******************************************************************** UARS WEEKLY STATUS REPORT - 30 JUN 2000 ******************************************************************** *********** SOLSTICE *********** We continue to gather enough data to meet all the SOLSTICE science objectives during this period of reduced tape recorder operations. SOLSTICE operates normally, collecting solar data on all available orbital tracking periods and stellar calibration observations whenever possible. We have planned a special observation of Mercury for execution on Friday (June 30). Additional observations will be made later in the year when more observation time is available. Thanks to Rich Beck for his help. Level 2 processing is halted due to bugs in the OA_SSPP_ATT and OA_SAT_ATT services related to data gaps. CDHF and CSC personnel have released engineering patches to these routines and we are beginning to incorporate them into a test release of our production software. *********** SUSIM *********** SUSIM continues to gather a near normal set of daily solar scans scheduled for periods of predicted telemetry. *********** ACRIM *********** Nothing received. *********** PEM *********** Nothing received. *********** HALOE *********** Nothing received. *********** MLS *********** Nothing received. *********** HRDI *********** Nothing received. *********** WINDII *********** Nothing received. *********** MPG *********** Processing of instrument Daily Activity Plans continues with no problems. We are continuing to coordinated with the Flight Operations Team and to assist the Project Scientist in the scheduling of instrument operations. *********** CDHF *********** The CDHF processed current day data through level 3 for all active instruments. Additionally, CDHF personnel reprocessed: (R)= Requested (C) = Complete, (F)= Failed (L) = Days remaining to reprocess. - All requested reprocessing is complete as of this reporting period CDHF REHOST: - Successful processing on Rehost System: Attitude Extraction, Observatory Log, Sensor Extraction, HALOE, HRDI, MLS, SUSIM, Solstice, and WINDII. - Waiting validation results from the HRDI group on successful production testing done on the Rehost System. - System test is progress. *********** FOT *********** REPORTING PERIOD This report covers 17 June 2000 (Orbit 47912, GMT Day 169) through 23 June 2000 (Orbit 48017, GMT Day 175). 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 WINDII 170/0139 47928 Power ON WINDII 170/0721 47932 Power OFF WINDII 170/2023 47939 Power ON WINDII 171/0324 47944 Power OFF The beta angle ranged between the angles of 31.0 degrees to 31.3 degrees for this report period. The beta angle is now decreasing toward a minimum angle of 2.0 degrees on 04 July 2000 (DOY 186). 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 23.8 V end-of-night (EON) load bus voltage. Battery temperatures are stable with a temperature delta between Battery 2 and Battery 3 of 1.0 to 1.3 degrees C. Additional battery performance data for each battery on 16 June 2000 and 23 June 2000 are provided in Appendix D. The clock error ranged from -11.3 to 11.1 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 = 03 % ALERTS = 00 The following real-time command sheets were executed for the listed operational element(s) during this report period (see Appendix A). % FOT = 23 % WINDII = 04 % HALOE = 02 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. % FOT = 01 Four (4) Anomaly Reports remained OPEN at the end of this report period (see Appendix E). TRANSPONDER FREQUENCIES: - Transponder A: 00/145 - 2287.497008 - Transponder B: 00/152 - 2287.498920 GROUND SYSTEM OPERATION One (1) operational support problem occurred this period. Anomaly Reports are included in Appendix E. The data loss calculations supplied by Data Capture Facility (DCF) from mission start through UTC Day 00/174 show the observatory data loss to be 296 hours, 20 minutes, 7.713 seconds (an increase of 0 minutes 0.0 seconds since the last report period). This is a 0.40 percent data loss which equals a 99.60 percent data capture for the mission. OTHER SIGNIFICANT EVENTS UARS SATELLITE OPERATIONS The FOT will finally continue testing the new TMONs again next week. The coding changes lost in the UTTS disk crash have been reinserted and the scenario lost is in the process of being rebuilt. Once the TMONs have been thoroughly tested, they will be presented for review and approval before uplink. The FOT has begun writing the online procedure for safehold should it happen before the new TMONs are in place or during and OBC halt. This procedure will be tested on the simulator and put online for immediate execution should an anomalous condition take place. MEETINGS The FOT held a teleconference with Dave Lorenz and the FSW group to discuss the Multi-TDRS patch. Many options were discussed and the FOT and FSW group continue to look into the best method for implementing this patch. A decision for 3 or 4 TDRS will be given at the next FSW CCB. The FOT attended a meeting to review the TMON trip on day 159. Lessons learned and future best practices were discussed to avoid this problem in the future. