******************************************************************** UARS WEEKLY STATUS REPORT - 18 FEB 2005 ******************************************************************** *********** SOLSTICE *********** SOLSTICE has been under daylight only operations for four days this week. Normal operations resumed Monday (doy 45). The instrument continues to perform well, making the standard set of solar observations daily. *********** SUSIM *********** SUSIM was turned off on Feb. 11 for the UARS yaw-around and resumed operations on Feb. 14. Since then, the experiment successfully gathered daily mid (1.1 nm) resolution, MgII, occultation, solar pointing offset, and continuous monitoring scans for time periods with UARS telemetry or tape recording. *********** PEM *********** HEPSA data files are version 2. Currently, HEPSA data between 1991274 and 2004279 has been reprocessed and archived at the GSFC DAAC. HEPSA data between 2004280 and 2004289 are currently waiting archival at GSFC DAAC. HEPSA data between 2004290 and 2004299 are currently being processed. MEPS data files are version 1. Processed MEPS data files at the DAAC archive are between 1991274 and 2004279. MEPS data between 2004280 and 2004299 are currently waiting archival at GSFC DAAC. PEM continues to receive NMC data files from NOAA. NMC host machine changed during mid-January which caused some NMC data transfer failures; however, this situation was corrected and recovery completed with the assistance of Roger Lin at NOAA. No problems have been encountered since updates have occurred. 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 October 29 of 1991, November 8-9 of 1991, April 6-7 of 2000, March 31 - April 1 of 2001, April 11-12 of 2001, November 6-7 of 2001, and November 11-12 of 2001. PEM has received a request for data from the super storm of November 2004. The Dst value showed sudden commencement early on November 7, 2004 reaching a Dst value of about -380 gamma early on November 8, 2004. PEM was not active at that time and became active late on November 8, 2004 in day only mode. A second peak of about -280 gamma was observed on November 11, 2004. *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 05 February 2005 (Orbit 73361, GMT Day 036) through 11 February 2005 (Orbit 73466, GMT Day 042). 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 038/2319 73406 POWER OFF (YAW) PEM 040/2314 73436 ZEPS/NEPS POWER OFF SUSIM 041/2201 73450 POWER OFF SOLSTICE 041/2312 73451 FULLTIME TO DAY ONLY The beta angle ranged between the angles of 21.5 degrees to 05.7 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 1.0 degrees on 12 February 2005 (DOY 043). 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 0.64 to 0.66 degrees C. Additional battery performance data for each battery on 04 February 2005 and 11 February 2005 are provided in Appendix D. The clock error ranged from 10.4 to -10.1 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 = 02 HALOE = 01 PEM = 01 SUSIM = 01 SOLSTICE = 01 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 06 Four (4) Anomaly Reports 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 This week the batteries have performed nominally and the MPS continues to utilize the VT-7 charge rate. The FOT has completed their CMS software acceptance testing. The next step in the process is for the official release of the software to be installed on the backup CMS. This will be done by the software development team next week. Once that is accomplished, the FOT will run a few simulated days of operations to confirm the install. If all goes well, then the new release will be put onto the operational CMS. MEETINGS The FOT called a kickoff meeting on 07 February 2005 to start planning the activities needed to reset the flight software epoch year onboard. This will be done to prevent a clock rollover, which is scheduled to occur on 16 September 2005. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 12 February 2005 (DOY 043). 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 11 February 2005 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 73406 038/2319 05-036 HALOE POWER OFF (YAW) 73422 040/0100 05-037 OBC CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 73436 040/2314 05-038 PEM ZEPS/NEPS POWER OFF 73441 041/0738 05-039 OBC CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 73450 041/2201 05-040 SUSIM POWER OFF 73451 041/2312 05-041 SOLSTICE FULLTIME TO DAY ONLY APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 11 February 2005 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 11 February 2005 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 73422 040/0102 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 73441 041/0739 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 11 February 2005 04 February 2005 - GMT Day 035 Beta = 28.1 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 -1.48/-2.42 +00.0/+00.0 07.0 0.00 0.0 2 -5.6/ -67.2 +10.06/+9.06 +28.4/-15.2 26.7 1.07 20.9 3 22.4/ -72.8 +7.74/+7.09 +26.8/-14.4 26.7 1.05 20.1 11 February 2005 - GMT Day 042 Beta = 05.7 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/-3.68 +00.0/+00.0 07.0 0.00 0.0 2 67.2/ 11.2 +8.40/+7.74 +28.0/-12.8 27.0 1.06 18.8 3 -33.6/-112.0 +5.79/+5.15 +25.6/-12.0 26.9 1.04 17.8 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 11 February 2005 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 05-005 FOT 73380 037/0655 30832 Generic Late Acquisition 05-005 FOT 73388 037/1919 30832 Generic Late Acquisition 05-005 FOT 73413 039/1117 30832 Generic Late Acquisition 05-008 FOT 73431 040/1517 38482 IP NOC Router Problem (:37) 05-005 FOT 73431 040/1517 30832 Generic Late Acquisition (:42) 05-009 FOT 73448 041/1836 N/A Mutual Interference ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 05-006 WSGT 73303 032/0336 38406 WS not sending UPDs for multip 05-007 FOT 73344 034/2039 N/A SUSIM RESET 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 ------ ------ ----- ---- --- ----------------- 05-005 FOT See List Feb 05 30832 Generic Late Acquisition 05-002 MPS 73008 012/1251 N/A BATT 3 Diff Voltage High 05-008 FOT 73431 040/1517 38482 IP NOC Router Problem (:37) 05-009 FOT 73448 041/1836 N/A Mutual Interference