******************************************************************** UARS WEEKLY STATUS REPORT - 12 Sep 2003 ******************************************************************** *********** SOLSTICE *********** During this week, SOLSTICE continued to operate in good health gathering solar data on all available orbital tracking periods. We received about 50% of the gathered data and 400 minutes of solar data per day. *********** SUSIM *********** SUSIM successfully gathered all of its daily mid resolution, weekly offset, and O2 occultation scans during periods of UARS telemetry or periods of onboard tape recording. *********** ACRIM *********** Nothing received. *********** 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. 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 2002159 has been reprocessed and archived at the GSFC DAAC. HEPSA data files from 2002160 through 2002179 and from 2002230 through 2002239 are processed and awaiting archiving at the DAAC. 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. 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 *********** A revised version of the UARS movie has been installed on the UARS Science Web Page: http://umpgal.gsfc.nasa.gov under "UARS Movies". 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 a meeting on 10 September which was held to discuss current status of the effort to modify UARS ground station and flight software so that UARS can use 3 TDRS satellites each orbit. *********** CDHF *********** Nothing received. *********** FOT *********** REPORTING PERIOD This report covers 30 August 2003 (Orbit 65465, GMT Day 242) through 05 September 2003 (Orbit 65570, GMT Day 248). 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 PEM 243/1331 65488 POWER ON ZEPS/NEPS DAYOPS HALOE 244/1328 65503 POWER ON HRDI 245/0646 65514 F/T TO DAY ONLY (LOW PWR) HRDI 245/1549 65520 FULL-TIME OPERATIONS The beta angle ranged between the angles of 10.9 degrees to 34.8 degrees for this report period. The beta angle is now increasing towards a maximum angle of 60 degrees on 15 September 2003 (DOY 258). 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 0.96 to 1.28 degrees C. Additional battery performance data for each battery on 29 August and 05 September 2003 are provided in Appendix D. The clock error ranged from -11.2 to 11.3 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 SUSIM = 01 PEM = 01 HALOE = 03 HRDI = 02 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 05 Two (2) Anomaly Reports remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION Five (5) 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 patch to the Eclipse scripting executable (CECIL.exe) was installed on the operational servers on 28 August 2003. This was done to correct for the error found in certain IF and WAIT statement combinations. Since the installation, no occurrences of the problem have been seen. MEETINGS -None this report period FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 03 October 2003 (DOY 276). This maneuver will be a Forward to Reverse Flight maneuver (Northern Hemisphere viewing). Attachments: Appendix A, 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 05 September 2003 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 65473 242/1235 03-227 SUSIM POWER ON (COMPLETE) 65488 243/1331 03-228 PEM POWER ON ZEPS/NEPS DAY-OPS 65493 243/2038 03-229 OBC/CLK CLK ADJ FT 0.0 TO -20.6 MSEC/DAY 65503 244/1328 03-230 HALOE POWER ON 65506 244/1740 03-231 HALOE POWER ON - PART 2 65511 245/0127 03-232 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 65514 245/0646 03-233 HRDI F/T TO DAY ONLY (LOW POWER) 65519 245/1406 03-234 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 65520 245/1549 03-235 HRDI FULL-TIME OPERATIONS 65532 246/1142 03-236 OBC/CLK CLK ADJ FR 20.6 TO 0.0 MSEC/DAY 65534 246/1403 03-237 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 65550 247/1547 03-238 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 65554 247/2157 03-239 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 65569 248/2155 03-240 HALOE ADJUST SR AZIMUTH POSITION APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 05 September 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 05 September 2003 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 65493 243/2038 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 65511 245/0127 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 65519 245/1406 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 65532 246/1145 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY 65534 246/1403 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 65550 247/1549 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 65554 247/2207 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 05 September 2003 29 August 2003 - GMT Day 241 Beta = 06.9 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 +11.2/-44.8 +5.47/+4.51 +28.0/-50.0 25.1 0.970 20.6 3 +22.4/-67.2 +4.19/+3.23 +27.2/-50.0 25.0 0.970 20.3 05 September 2003 - GMT Day 248 Beta = 34.8 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. -3.05/-4.31 +00.0/+00.0 07.2 0.000 0.0 2 +11.2/-140.0 +5.79/+4.51 +27.6/-15.2 24.3 1.030 21.2 3 +11.2/-112.0 +4.83/+3.87 +27.2/-15.2 24.3 1.020 21.0 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 05 September 2003 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-037 FOT 65488 243/1331 30832 Generic Late Acquisition 03-046 FOT 65500 244/0722 30832 Generic Late Acquisition 03-046 FOT 65511 245/0213 30832 Generic Late Acquisition 03-046 FOT 65516 245/1004 30832 Generic Late Acquisition 03-047 FOT 65554 247/2157 33666 Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-037 FOT See List August 03 30832 Generic Late Acquisition 03-045 FOT 65382 236/1124 N/A Telemetry hits/load abort 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 ------ ------ ----- ---- --- ----------------- 03-046 FOT See List September 0330832 Generic Late Acquisition 03-047 FOT 65554 247/2157 33666 Late Acquisition