0043 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
75859 202/0225 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
75876 203/0505 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
75884 203/1746 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 22 July 2005
15 July 2005 - GMT Day 196 Beta = 19.0 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 39.2/ 11.2 -3.05/-4.31 +00.0/+00.0 05.8 0.00 0.0
2 0.0/-134.4 +8.07/+7.08 +32.0/-18.0 26.4 1.04 22.5
3 112.0/-700.0 +3.23/+2.60 +18.8/-10.0 26.2 1.06 12.3
22 July 2005 - GMT Day 203 Beta = 35.6 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 67.2/ 39.2 -2.42/-3.68 +00.0/+00.0 05.8 0.00 0.0
2 67.2/-100.8 +10.06/+8.73 +31.6/-20.8 25.8 1.04 24.2
3 156.8/-700.0 +4.50/+3.55 +19.2/-11.6 25.8 1.05 13.7
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
-NONE THIS REPORT PERIOD
APPENDIX E
UARS ANOMALY REPORTS
Week ending 22 July 2005
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
05-032 FOT 75794 197/1828 30832 Generic Late Acquisition
05-036 FOT 75831 200/0440 N/A ECLIPSE Command Hung-up
05-032 FOT 75831 200/0440 30832 Generic Late Acquisition
05-037 FOT 75859 202/0216 40172 Late Acq: bad weather @ Guam
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
05-034 FOT 75686 190/1258 40062 White Sands UPLINK Problem
05-035 SOLSTICE 75767 195/2238 N/A SOLSTICE in incorrect
state
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
------ ------ ----- ---- --- -----------------
05-032 FOT See List July 05 30832 Generic Late Acquisition
05-036 FOT 75831 200/0440 N/A ECLIPSE Command Hung-up
05-037 FOT 75859 202/0216 40172 Late Acq: bad weather @ Guam