******************************************************************** UARS WEEKLY STATUS REPORT - 16 JAN 2004 ******************************************************************** *********** SOLSTICE *********** During this week SOLSTICE continued to operate in good health gathering solar data on all available orbital tracking periods. On average, we received 57% of each day's data amounting to about 539 minutes of solar observing time per day. *********** SUSIM *********** SUSIM successfully gathered all of its daily mid (1.1 nm) resolution, Mg II, and high resolution monitoring scans during this past week for periods of UARS real-time telemetry or onboard tape recording. *********** PEM *********** Level 2 PEM HEPSA data files are being reprocessed for submission to the DAAC. This data has been designated as version 2; however, there is no format difference from the version 1 data format. Version 2 HEPSA data is being generated because it was discovered that there exists processing errors within some of the HEPSA version 1 data files. Thus, if you are using any HEPSA version 1 data files from the DAAC, please replace them with the version 2 data files. Currently, HEPSA data between 1991274 and 2003149 has been reprocessed and archived at the GSFC DAAC. Level 2 PEM MEPS data file documentation is complete and submitted to the DAAC. MEPS data files are version 1. Processed MEPS data files at the DAAC archive are between 1991274 and 1992399. MEPS data files between 1992340 and 1992349 are waiting for DAAC collection. PEM continues to receive NMC data files from NOAA. No problems have been encountered. NOAA has changed the binary structure of the NMC data and PEM is now receiving two data streams, one in the original VAX format and the other from their new binary format. The PEM data from the GUVI conjunction periods may be found at http://wwwpem.space.swri.edu/guvi-pem.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. *********** WINDII *********** 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 27 December 2003 (Orbit 67255, GMT Day 361) through 02 January 2004 (Orbit 67359, GMT Day 002). 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 NONE THIS REPORT PERIOD The beta angle ranged between the angles of 65.1 degrees to 79.0 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 0 degrees on 20 January 2004 (DOY 020). 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 0.31 to 0.63 degrees C. Additional battery performance data for each battery on 26 December and 02 January 2004 are provided in Appendix D. The clock error ranged from 17.5 to -09.4 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). PEM = 01 FOT = 07 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 04 Four (4) Anomaly Reports remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION No 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 Another DSN test with the spacecraft was performed on 30 December 2003. During this test, data was received at the POCC from the spacecraft via JPL. The UARS TAC showed lock on the data, but unfortunately no data was decommed on the Eclipse system. This means that either the problem lies in the TAC desktop configuration or in the Eclipse. Analysis will be done next week to determine where the problem lies. The FOT continued to investigate the large attitude errors seen on the simulator during each run of the day-in-the-life (DITL). The power issues that caused the attitude to diverge were corrected but subsequent runs still showed the spacecraft (on the simulator) lose control. More analysis is needed to determine the reason behind the large errors. This problem needs to be resolved so that the DITL testing can continue. MEETINGS The FOT met with the UARS NOPE and test team at JPL on 29 December 2003 to discuss the subsequent day's test. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 20 January 2004 (DOY 020). 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 02 January 2004 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 67265 361/1737 03-337 OBC/CLK CLK ADJ FR 20.6 TO 0.0 MSEC/DAY 67265 361/1737 03-338 PEM ZEPS/NEPS TO DAY-ONLY 67267 361/2003 03-339 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 67268 361/2142 03-340 OBC/CLK CLK ADJ FR -20.6 TO 41.2 MSEC/DAY 67311 364/1814 03-341 CADH CONFIG TRANSMITTER-2 FOR DSN OMNI 67311 364/1911 03-342 CADH CONFIG TRANSMITTER-2 FOR TDRS OMNI 67311 364/1911 03-343 OBC/CLK CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 67338 001/1254 04-001 OBC/CLK CLK ADJ FR 20.6 TO 41.2 MSEC/DAY APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 02 January 2004 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 January 2004 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 67265 361/1741 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY 67267 361/2010 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 67268 361/2207 CLK ADJ FR -20.6 TO 41.2 MSEC/DAY 67311 364/1911 CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 67338 001/1256 CLK ADJ FR 20.6 TO 41.2 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 02 January 2004 26 December 2003 - GMT Day 360 Beta = 63.4 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 -700.0/-700.0 -3.67/-4.62 +00.0/+00.0 07.2 0.00 0.0 2 +11.2/-22.4 +3.87/+2.91 +20.4/-15.2 26.4 1.02 17.5 3 +11.2/-33.6 +2.91/+1.97 +20.0/-14.8 26.4 1.01 17.0 02 January 2004 - GMT Day 002 Beta = 79.0 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 -700.0/-700.0 -1.80/-3.05 +00.0/+00.0 07.2 0.00 0.0 2 +22.4/-22.4 +2.28/+1.65 +12.8/-14.0 27.7 1.07 11.5 3 +33.6/-78.4 +1.65/+1.34 +12.8/-13.6 27.5 1.07 11.0 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period APPENDIX E UARS ANOMALY REPORTS Week ending 02 January 2004 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-060 FOT 67255 361/0101 N/A CONFIGS LOCKED UP 03-055 FOT 67272 362/0433 30832 Generic Late Acquisition 03-055 FOT 67278 362/1412 30832 Generic Late Acquisition 04-001 FOT 67343 001/2126 30832 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-056 FOT 66992 343/1259 34488 Data Drops 03-057 ATC 67044 347/0100 N/A S/W Stored Cmd Error 03-058 HRDI 67059 348/0101 N/A Not accepting loads 03-059 FOT 67098 350/1515 34541 TDRSS East MA Problem 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 ------ ------ ----- ---- --- ----------------- 03-055 FOT See List Dec 03 30832 Generic Late Acquisition 03-060 FOT 67255 361/0101 N/A CONFIGS LOCKED UP