******************************************************************** UARS WEEKLY STATUS REPORT - 13 Dec 2002 ******************************************************************** *********** SOLSTICE *********** Nothing received. *********** 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. *********** ACRIM *********** Nothing received. *********** 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 *********** Nothing received. *********** MLS *********** Nothing received. *********** HRDI *********** Nothing received. *********** WINDII *********** Nothing received. *********** 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. *********** CDHF *********** Nothing received. *********** FOT *********** 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