******************************************************************** UARS WEEKLY STATUS REPORT - 05 NOV 2004 ******************************************************************** *********** SOLSTICE *********** This week, SOLSTICE was in daylight only operations from Monday (306) to mid-day on Thursday (309) 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 60% of data were returned this week accounting for 397 minutes of solar observing time per day. *********** SUSIM *********** SUSIM was powered down Nov. 1-3 to save power during the UARS yaw-around. Otherwise, the experiment successfully gathered daily mid (1.1 nm) resolution, MgII, occultation, solar pointing offset, and continuous monitoring scans for time periods with UARS telemetry or tape recording. *********** PEM *********** HEPSA data files are version 2. Currently, HEPSA data between 1991274 and 2004189 has been reprocessed and archived at the GSFC DAAC. HEPSA data files from 2004190 to 2004199 are processed and waiting for archiving. MEPS data files are version 1. Processed MEPS data files at the DAAC archive are between 1991274 and 2004179. MEPS data files from 2004180 to 2004199 are processed and waiting for archiving. PEM continues to receive NMC data files from NOAA. No problems have been encountered. 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. *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. *********** 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 23 October 2004 (Orbit 71782, GMT Day 297) through 29 October 2004 (Orbit 71886, GMT Day 303). 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 303/2315 71886 POWER OFF The beta angle ranged between the angles of 41.8 degrees to 14.5 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 0 degrees on 02 November 2004 (DOY 307). 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 0.63 to 0.65 degrees C. Additional battery performance data for each battery on 22 October and 29 October 2004 are provided in Appendix D. The clock error ranged from 10.6 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 = 02 HALOE = 01 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 08 Seven (7) Anomaly Reports remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION Eight (8) 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 This week the FOT took their first SMA pass with the real spacecraft. Even though the CMS is not able to receive the SMA contacts, the FOT was able to schedule an SMA event on the UPS. The test was successful with commands and dumps performing properly. Further use of the TDRS SMA service will be postponed until the transfer issue between UPS and CMS can be resolved. The few test SMA events, which were scheduled via the workaround feature on the UPS, were confirmed by scheduling this week. The test events were deleted by the FOT, but the test verified the successful execution of the workaround throughout the scheduling process. Therefore no modifications to the FDF-provided UAV file will be necessary. MEETINGS The FOT attended a meeting with FDF/Software Development on 21 October 2004 to discuss the rehost of FORMS 3 & 4 and the SMA issues. The rehost plan was given the go ahead, but action items were taken by FDF, sustaining engineering and software development to resolve the file transfer issue between the UPS and CMS. A follow up meeting is scheduled for 04 November 2004. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 02 November 2004 (DOY 307). 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 29 October 2004 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 71865 302/1336 04-307 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 71884 303/1944 04-308 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 71886 303/2315 04-309 HALOE POWER OFF (YAW) APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 29 October 2004 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 29 October 2004 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 71865 302/1343 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 71884 303/2000 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 29 October 2004 22 October 2004 - GMT Day 296 Beta = 42.4 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 -3.05/-4.31 +00.0/+00.0 07.0 0.00 0.0 2 11.2/- 50.4 +6.11/+5.14 +25.6/-15.6 26.2 1.04 19.6 3 -11.2/-168.0 +4.50/+3.87 +24.0/-15.2 26.2 1.03 18.8 29 October 2004 - GMT Day 303 Beta = 14.5 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 -700.0/-700.0 -3.05/-4.31 +00.0/+00.0 07.0 0.00 0.0 2 05.6/- 39.2 +5.79/+5.14 +28.4/-13.6 26.2 1.03 20.3 3 -56.0/- 56.0 +4.50/+3.87 +27.2/-13.6 26.2 1.02 19.6 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period APPENDIX E UARS ANOMALY REPORTS Week ending 29 October 2004 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 04-076 FOT 71783 297/0234 37341 Late Acquisition 04-066 FOT 71809 298/2040 30832 Generic Late Acquisition 04-077 FOT 71811 298/2220 37357 Multiple Data Dropouts 04-078 FOT 71826 299/2326 37358 DATA DROPOUTS 04-079 FOT 71834 300/1203 37396 TDRSS 275 Data Dropouts 04-066 FOT 71836 300/1525 30832 Generic Late Acquisition 04-080 FOT 71849 301/1200 37411 TDRSS 275 Dropouts 04-082 WSGT 71861 302/0647 37419 Drop Outs on the Return Link ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 04-073 FOT 71691 291/0026 37270 Data Drop Outs 04-074 FOT 71730 293/1330 37291 30 sec Data Dropout 04-075 FOT 71776 296/1549 N/A Canberra Antenna Problem 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 ------ ------ ----- ---- --- ----------------- 04-066 FOT See List Oct 04 30832 Generic Late Acquisition 04-076 FOT 71783 297/0234 37341 Late Acquisition 04-077 FOT 71811 298/2220 37357 Multiple Data Dropouts 04-078 FOT 71826 299/2326 37358 DATA DROPOUTS 04-079 FOT 71834 300/1203 37396 TDRSS 275 Data Dropouts 04-080 FOT 71849 301/1200 37411 TDRSS 275 Dropouts 04-082 WSGT 71861 302/0647 37419 Drop Outs on the Return Link