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for July 04, 2000 (DOY 186). This maneuver will be a Reverse to Forward Flight maneuver (Southern Hemisphere viewing). Attachments: Appendix A, Real-time Commands 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 23 June 2000 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------- 47914 169/0320 00-278 NBTR PLAYBACK 47914 169/0356 00-278 NBTR NOOPS D-169 47923 169/1742 00-279 NBTR NOOPS D-170 47928 170/0139 00-280 WINDII Power ON 47930 170/0502 00-279 NBTR NOOPS D-170 47930 170/0540 00-279 NBTR PLAYBACK 47932 170/0721 00-281 WINDII Power OFF - S/C LOW POWER 47938 170/1744 00-282 NBTR NOOPS D-171 47939 170/2023 00-280 WINDII Power ON 47944 171/0324 00-281 WINDII Power OFF - S/C LOW PWR 47944 171/0324 00-282 NBTR PLAYBACK 47945 171/0504 00-282 NBTR NOOPS D-171 47953 171/1747 00-283 NBTR NOOPS D-172 47959 172/0326 00-283 NBTR PLAYBACK 47960 172/0506 00-283 NBTR NOOPS D-172 47968 172/1847 00-284 NBTR NOOPS D-173 47969 172/1929 00-285 OBC Clk Adj 0.00 to 20.6 msec/day 47974 173/0328 00-284 NBTR PLAYBACK 47975 173/0508 00-284 NBTR NOOPS D-173 47982 173/1609 00-284 NBTR NOOPS D-174 47989 174/0329 00-286 NBTR PLAYBACK 47990 174/0509 00-287 OBC Clk Adj 20.6 to 0.00 msec/day 47990 174/0549 00-286 NBTR NOOPS D-174 47995 174/12:43 00-289 HALOE FOV test 47995 174/1347 00-290 HALOE Reset FOV 47998 174/1758 00-288 NBTR NOOPS D-175 48004 175/0331 00-288 NBTR PLAYBACK 48006 175/0648 00-288 NBTR NBTR NOOPS D-175 48013 175/1953 00-292 NBTR NBTR NOOPS D-176 _______________________________________________________________________________ APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 23 June 2000 The following Out-Of-Limits occurrences were detected: MNEMONIC STATE DESCRIPTION ORBITS --------- ----- ------------ ------ HRPSEQBIMON Y-HI PSE QB Current Mon 47914-17 HRPTSPBIMON R-LO PTS PB Current Mon 47916-7 HRPSEQBIMON Y-HI PSE QB Current Mon 47930 The following ALERT occurrences were detected: MNEMONIC DESCRIPTION ORBITS --------- ------------ ------ -None this report period _______________________________________________________________________________ APPENDIX C CLOCK & SOLAR ARRAY RATE CORRECTIONS Week ending 23 June 2000 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ---- ----------------- 47969 172/19:29 (20 June 00) from 0.00 to 20.6 msec/day 47990 174/05:09 (22 June 00) from 20.6 to 0.00 msec/day _______________________________________________________________________________ APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 23 June 2000 16 June 2000 - GMT Day 168 Beta = 31.0 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 +39.2/+11.2 -2.42/-3.68 +0.0/+0.0 15.7 0.000 0.0 2 +28.0/-28.0 +7.09/+5.15 +28.8/-15.2 23.8 1.030 23.0 3 +22.4/-78.4 +5.47/+4.19 +28.4/-15.2 23.7 1.028 22.0 23 June 2000 - GMT Day 175 Beta = 31.3 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 +39.2/+11.2 -3.05/-4.31 +0.0/+0.0 15.7 0.000 0.0 2 +16.8/-56.0 +5.47/+4.51 +28.8/-14.4 25.1 1.040 20.7 3 +22.4/-28.0 +4.51/+3.23 +28.0/-14.4 25.1 1.037 20.5 V/T LEVEL CHANGES ORB# TIME LVL FR-TO ----- ---------- ---------- no changes V/T 5 ______________________________________________________________________________ APPENDIX E UARS ANOMALY REPORTS Week ending 23 June 2000 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 00-027 FOT 47928 170/0215 22524 Late Acq./Data Loss ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- -None this report period ANOMALY INVESTIGATION REPORTS GENERATED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- -None this report period OPEN ANOMALY REPORTS AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 99-064 FOT 44135 10/8-9/99 N/A HRDI Cal Lamp Errors 99-071 FOT 44398 299/1212 21512 TPF Not Receiv 512 00-026 FOT see list June 00 14170 Generic Late Acq. 00-027 FOT 47928 170/0215 22524 Late Acq./Data Loss SEVNTFW00/25