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UARS WEEKLY STATUS REPORT - 13 Dec 2002
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SOLSTICE
***********
Nothing received.
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SUSIM
***********
SUSIM successfully gathered all of its daily 1.1 nm (mid) resolution
and MgII solar scans this past week during periods of predicted UARS
telemetry.
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ACRIM
***********
Nothing received.
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PEM
***********
***** Happy Holidays from PEM *****
The PEM web site has moved. It has a new URL. Access the PEM web site
using http://wwwpem.space.swri.edu. The PEM data from the GUVI conjunction
periods has moved to http://wwwpem.space.swri.edu/guvi-pem.html. It has been
discovered that this web site was not updated properly with the latest PEM
data plots. SwRI will investigate the problem.
Level 2 PEM HEPSA data files are being reprocessed for submission to the
DAAC. This data has been designated as version 2; however, there is no format
difference from the version 1 data format. Version 2 HEPSA data is being
generated because it was discovered that there exists processing errors within
some of the HEPSA version 1 data files. Thus, if you are using any HEPSA
version 1 data files from the DAAC, please replace them with the version 2
data files. Currently, HEPSA data between 1991274 and 1994039 has been
reprocessed. HEPSA data reprocessing continues but has been slowed
temporarily due to the Holidays.
PEM continues to work with the GUVI team on the diagnosis of data from
the first conjunction period. Analysis of the two conjunction passes showed
that the aurora as detected by GUVI was at higher latitude than UARS.
GUVI images from other times from the first conjunction period show spatial
regions that both GUVI and PEM sampled when aurora was present. Separation
is several minutes to 10's of minutes when both instruments saw aurora.
PEM has seen no aurora during the second conjunction period. Due to a
spacecraft anomaly, no PEM data was collected during the third conjunction
period.
A poster presentation on the GUVI-PEM comparison from the first
conjunction period is being presented at the American Geophysical Union Fall
Meeting. The poster is titled "Validation of the GUVI Auroral Radiance
Measurements Using the UARS/PEM Instrument" by R A Frahm, G Crowley,
L J Paxton, C H Jackman, A B Christensen, D J Strickland, D Morrison,
Y Zhang, H Kil, B C Wolven, J D Winningham, J R Sharber, S K Avery,
J D Craven, R R Meier, C I Meng, P R Straus, C Swenson, and R Waltersheid.
An additional presentation on the overall storm period titled "The Relative
Atmospheric Impacts and Energy Inputs of Precipitating Solar and
Magnetospheric Ion and Electron Populations during the 17-24 April 2002
Events" is being presented by J U Kozyra, D N Baker, G Crowley, D S Evans,
X Fang, R A Frahm, S G Kanekal, M W Liemohn, G Lu, G M Mason, R A Mewaldt,
L J Paxton, E C Roelof, and J D Winningham at the same meeting.
PEM continues to receive NMC data files from NOAA. No problems have
been encountered. NOAA has changed the binary structure of the NMC data and
PEM is now receiving two data streams, one in the original VAX format and the
other from their new binary format.
*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.
***********
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
***********
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 30 November 2002 (Orbit 61360, GMT Day 334) through
06 December 2002 (Orbit 61465, GMT Day 340).
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
ACRIM 334/0132 61361 POWER ON QB B ON / QB A OFF
ACRIM 334/1301 61369 POWER ON QB A ON / QB B OFF
ACRIM 335/0100 61376 POWER ON QB B ON / QB A OFF
ACRIM 335/1300 61384 POWER ON QB A ON / QB B OFF
ACRIM 336/0059 61391 POWER ON QB B ON / QB A OFF
ACRIM 337/1759 61417 POWER OFF
PEM 337/2200 61419 POWER OFF, ZEPS/HEPS/AXIS
WINDII 337/2200 61419 POWER OFF
HRDI 338/0129 61421 PB (INST) OFF
SOLSTICE 338/0316 61423 POWER OFF
SUSIM 338/0316 61423 POWER OFF
HALOE 338/0418 61423 POWER OFF
HALOE 338/1437 61430 POWER ON
SOLSTICE 338/1839 61432 POWER ON
SUSIM 338/1937 61433 POWER ON
PEM 339/1307 61444 POWER ON AXIS-1
PEM 339/1435 61445 ZEPS/NEPS DAY-ONLY
The beta angle ranged between the angles of 34.6 degrees to 33.5
degrees for this report period. The beta angle is now decreasing
towards a minimum angle of 0 degrees on 18 December 2002 (DOY 352).
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 1.28 degrees C. Additional
battery performance data for each battery on 29 November and 06
December 2002 are provided in Appendix D.
The clock error ranged from -12.2 to 10.1 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 = 04
ACRIM = 02
PEM = 03
WINDII = 01
HRDI = 02
SOLSTICE = 02
SUSIM = 02
UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.
