******************************************************************** UARS WEEKLY STATUS REPORT - 3 Jun 2005 ******************************************************************** *********** SOLSTICE *********** Nothing received. *********** SUSIM *********** SUSIM remains powered off. *********** PEM *********** HEPSA data files are version 2. Currently, HEPSA data between 1991274 and 2004273 has been reprocessed and archived at the GSFC DAAC. HEPSA data between 2004274 and 2005039 has been processed and is waiting for archival at the DAAC. MEPS data files are version 1. Processed MEPS data files at the DAAC archive are between 1991274 and 2004259. MEPS data between 2004260 and 2005029 has been processed and is waiting for DAAC archival. MEPS data for 2005030 to 2005039 is currently being processed. PEM continues to receive NMC data files from NOAA. No problems have been encountered since updates have occurred. 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. PEM has received a request for data from the super storm of November 2004. The Dst value showed sudden commencement early on November 7, 2004 reaching a Dst value of about -380 gamma early on November 8, 2004. PEM was not active at that time and became active late on November 8, 2004 in day only mode. A second peak of about -280 gamma was observed on November 11, 2004. PEM became active in day-light only mode late on November 8. PEM survey spectrograms for November 8-18 of 2004 may be found at: http://climatology.space.swri.edu/UARS_images_fromRudy.html *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 21 May 2005 (Orbit 74940, GMT Day 141) through 27 May 2005 (Orbit 75045, GMT Day 147). 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 145/2249 75027 POWER OFF The beta angle ranged between the angles of 31.8 degrees to 08.9 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 0 degrees on 30 May 2005 (DOY 150). 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 5.11 to 4.45 degrees C. Additional battery performance data for each battery on 20 May 2005 and 27 May 2005 are provided in Appendix D. The clock error ranged from 10.8 to -9.9 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 = 05 HALOE = 01 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 02 Two (2) Anomaly Reports 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 This week the FOT continued to closely monitor the status of the batteries. The batteries maintained their VT-5 charge level until the 147/1948 event when level 6 was commanded. This was done in preparation for the low beta/yaw period. The MPS was again able to support HALOE throughout its turn on duration for this beta cycle as well as day-only SOLSTICE operations. Testing of the solar array drive resumed this week on 23 and 26 May 2005. The goal of the testing was to free the B side of the drive, so that the A side could be utilized. Two attempts were made each day to run through a series of slews to try to free the B side, but all attempts were unsuccessful. The FOT will analyze the results of these tests and try again next week. MEETINGS -None this report period. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 29 May 2005 (DOY 149). 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 27 May 2005 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 74982 143/1754 05-169 SADDE SADD TESTING 74983 143/1957 05-170 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 75002 145/0213 05-171 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 75015 145/2249 05-172 HALOE POWER OFF 75027 146/1744 05-173 SADDE SOLAR ARRAY TESTING 75043 147/1948 05-174 MPS VT LEVEL 6 (YAW) APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 27 May 2005 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 27 May 2005 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 74983 143/2003 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 75002 145/0225 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 27 May 2005 20 May 2005 - GMT Day 140 Beta = 30.6 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 11.2/ -05.6 -3.05/-4.63 +00.0/+00.0 05.8 0.00 0.0 2 257.6/ -56.0 +9.72/+8.39 +33.6/-20.8 25.1 1.04 24.4 3 201.6/-700.0 +2.91/+2.28 +18.0/-13.2 25.1 1.05 12.6 27 May 2005 - GMT Day 147 Beta = 08.9 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 16.8/ -05.6 -4.31/-5.26 +00.0/+00.0 05.8 0.00 0.0 2 11.2/-123.2 +7.08/+5.79 +33.2/-18.8 25.3 1.03 23.5 3 72.8/-700.0 +1.97/+1.34 +19.6/-12.0 25.3 1.05 12.6 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- 75043 147/1948 LV5 -> LV6 APPENDIX E UARS ANOMALY REPORTS Week ending 27 May 2005 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 05-029 FOT 74949 141/1423 39569 NO ODMS 05-028 FOT 74973 143/0438 30832 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- -None this report period. 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 ------ ------ ----- ---- --- ----------------- 05-028 FOT See List May 05 30832 Generic Late Acquisition 05-029 FOT 74949 141/1423 39569 NO ODMS