******************************************************************** UARS WEEKLY STATUS REPORT - 09 MAR 2001 ******************************************************************** *********** SOLSTICE *********** SOLSTICE continues to operate normally, taking solar data on all available orbital tracking periods and stellar calibration observations whenever possible. We continue to gather enough data to meet all the SOLSTICE science objectives during this period of reduced tape recorder operations. *********** SUSIM *********** SUSIM performed its daily solar scans of the sun this past week during periods of predicted UARS telemetry. *********** ACRIM *********** Nothing received. *********** PEM *********** At the present time, PEM energy deposition from its spectrometers is not being generated. Recent data configuration changes have affected PEM software causing multiple failures. These failures are being reviewed by the PEM team. In order to correct for new telemetry requirements, PEM will need to update processing code with a patch delivery. The delivery patch may include changes which would allow the PEM software to execute on a DEC Alpha machine. GSFC is helping PEM with some DEC Alpha particulars which have caused PEM level 3 code to fail on DEC Alpha machines (software below level 3 executes on the DEC Alpha). The PEM team is working on replacing the PEM:: machine with a DEC Alpha machine to be called PEM2K::. PEM has requested DAP command capability with the CMS from PEM2K::. Tests of the NRT data transfer from CDHF2:: through PEM2K:: to the unix computer running the PEM GSE software show no difference between equivalent NRT files transferred from PEM::. Thus, NRT data from CDHF2:: is captured correctly on PEM2K::. Tests of the NRT data transfer from CDHFB:: were not successful from both PEM:: and PEM2K::. Results of the test of NRT data transfers from the rehost computer acted like the rehost computer did not recognize either PEM machine. Investigation is underway. Updated HEPS calibration parameters have been finalized and are ready for delivery. Updated MEPS quality calibration files have been finalized and are ready for delivery. Level 3 software errors, discovered by Dr. Dean Pesnell, have been fixed; his suggestions have been incorporated with in the PEM production code. Both updated HEPS and MEPS calibration data, along with the Level 3 code changes, will influence the in-situ energy deposition predictions, so new versions of PEM energy deposition Level 3 files will be generated. *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 *********** The HALOE instrument continues to perform well. Nearly every scan is being acquired by the combination of the tape recorder and the TDRS contacts. The HALOE Team convened its quarterly validation meeting on March 1, and the data for the period October 1 to December 31, 2000, have been certified for scientific study. Because the HF profile data are occasionally corrupted by the presence of sunspots in the field-of-view for that channel, particularly during this solar max period, users of the HF data are cautioned to check the quality flags in the HALOE data record for those occurrences. *********** MLS *********** Nothing received. *********** HRDI *********** HRDI continues to function normally, making wind measurements during the sunlit parts of orbits nearly every day, and measuring nighttime winds when power is available. *********** WINDII *********** Nothing received. *********** MPG *********** The MPG participated in the Monthly Status Review meeting for UARS held on 7 March 2001. Daily processing of instrument Daily Activity Plans continues with no problems. Instrument operations schedule is now complete to 19 April 2001. *********** CDHF *********** UARS CDHF REHOST: - NRT is still on old system. Still have some users with problems on Rehost. Intention is to wait until after the YAW on March 15. - The following software has been recompiled and relinked and PC is testing new executables. Status follows: - Attitude Extraction V7.3 successful and promoted to production mode. Output test files were promoted from _TEST to _PROD. Being processed on Current and Rehost Systems during parallel processing. - Sensor Extraction V5.0 successful and promoted to production mode. Being processed on Rehost System only per FDF. - Observatory Log V3.4 successful and promoted to production mode. Output test files were promoted from _TEST to _PROD. Being processed on Rehost System only. - HALOE V4.82 successful. HALOE has successfully validated the output product and has requested an older UARS DAY to process to be compared with day processed on current system. - HRDI V4.4 successful. Currently waiting validation results from PI. - GPI V4.05 successful. Currently waiting validation results from PI. - SUSIM V7.2 was successful against days designated by the SUSIM PI. SUSIM questions and concerns are being investigated. STATUS 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. 