******************************************************************** UARS WEEKLY STATUS REPORT - 13 JUN 2003 ******************************************************************** *********** SOLSTICE *********** SOLSTICE continues to perform nominally, taking solar data on all available orbital tracking periods. *********** SUSIM *********** Nothing received. *********** ACRIM *********** Nothing received. *********** PEM *********** The PEM web site has moved. It has a new URL. Access the PEM web site using http://wwwpem.space.swri.edu. The PEM data from the GUVI conjunction periods has moved to http://wwwpem.space.swri.edu/guvi-pem.html. 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 2001365 has been reprocessed and archived at the GSFC DAAC. HEPSA data files for 2002001 through 2002009 are awaiting archiving at the GSFC DAAC. PEM continues to work with the GUVI team on the diagnosis of data from the first conjunction period. Analysis of the two conjunction passes showed that the aurora as detected by GUVI was at higher latitude than UARS. GUVI images from other times from the first conjunction period show spatial regions that both GUVI and PEM sampled when aurora was present. Separation is several minutes to 10's of minutes when both instruments saw aurora. PEM has seen no aurora during the second conjunction period. Due to a spacecraft anomaly, no PEM data was collected during the third conjunction period. 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. *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 31 May 2003 (Orbit 64097, GMT Day 151) through 06 June 2003 (Orbit 64201, GMT Day 157). 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 35.0 degrees to 28.3 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 0 degrees on 14 June 2003 (DOY 165). 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 0.96 to 1.28 degrees C. Additional battery performance data for each battery on 30 May and 06 June 2003 are provided in Appendix D. The clock error ranged from -8.0 to 1.6 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 = 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 = 00 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 03 One (1) Anomaly Report remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION Three (3) 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 The new build of Eclipse software (Build 2.0.2) was delivered to the prototype system on 29 May 2003. FOT testing of this build began on 30 May 2003 and will continue through next week. Once testing has been completed some parallel operations will be run before the build is released for operations. MEETINGS The FOT attended the UARS Monthly Status Review on 03 June 2003, to review the activities and events for the month of May. The FOT also attended the weekly UARS DRB on 03 June 2003, to review the open DRs and discuss the details of the next Eclipse software delivery. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 14 June 2003 (DOY 165). 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 06 June 2003 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ -None this report period. APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 06 June 2003 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 06 June 2003 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- -None this report period. APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 06 June 2003 30 May 2003 - GMT Day 150 Beta = 34.9 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 -3.05/-4.31 +00.0/+00.0 07.2 0.000 0.0 2 +11.2/-106.4 +5.15/+4.51 +26.8/-14.4 25.4 1.020 19.8 3 +22.4/-33.6 +4.51/+3.23 +26.4/-14.0 25.4 1.020 19.6 06 June 2003 - GMT Day 157 Beta = 28.3 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 -3.05/-4.31 +00.0/+00.0 07.2 0.000 0.0 2 +00.0/-179.2 +5.47/+4.51 +27.2/-14.8 24.5 1.030 20.5 3 +16.8/-67.2 +4.51/+3.23 +26.4/-14.4 24.3 1.020 20.3 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 06 June 2003 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-018 FOT 64102 151/0923 30832 Generic Late Acquisition 03-027 FOT 64125 152/2116 30832 Generic Late Acquisition 03-027 FOT 64140 153/2112 30832 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-018 FOT See List May 03 30832 Generic Late Acquisition 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 ------ ------ ----- ---- --- ----------------- 03-027 FOT See List June 03 30832 Generic Late Acquisition