FOT = 02
Three (3) Anomaly Report 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 Solar Eclipse on 04 December 2002 passed with no affect. The plan
to power down all instruments and change to VT-6 for the 3 orbits of
the eclipse was a success. When power was back up to nominal levels
the FOT started turning on the instruments that were scheduled to be
on.
A new Eclipse build (version 1.5.1) was tested this week. The
build has fixed 2 DR's and has a few outstanding DR's that have yet to
be resolved. Raytheon has been asked to provide a new build by mid
January for the FOT to test. Raytheon has also provided the FOT with
a fixed conversion tool which will allow the FOT to convert .OMI bank
dumps into uplinkable loads. With this tool in place the FOT will now
begin testing the OBC image from the OBC halt on the simulator.
MEETINGS
-None this report period.
FUTURE SIGNIFICANT EVENTS
The next UARS Yaw slew is scheduled for 18 December 2002 (DOY 352).
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 06 December 2002
ORBIT AOS NO. SUBSYS REASON
----- --- --- ------ ------
61361 334/0132 02-462 ACRIM POWER ON QB B ON/ A OFF
61369 334/1301 02-461 ACRIM POWER ON QB A ON/ B OFF
61376 335/0100 02-462 ACRIM POWER ON QB B ON/ A OFF
61384 335/1300 02-461 ACRIM POWER ON QB A ON/ B OFF
61391 336/0059 02-462 ACRIM POWER ON QB B ON/ A OFF
61417 337/1759 02-468 ACRIM POWER OFF
61419 337/2200 02-466 PEM POWER OFF, ZEPS/HEPS/AXIS
61419 337/2200 02-467 WINDII POWER OFF
61420 337/2342 02-469 HRDI MICROLOADS
61421 338/0129 02-470 HRDI PB (INST) OFF
61423 338/0316 02-471 SOLSTICE POWER OFF
61423 338/0316 02-472 SUSIM POWER OFF
61423 338/0418 02-473 HALOE POWER OFF
61424 338/0500 02-474 MPS VT LEVEL 6
61428 338/1109 02-474 MPS VT LEVEL 5
61428 338/1142 02-475 SSPP RESET
61430 338/1437 02-476 HALOE POWER ON
61431 338/1659 02-477 PMON RESET BATTERY SOC
61432 338/1839 02-478 OBC CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
61432 338/1839 02-479 SOLSTICE POWER ON
61433 338/1937 02-480 SUSIM POWER ON
61444 339/1307 02-482 PEM POWER ON AXIS 1
61445 339/1435 02-483 PEM ZEPS/NEPS DAY-ONLY
61452 340/0126 02-484 OBC CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 06 December 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 06 December 2002
CLOCK DRIFT RATE ADJUSTMENTS
ORBIT TIME CLOCK RATE CHANGE
----- ----- -----------------
61432 338/1841 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
61452 340/0128 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 06 December 2002
29 November 2002 - GMT Day 333 Beta = 31.4 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 -156.8/-179.2 -3.05/-3.99 +00.0/+00.0 08.4 0.000 0.0
2 +05.6/-123.2 +6.43/+5.14 +28.8/-15.2 25.0 1.040 22.0
3 +22.4/-67.2 +5.14/+3.87 +28.4/-16.0 24.8 1.030 21.5
06 December 2002 - GMT Day 340 Beta = 33.5 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 -156.8/-179.2 -3.05/-4.31 +00.0/+00.0 08.3 0.000 0.0
2 +11.2/-33.6 +5.79/+4.51 +27.2/-14.4 25.1 1.040 21.2
3 +22.4/-44.8 +5.15/+3.87 +26.4/-13.6 25.1 1.030 20.7
V/T LEVEL CHANGES
ORB# AOS TIME LVL FR-TO
----- -------- ---------
61424 338/0500 L5 -> L6
61428 338/1109 L6 -> L5
APPENDIX E
UARS ANOMALY REPORTS
Week ending 06 December 2002
NEW ANOMALY REPORTS GENERATED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
02-059 FOT 61414 337/1257 30832 Generic Late Acquisition
02-060 FOT 61421 338/0057 N/A PSU Cmd Clock Timeout
ANOMALY CLOSURE INFORMATION RECEIVED
AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS
------ ------ ----- ---- --- -----------------
02-059 FOT 61414 337/1257 30832 Generic 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
------ ------ ----- ---- --- -----------------
02-058 FOT 61113 317/1341 N/A NEG ACQ / UFLTR ERROR
02-059 FOT 61414 337/1257 30832 Generic Late Acquisition
02-060 FOT 61421 338/0057 N/A PSU Cmd Clock Timeout