20 days SUS (7.2) PROD (22R-22C=0L) *********** FOT *********** REPORTING PERIOD This report covers 24 February 2001 (Orbit 51690, GMT Day 055) through 02 March 2001 (Orbit 51795, GMT Day 061). 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 -None this report period The beta angle ranged between the angles of 47.0 degrees to 44.8 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 2 degrees on 15 March 2001 (DOY 074). 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 0.6 and 0.9 degrees C. Additional battery performance data for each battery on 23 February 2001 and 03 March 2001 are provided in Appendix D. The clock error ranged from Ð10.6 to 10.5 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 = 25 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. ¥ FOT = 02 One (1) Anomaly Report remained OPEN at the end of this report period (see Appendix E). TRANSPONDER FREQUENCIES: · Transponder A: 00/316 - 2287.496493 · Transponder B: 01/027 - 2287.499274 GROUND SYSTEM OPERATION Two (2) operational support problems 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 01/060 show the observatory data loss to be 300 hours, 19 minutes, 59.848 seconds. This shows no change since the last report period This is a 0.39 percent data loss, which equals a 99.61 percent data capture for the mission. OTHER SIGNIFICANT EVENTS UARS SATELLITE OPERATIONS UARS is using both the Fine Sun Sensor (FSS) and the Three Axis Magnetometer (TAM) as inputs to UFLTR this week. The FOT is pleased with their performance, but continues to make adjustments to the TAM alignment to improve its performance and UARSÕ attitude. MEETINGS The FOT attended a UARS Shuttle Retrieval Presentation on Monday, February 25, 2001. The FOT attended a UARS Shuttle Retrieval Presentation on Wednesday, February 27, 2001. The FOT attended a UARS Flight Software Meeting on Thursday, March 01, 2001 FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 15 March 2001 (DOY 074). This maneuver will be a Forward to Reverse Flight maneuver (Northern 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 02 March 2001 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 51694 055/0624 01-119 NBTR NOOPS D-055 51697 055/1132 01-120 OBC Clk Adj 0.00 to 20.6 msec/day 51702 055/1824 01-121 NBTR NOOPS D-056 51711 056/0847 01-121 NBTR NOOPS D-056 51717 056/1825 01-122 NBTR NOOPS D-057 51722 057/0305 01-123 OBC Clk Adj 20.6 to 0.00 msec/day 51723 057/0446 01-122 NBTR NOOPS D-057 51739 058/0627 01-124 NBTR NOOPS D-058 51745 058/1547 01-127 OBC Dump S/W banks 51745 058/1507 01-125 OBC MAGMON update 51746 058/1647 01-128 OBC System table dumps 51747 058/1827 01-026 NBTR NOOPS D-059 51753 059/0448 01-129 OBC Clk Adj 0.00 to 20.6 msec/day 51755 059/0710 01-126 NBTR NOOPS D-059 51761 059/1648 01-130 OBC TAM alignment 51762 059/1828 01-131 NBTR NOOPS D-060 51768 060/0448 01-131 NBTR NOOPS D-060 51776 060/1649 01-131 NBTR NOOPS D-060 51777 060/1911 01-132 NBTR NOOPS D-061 51779 060/2233 01-133 OBC Clk Adj 20.6 to 0.00 msec/day 51784 061/0630 01-132 NBTR NOOPS D-061 51785 061/0813 01-132 NBTR NBTR PBK / RTS-58 51790 061/1510 01-134 MACS TAM ALIGNMENT 51791 061/1650 01-132 NBTR NOOPS D-061 51792 061/1830 01-135 NBTR NOOPS D-062 ___________________________________________________________________________ APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 02 March 2001 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 02 March 2001 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 51697 055/1135 Clk Adj from 0.00 to 20.6 msec/day 51722 057/0308 Clk Adj from 20.6 to 0.00 msec/day 51753 059/0452 Clk Adj from 0.00 to 20.6 msec/day 51779 060/2234 Clk Adj from 20.6 to 0.00 msec/day ___________________________________________________________________________ APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 02 March 2001 23 Feb 2001 - GMT Day 054 Beta = 45.3 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 +00.0/-22.4 -3.05/-4.62 +0.0/+0.0 13.0 0.000 0.0 2 +11.2/-22.4 +4.51/+3.23 +27.2/-13.6 26.4 1.030 19.5 3 +22.4/-22.4 +3.87/+2.60 +26.4/-13.6 26.2 1.030 19.5 03 Mar 2001 - GMT Day 062 Beta = 44.8 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 +16.8/+00.0 -3.68/-4.62 +0.0/+0.0 13.0 0.000 0.0 2 +16.8/-44.8 +5.15/+3.87 +26.8/-15.2 25.1 1.030 20.5 3 +22.4/-67.2 +4.51/+2.92 +26.4/-15.2 25.1 1.020 20.2 V/T LEVEL CHANGES ORB# TIME LVL FR-TO ---- ---- --------- -no changes V/T 5 _______________________________________________________________________________ APPENDIX E UARS ANOMALY REPORTS Week ending 02 March 2001 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 01-013 FOT 51763 059/2050 23669 TAC Crashed 01-014 FOT 51782 061/0206 14170 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 01-009 FOT see list Feb 01 14170 Generic Late Acquisition 01-013 FOT 51763 059/2050 23669 TAC Crashed 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 ------ ------ ----- ---- --- ----------------- 01-014 FOT see list Mar 01 14170 Generic Late Acquisition SEVNTFW01/08