******************************************************************** UARS WEEKLY STATUS REPORT - 04 July 2003 ******************************************************************** *********** SOLSTICE *********** Nothing received. *********** SUSIM *********** SUSIM successfully gathered all of its daily mid resolution, weekly offset, and O2 occultation scans this past week during periods of UARS telemetry or periods of onboard tape recording. SUSIM will perform a major, "yearly" (4 lamp) calibration next week (July 7 through July 11). We also plan to change in the last, fresh, MgF2 filter to improve the signal to noise characteristics in the daily scans of the short wavelength (FUV) portion of the spectrum. This should improve our Traceability Mission comparisons with TIMED/SEE and SORCE SOLSTICE, especially for the high (0.15 nm) resolution scans. *********** 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 2002029 has been reprocessed and archived at the GSFC DAAC. HEPSA data files for 2002030 through 2002079 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 21 June 2003 (Orbit 64412, GMT Day 172) through 27 June 2003 (Orbit 64517, GMT Day 178). 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 WINDII 173/1655 64438 POWER ON WINDII 173/1806 64439 POWER OFF PEM 176/1425 64499 POWER ON AXIS 1 & 2 The beta angle ranged between the angles of 24.5 degrees to 52.3 degrees for this report period. The beta angle is now increasing towards a maximum angle of 80 degrees on 06 July 2003 (DOY 187). 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 20 June and 27 June 2003 are provided in Appendix D. The clock error ranged from -7.0 to 10.7 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 = 01 WINDII = 02 PEM = 01 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 02 One (1) Anomaly Report remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION Two (2) 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 release of the Eclipse software (Build 2.0.2) was installed on the operational servers on 26 June 2003. No problems have been encountered since switching to the new release this week. MEETINGS The FOT attended the weekly UARS DRB on 24 June 2003, to review the open DRs and discuss the installation plan for the new Eclipse software delivery. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 26 July 2003 (DOY 207). 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 27 June 2003 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 64438 173/1655 03-154 WINDII POWER ON 64439 173/1806 03-155 WINDII POWER OFF 64481 176/1425 03-156 PEM POWER ON AXIS 1 & 2 64499 177/1756 03-157 OBC/CLK CLK ADJ FR 20.6 TO 0.0 MSEC/DAY APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 27 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 27 June 2003 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 64499 177/1756 CLK ADJ FR 20.6 TO 0.0 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 27 June 2003 20 June 2003 - GMT Day 171 Beta = 20.6 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 -700.0/-700.0 -3.68/-4.94 +00.0/-00.0 07.2 0.000 0.0 2 +11.2/-39.2 +5.15/+3.23 +28.0/-14.8 24.8 1.020 18.9 3 +22.4/-44.8 +3.87/+2.60 +27.2/-14.4 24.8 1.010 18.6 27 June 2003 - GMT Day 178 Beta = 52.3 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 -3.68/-4.94 +00.0/-00.0 07.2 0.000 0.0 2 +00.0/-89.6 +4.50/+3.23 +24.0/-14.0 25.6 1.020 19.1 3 +22.4/-22.4 +3.55/+2.28 +23.2/-13.6 25.6 1.020 18.8 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 27 June 2003 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-027 FOT 64439 173/1806 30832 Generic Late Acquisition 03-027 FOT 64439 178/2155 30832 Generic Late Acquisition ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- -None this report period. 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