******************************************************************** UARS WEEKLY STATUS REPORT - 2 July 2004 ******************************************************************** *********** SOLSTICE *********** Nothing received. *********** SUSIM *********** SUSIM successfully gathered its daily mid (1.1 nm) resolution, MgII, occultation, solar pointing offset, and continuous monitoring scans 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 2003365 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 2002079. MEPS data files between 2002080 and 2002119 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. The additional electron data for the October and November storms of 2003 has been moved and is now located at http://climatology.space.swri.edu/uars_fromRudy.html. For those users of SDDAS, update your UARS Meta data and these data times will appear with full functionality. Proton data from these storms are now located at http://climatology.space.swri.edu/UARS_images_from_Rudy_(Apr._2004).html Requests have been received for storm spectral data. Overview plots were produced and these plots may be found on the web at http://climatology.space.swri.edu/UARS_images_postedJune2004.html for the storms of April 6-7 of 2000, March 31 - April 1 of 2001, April 11-12 of 2001, and November 6-7 of 2001. *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. *********** 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 19 June 2004 (Orbit 69886, GMT Day 171) through 25 June 2004 (Orbit 69991, GMT Day 177). 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 171/2259 69901 POWER OFF PEM/AXIS 174/2250 69946 POWER OFF PEM 177/1221 69984 POWER OFF (S/C LOW PWR) The beta angle ranged between the angles of 52.0 degrees to 76.3 degrees for this report period. The beta angle is now increasing towards a maximum angle of 80 degrees on 27 June 2004 (DOY 180). 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 1.26 to 1.27 degrees C. Additional battery performance data for each battery on 18 June and 25 June 2004 are provided in Appendix D. The clock error ranged from 11.5 to -12.6 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 = 05 HALOE = 01 SUSIM = 02 PEM = 02 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 04 One (1) Anomaly Report remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION Four (4) 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 This week UARS is flying through its high beta period. The power margin during this period is always very difficult to estimate. The FOT will be closely monitoring power and adjusting instrument status throughout this period if needed. Instrument teams will be informed if the status of their instrument is changed. This week the FOT received the new Eclipse software build. It has been installed on the prototype machine and testing will begin next week. There were several DR fixes incorporated in this build, so testing will take a few weeks before this build will be ready for operations. MEETINGS The FOT attended the biweekly meeting with the HRDI team to discuss the attitude error seen in their data. FDF and Joe Hashmall continue to perform independent analysis to try to isolate the source of this problem. Their focus for the next few weeks will be the TAM residuals and digitization affects and the UFLTR tuning. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 17 July 2004 (DOY 199). This maneuver will be a Forward to Reverse Flight maneuver (Northern 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 25 June 2004 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 69898 171/1857 04-172 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 69901 171/2259 04-173 HALOE POWER OFF 69911 172/1459 04-174 SUSIM EXCEPTION CLEAR 69925 173/1413 04-175 SUSIM AZIMUTH COMMANDS 69931 173/2254 04-176 OBC/CLK CLK ADJ FR 20.6 TO 0.0 MSEC/DAY 69946 174/2250 04-177 PEM/AXIS POWER OFF 69950 175/0503 04-178 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 69951 175/0744 04-179 OBC/CLK CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 69980 177/0459 04-180 OBC/CLK CLK ADJ FR 41.2 TO 20.6 MSEC/DAY 69984 177/1221 04-181 PEM POWER OFF (S/C LOW PWR) APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 25 June 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 25 June 2004 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 69898 171/1857 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 69931 173/2305 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY 69950 175/0503 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 69951 175/0748 CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 69980 177/0459 CLK ADJ FR 41.2 TO 20.6 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 25 June 2004 18 June 2004 - GMT Day 170 Beta = 46.8 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 -700.0/-700.0 -3.68/-4.94 +00.0/+00.0 07.0 0.00 0.0 2 +11.2/-179.2 +4.83/+3.87 +25.2/-14.4 25.4 1.03 22.0 3 +16.8/-112.0 +3.87/+2.60 +24.8/-14.4 25.4 1.02 21.0 25 June 2004 - GMT Day 177 Beta = 76.3 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 -700.0/-700.0 -2.42/-3.05 +00.0/+00.0 07.0 0.00 0.0 2 +05.6/-156.8 +2.60/+1.34 +14.4/-14.4 24.3 1.01 12.6 3 +11.2/-089.6 +1.97/+0.71 +14.4/-14.4 24.3 1.00 12.6 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 25 June 2004 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 04-032 FOT 69952 175/0927 30832 Generic Late Acquisition 04-032 FOT 69981 177/0747 30832 Generic Late Acquisition 04-032 FOT 69988 177/1759 30832 Generic Late Acquisition 04-032 FOT 69989 177/1949 30832 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 04-033 FOT 69861 169/0702 36148 43 Second Telemetry Dropout 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 ------ ------ ----- ---- --- ----------------- 04-032 FOT See List June 04 30832 Generic Late Acquisition