******************************************************************** UARS WEEKLY STATUS REPORT - 18 JUL 2003 ******************************************************************** *********** SOLSTICE *********** Nothing received. *********** SUSIM *********** On Thursday July 17, SUSIM gathered little or no solar data because the no sun commands were received from the SSPP. For the remaining days this past week, 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. SUSIM successfully completed its major, "yearly" (4 lamp) calibration last week. SUSIM is now operating with a new MgF2 entrance filter used for the short wavelength half of the UV spectrum. *********** 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 2002089 has been reprocessed and archived at the GSFC DAAC. HEPSA data files for 2002090 through 2002099 are awaiting archiving at the GSFC 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 *********** 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 05 July 2003 (Orbit 64623, GMT Day 186) through 11 July 2003 (Orbit 64727, GMT Day 192). 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 WINDII 188/1808 64664 POWER ON WINDII 189/0022 64668 POWER OFF HRDI 189/1543 64678 POWER ON PEM 192/1355 64723 POWER ON The beta angle ranged between the angles of 79.1 degrees to 64.0 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 0 degrees on 26 July 2003 (DOY 207). 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 0.54 to 0.94 degrees C. Additional battery performance data for each battery on 04 July and 11 July 2003 are provided in Appendix D. The clock error ranged from -12.2 to 10.9 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 = 06 SUSIM = 01 WINDII = 03 HRDI = 01 PEM = 01 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 02 Two (2) 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 TMON-1 tripped onboard UARS on 07 July 2003 at approximately 189/0022 GMT. A WINDII turn on was executed about 4 orbits earlier, which brought the load bus down to 23.5 and caused TMON-1 to trip. TMON-1 powered off both WINDII and HRDI. HRDI was in standby mode and not taking data at the time, but WINDII's science collection was terminated. The UARS power subsystem recovered on the following orbit and HRDI was rebooted on 07 July 2003 at on the 189/1643 GMT event. It turns out that the HRDI reboot cleared a HDRI operation error that had been seen for the last month. Also this week, IPNOC took over management of the CISCO switches on 08 July 2003. This required some minor configuration changes to be made to the switches and a reboot of the servers. The ground system has run without incident since the change and IPNOC will now be able to troubleshoot network anomalies more thoroughly. MEETINGS - None this report period FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 26 July 2003 (DOY 207). 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 11 July 2003 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 64639 187/0210 03-168 OBC/CLK CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 64662 188/1406 03-169 SUSIM UPCMDARG FIX 64664 188/1808 03-170 WINDII POWER ON 64668 189/0022 03-171 WINDII POWER OFF (LOW POWER) 64669 189/0056 03-172 OBC/CLK CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 64675 189/1109 03-173 MPS CLEAR TMONS 64676 189/1221 03-174 WINDII MUB DISABLE 64678 189/1543 03-175 HRDI POWER ON 64678 189/1625 03-175 HRDI POWER ON / PMON GRP ENABLE 64703 191/0740 03-176 OBC/CLK CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 64722 192/1355 03-177 OBC/CLK CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 64722 192/1355 03-178 PEM AXIS POWER ON 64723 192/1617 03-179 OBC/CLK CLK ADJ FR 20.6 TO 0.0 MSEC/DAY APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 11 July 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 11 July 2003 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 64639 187/0213 CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 64669 189/0056 CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 64703 191/0740 CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 64722 192/1355 CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 64723 192/1617 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 11 July 2003 04 July 2003 - GMT Day 185 Beta = 77.4 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 -2.11/-3.05 +00.0/-00.0 07.2 0.000 0.0 2 +05.6/-50.4 +2.92/+1.34 +12.8/-13.6 26.2 1.030 10.4 3 +22.4/-05.6 +1.97/+0.71 +12.8/-13.6 26.2 1.020 10.3 11 July 2003 - GMT Day 192 Beta = 64.0 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 -700.0/-700.0 -2.73/-4.31 +00.0/-00.0 07.2 0.000 0.0 2 +00.0/-33.6 +3.14/+2.60 +20.0/-13.6 26.4 1.020 17.0 3 +16.8/-22.4 +2.60/+1.66 +19.2/-13.2 26.4 1.010 16.0 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 11 July 2003 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-031 FOT 64641 187/0431 30832 Generic Late Acquisition 03-033 FOT 64668 189/0022 N/A PMON-1 tripped due to low pwr ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-030 FOT 64519 179/0254 33093 Tlm dropout 2:28 03-032 FOT 64596 184/0436 30824 Fwd Link Failover 2:27 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 ------ ------ ----- ---- --- ----------------- 03-031 FOT See List July 03 30832 Generic Late Acquisition 03-033 FOT 64668 189/0022 N/A PMON-1 tripped due to low pwr