******************************************************************** UARS WEEKLY STATUS REPORT - 13 OCT 2000 ******************************************************************** *********** SOLSTICE *********** SOLSTICE is in good health, collecting solar data on all available orbital tracking periods and stellar calibration observations whenever possible. Our solar data is not affected by the larger than normal pointing errors since they are within our calibrations. Additionally, we continue to gather enough data to meet all the SOLSTICE science objectives during this period of reduced tape recorder operations. However, level2 processing is halted due to deficiencies in the OA_SSPP_ATT service. CDHF and CSC personnel are working on the problem and plan to have a patch by the end of October. *********** SUSIM *********** SUSIM continues to gather a normal set of daily solar scans scheduled for predicted periods of UARS telemetry. We are preparing to begin to reprocess the SUSIM UV spectral irradiances to data version V21 in the next few weeks. *********** ACRIM *********** Nothing received. *********** PEM *********** The PEM zenith spectrometers are activate in daylight mode. 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). 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 *********** 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 coordinate with the Flight Operations Team and to assist the Project Scientist in the scheduling of instrument operations. The UARS calendar for year 2001 is now available on the UARS homepage, under "What's New" section. (http:/umpgal.gsfc.nasa.gov) *********** CDHF *********** HIGHLIGHTS UOAS OA_SSPP_ATT - Need to debug additional UOAS OA_SSPP_ATT gap scenarios: 2) gap at end of day, time change, no gap at begin of next day. 3) tests run in RSS need to be run in PDS mode and possibly Menu mode. - Need to code comparable fix in OA_SAT_ATT and test in debug. - Plan to have patch by end of month. DAAC DATA: - MLS Version 5 data is being previewed and loaded into the DAAC Transfer Tables. When all of the Version 5 has been loaded into the DAAC tables, various fields will need updated before DAAC (James Johnson) can reveal/ make available to the User Community. - Waiting response from WINDII that Version 11 Quality fields have been updated. UARS CDHF REHOST: - Successful processing on Rehost System: Attitude Extraction, Observatory Log, Sensor Extraction, HALOE, HRDI, MLS, SUSIM, Solstice, and WINDII. - SUSIM v7.2 software representative Ed Esfandiari notified parallel testing completed. *SUSIM responded with concerns regarding the output product which is being investigated. - HRDI v4.4 software representative Mr. Jim Raines was notified parallel testing completed. *HRDI responded and is still in process of validating the output product. - GPI V4.05 tested successfully against the HRDI V4.4 Level 3AL data. Frank Huang was requested to validate the GPI output product. *Frank responded with questions and some concerns. - SOLSTICE v4.62 software representative PI Barry Knapp has successfully validated the parallel testing output. - HALOE v4.82 software representative Mr. Lance Deaver was notified the parallel test days completed. *HALOE has responded that they see no major differences in the output product, but have 3 more species to check out and will respond further this week. Small differences are possibly attributed to interpolation routines. - WINDII V5.11A software representative Mr. Brian Solheim requested parallel processing on test days. Testing continues. - July data ingested on the Rehost System for NMC and UKMO was successfully previewed and loaded into the DAAC Transfer Tables. DAAC (James Johnson) has been notified to test his transfers. *********** FOT *********** REPORTING PERIOD This report covers 30 September 2000 (Orbit 49486, GMT Day 274) through 06 October 2000 (Orbit 49590, GMT Day 280). 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 HALOE 279/0532 49564 Off HALOE 279/0953 49566 On HALOE 280/1232 49584 Off HALOE 280/1555 49586 On The beta angle ranged between the angles of 44.1 degrees to 51.0 degrees for this report period. The beta angle is now decreasing toward a minimum angle of 2 degrees on 23 October 2000 (DOY 297). 