******************************************************************** UARS WEEKLY STATUS REPORT - 03 Mar 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. *********** SUSIM *********** SUSIM continues to gather a near normal set of daily solar scans that are scheduled for periods of predicted telemetry. *********** ACRIM *********** Nothing received. *********** PEM *********** The PEM spectrometers continue to be active under PMON control*. AXIS-2 was activated on February 29 to complete the total AXIS activation. At the present time, PEM energy deposition 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 most likely need to update processing code with a patch delivery. At this time, updated HEPS calibration parameters will be submitted. These 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 *********** The following report from WINDII was received on 25 Feb, but it was accidently overlooked when the 25 Feb 2000 Status Report was prepared. WINDII REPORT FOR THE WEEK ENDING February 25, 2000 WINDII is next scheduled to operate March 5-16, 2000. *********** MPG *********** Routine processing of instrument Daily Activity Plans continues with no problems. The instrument operations schedule for the next yaw period (21 March to 25 April 2000) was coordinated and distributed. *********** 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. *2 days ATT (7.3) PROD (2R-2C=0L) *2 days OBC (3.4) PROD (2R-2C=0L) *1 day PEM (3.32) PROD (L1-L2) (1R-1C=0L) *2 days SUS (7.2) PROD (L1-L3) (2R-2C=0L) 18 days WIN (5.11A) PROD (L1-L3) (522R-482C-14F=40L) 2 days SEN (5.0) PROD (1992) (2R-2C=0L) *The CDHF reprocessed ATTITUDE, OBC, PEM, and SUSIM against the LEVEL0 data that was re-ingested with better quality for UARS DAY 3083 and 3084. Data created in the month of December 1999 has been loaded into the DAAC Transfer Tables for HALOE, NMC, UKMO, and PEM. *********** FOT *********** REPORTING PERIOD This report covers 19 February, 2000 (Orbit 46129, GMT Day 050) through 25 February 2000 (Orbit 46233, GMT Day 056). 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 PEM 055/0008 46203 AXIS-1 On The beta angle ranged between the angles of 9.4 degrees to 35.2 degrees for this report period. The beta angle is now increasing toward a maximum angle of 51 degrees on 04 March 1999 (DOY 064). 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 0.7 to 1.0 degrees C. Additional battery performance data for each battery on 18 February 2000 and 25 February 2000 are provided in Appendix D. The clock error ranged from 10.7 to -10.8 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 = 02 % ALERTS = 00 The following real-time command sheets were executed for the listed operational element(s) during this report period (see Appendix A). % FOT = 015 % HALOE = 02 % PEM = 01 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: 7 Transponder A: 00/021 - 2287.496849 7 Transponder B: 00/031 - 2287.498836 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 00/055 show the observatory data loss to be 565 hours, 38 minutes, 19.273 seconds (an increase of 0 minutes 0 seconds since the last report period). 100 percent data capture was observed this past week. OTHER SIGNIFICANT EVENTS UARS SATELLITE OPERATIONS The FOT worked on SCS-21 by providing data for the development of a new trending system for UARS. The FOT has been providing instruction into the details on the capabilities of the current trending utility. The FOT is looking forward to an improvement in this area. A new trending tool could reduce trend time from hours to minutes. In addition, the FOT also provided to the SCS-21 folks, a list and snaps of all display pages. MEETINGS February 24, 2000 (DOY 055) - The FOT went over to the Landsat 5 operations control center to observe their inclination maneuver. That mission is similar to the UARS mission therefore it was interesting to relate the configuration and dynamics of the maneuvers to the UARS spacecraft FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for March 21, 2000 (DOY 081). 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 25 February 2000 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------- 46129 050/0055 00-057 HALOE Power ON 46133 050/0755 00-058 HALOE HTR MTR ON 46140 050/1848 00-059 NBTR NBTR MANAGEMENT 46147 051/0616 00-059 NBTR NBTR MANAGEMENT 46155 051/1817 00-060 NBTR NBTR MANAGEMENT 46161 052/0435 00-060 NBTR NBTR MANAGEMENT 46170 052/1857 00-061 NBTR NBTR MANAGEMENT 46176 053/0439 00-061 NBTR NBTR MANAGEMENT 46191 054/0442 00-062 NBTR NBTR MANAGEMENT 46199 054/1644 00-062 NBTR NBTR MANAGEMENT 46200 054/1905 00-063 NBTR NBTR MANAGEMENT 46203 055/0008 00-064 PEM PEM AXIS 1 ON 46211 055/1313 00-066 OBC Clk Adj fr 0.00 to 20.6 msec/day 46214 055/1647 00-063 NBTR NBTR MANAGEMENT 46215 055/1828 00-065 NBTR NBTR MANAGEMENT 46221 056/0448 00-065 NBTR NBTR NOOPS 46230 056/1911 00-067 NBTR NBTR NOOPS 46233 056/2333 00-068 OBC Clk Adj fr 20.6 to 0.00 msec/day ____________________________________________________________________________________ APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 25 February 2000 The following Out-Of-Limits occurrences were detected: MNEMONIC STATE DESCRIPTION ORBITS --------- ----- ------------ ------ PEAXTHERM6Z Y-HI PEM AXIS THERM 6Z TEMP 46211-18 HRPTSPBIMON Y-HI HRDI PB MONITOR 46211,15-18 The following ALERT occurrences were detected: MNEMONIC DESCRIPTION ORBITS --------- ------------ ------ None to report this period. ____________________________________________________________________________________ APPENDIX C CLOCK & SOLAR ARRAY RATE CORRECTIONS Week ending 25 February 2000 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ---- ----------------- 46211 055/13:13 (24 Feb 00) from 0.00 to 20.6 msec/day 46233 056/23:33 (25 Feb 00) from 20.6 to 0.00 msec/day _________________________________________________________________________________ APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 25 February 2000 18 Feb 2000 - GMT Day 049 Beta = 9.4 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 -67.2/-89.6 -3.68/-4.94 +0.0/+0.0 16.0 0.000 0.0 2 +33.6/-22.4 +5.15/+3.87 +30.4/-13.6 25.1 1.030 20.2 3 +134.4/11.2 +3.87/+2.60 +29.6/-15.2 25.0 1.027 19.6 25 Feb 2000 - GMT Day 056 Beta = 35.2 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 -56.0/-89.6 -3.05/-4.31 +0.0/+0.0 16.0 0.000 0.0 2 +89.6/-5.6 +5.79/+4.83 +29.2/-15.2 25.1 1.028 22.5 3 +89.6/+0.0 +5.15/+3.87 +28.8/-16.4 25.1 1.026 22.2 V/T LEVEL CHANGES ORB# TIME LVL FR-TO ----- ---------- ---------- no changes V/T 5 ____________________________________________________________________________________ APPENDIX E UARS ANOMALY REPORTS Week ending 25 February 2000 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 00-004 FOT 46142 050/2136 14170 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- No new reports generated ANOMALY INVESTIGATION REPORTS GENERATED AR NO. SUBSYS ORBIT TIME TTR PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- No new reports generated 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 PB 00-004 FOT see list Feb 00 14170 Generic Late Acq. SEVNTFW00/08