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 0.9 to 1.0 degrees C. Additional battery performance data for each battery on 29 September 2000 and 06 October 2000 are provided in Appendix D. The clock error ranged from -12.7 to 11.8 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 = 01 ¥ 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 ¥ HALOE = 04 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. ¥ FOT = 01 Three (3) Anomaly Reports remained OPEN at the end of this report period (see Appendix E). TRANSPONDER FREQUENCIES: · Transponder A: 00/221 - 2287.496937 · Transponder B: 00/244 - 2287.499127 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 00/272 show the observatory data loss to be 298 hours, 29 minutes, 18.483 seconds (an increase of 2 minutes 18.252 seconds since the last report period). This is a 0.39 percent data loss which equals a 99.61 percent data capture for the mission. The increase of 2 minutes 18.252 seconds occurred over two (2) days: · 1 minute 20.672 seconds on Day 276 due to a data hit, · 0 minutes 58.840 seconds on Day 278 due to a data hit. OTHER SIGNIFICANT EVENTS UARS SATELLITE OPERATIONS The FOT powered off FHST-1 on 29 September 2000. The tracker will remain off and UARS will fly on FSS and gyros alone. Should the attitude start to drift the FOT has implemented a procedure to manually correct the attitude via an FDF calculated attitude correction. UARS will continue to fly in this manner until the TAM and FSS attitude control solution is put into place. Testing continues daily to get this mode operational. MEETINGS The FOT attended a meeting to discuss UARS attitude control on 02 and 04 October 2000. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for October 22, 2000 (DOY 297). 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 06 Oct 2000 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------- 49489 274/0525 00-525 NBTR NOOPS D274 49495 274/1250 00-526 OBC Clk Adj 20.6 to 0.0 msec/day 49497 274/1726 00-525 NBTR NOOPS D274 49497 274/1806 00-527 NBTR NOOPS D275 49512 275/1809 00-528 NBTR NOOPS D276 49520 276/0610 00-528 NBTR NOOPS D276 49526 276/1549 00-529 OBC GENASCII/ TABLE 51 49527 276/1811 00-530 NBTR NOOPS D277 49531 277/0052 00-531 OBC Clk Adj 0.0 to 20.6 msec/day 49535 277/0612 00-530 NBTR NOOPS D277 49540 277/1409 00-532 OBC GENASCII/TABLE 51 49543 277/1910 00-533 NBTR NOOPS D278 49544 277/2132 00-534 TAM2 GENASCII/TABLE 53 49549 278/0531 00-533 NBTR NOOPS D278 49555 278/1411 00-536 OBC GENASCII/TABLE 51 49556 278/1552 00-537 OBC GENASCII/TABLE 15 49557 278/1814 00-535 NBTR NOOPS D279 49564 279/0532 00-535 NBTR NOOPS D279 49564 279/0532 00-538 OBC Clk Adj 20.6 to 0.0 msec/day 49564 279/0532 00-539 HALOE POWER OFF/ TBAT HI 49566 279/0953 00-540 HALOE POWER ON 49570 279/1413 00-541 OBC GENASCII/TABLE 51 49572 279/1733 00-535 NBTR NOOPS D279 49572 279/1816 00-542 NBTR NOOPS D280 49579 280/0534 00-542 NBTR NOOPS D280 49584 280/1232 00-543 HALOE POWER OFF 49585 280/1415 00-544 OBC GYRO PREDICTS 49586 280/1555 00-545 HALOE POWER ON 49587 280/1817 00-546 NBTR NOOPS D281 _______________________________________________________________________________ APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 06 Oct 2000 The following Out-Of-Limits occurrences were detected: MNEMONIC STATE DESCRIPTION ORBITS --------- ----- ------------ ------ HATBAT Y-HI BOLOMETER AREA TMP 49581-82 The following ALERT occurrences were detected: MNEMONIC DESCRIPTION ORBITS --------- ------------ ------ -None this report period _______________________________________________________________________________ APPENDIX C CLOCK & SOLAR ARRAY RATE CORRECTIONS Week ending 06 Oct 2000 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ---- ----------------- 49495 274/1250 (30 September) from 20.6 to 0.00 msec/day 49531 277/0052 (03 October) from 0.00 to 20.6 msec/day 49564 279/0532 (05 October) from 20.6 to 0.00 msec/day ___________________________________________________________________________ APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 06 Oct 2000 29 Sept 2000 - GMT Day 273 Beta = 41.5 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 +728.0/+728.0 -3.05/-4.31 +0.0/+0.0 14.2 0.000 0.0 2 +16.8/-78.4 +5.47/+4.51 +27.2/-15.2 25.1 1.030 19.7 3 +16.8/-44.8 +4.51/+3.23 +27.2/-15.2 25.1 1.020 19.3 06 Oct 2000 - GMT Day 280 Beta = 51.6 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 +728.0/+728.0 -3.68/-4.62 +0.0/+0.0 14.2 0. 000 0.0 2 +16.8/-56.0 +4.83/+3.23 +24.8/-15. 2 25.4 1.040 20.5 3 +11.2/-72.8 +3.87/+2.29 +25.2/-15. 2 24.8 1.040 20.0 V/T LEVEL CHANGES ORB# TIME LVL FR-TO ----- ---------- ---------- no changes V/T 5 _______________________________________________________________________________ APPENDIX E UARS ANOMALY REPORTS Week ending 06 Oct 2000 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 00-042 FOT 49534 277/0529 14170 Generic Late Acq. ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 00-041 FOT see list Sept 00 14170 Generic Late Acq. 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 ------ ------ ----- ---- --- ----------------- 00-042 FOT see list Oct 00 14170 Generic Late Acq. 00-040 FOT 48854 231/2111 22831 Data Dropout 00-032 FHST 48211 188/2242 N/A FHST 2 Anomaly SEVNTFW00/40