******************************************************************** UARS WEEKLY STATUS REPORT - 3 Jan 2003 ******************************************************************** *********** SOLSTICE *********** Nothing received. *********** SUSIM *********** SUSIM successfully gathered all of its daily 1.1 nm (mid) resolution and MgII solar scans this past week during periods of predicted UARS telemetry. *********** ACRIM *********** Nothing received. *********** PEM *********** Nothing received. *********** 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 December 2002 (Orbit 61676, GMT Day 355) through 27 December 2002 (Orbit 61781, GMT Day 361). 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 HALOE 356/1311 61684 POWER ON HALOE 356/1742 61702 POWER OFF HALOE 356/1742 61702 POWER ON PEM 356/1819 61703 POWER ON - DAY ONLY WINDII 358/1308 61729 POWER ON PEM 361/1302 61774 POWER ON AXIS The beta angle ranged between the angles of 06.4 degrees to 38.4 degrees for this report period. The beta angle is now increasing towards a maximum angle of 79 degrees on 08 January 2003 (DOY 008). 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 0.63 to 0.96 degrees C. Additional battery performance data for each battery on 20 December and 27 December 2002 are provided in Appendix D. The clock error ranged from -10.3 to 03.2 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 = 02 PEM = 02 WINDII = 01 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 00 Two (2) Anomaly Report remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION Zero (0) 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 FOT would like to extend its best wishes to everyone for a Happy Holiday Season and a Happy New Year. Thanks to everyone involved in making this past year another successful one for UARS. MEETINGS -None this report period. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 27 January 2003 (DOY 027). 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 27 December 2002 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 61684 355/1232 02-498 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 61699 356/1311 02-499 HALOE POWER ON 61700 356/1408 02-499 HALOE HEATER BUS OFF 61702 356/1742 02-501 HALOE POWER OFF 61702 356/1742 02-499 HALOE POWER ON 61703 356/1819 02-502 PEM POWER ON - DAY ONLY 61729 358/1308 02-503 WINDII POWER ON 61774 361/1302 02-504 PEM POWER ON AXIS 14W 61779 361/2010 02-505 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 27 December 2002 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 December 2002 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 61699 356/1257 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 61779 361/2014 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 27 December 2002 20 December 2002 - GMT Day 354 Beta = 05.2 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 -156.8/-179.2 -3.68/-4.94 +00.0/+00.0 08.3 0.000 0.0 2 +16.8/-33.6 +5.14/+4.50 +29.6/-13.6 25.0 1.030 19.7 3 +28.0/-33.6 +3.87/+2.91 +28.4/-13.6 25.0 1.020 19.2 27 December 2002 - GMT Day 361 Beta = 38.4 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 -156.8/-179.2 -3.68/-4.31 +00.0/+00.0 08.3 0.000 0.0 2 +16.8/-72.8 +5.46/+4.50 +28.0/-15.6 25.1 1.010 21.5 3 +22.4/-44.8 +4.50/+3.87 +27.2/-15.6 25.1 1.010 21.0 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- -None this report period. APPENDIX E UARS ANOMALY REPORTS Week ending 27 December 2002 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- -None this report period. ANOMALY CLOSURE INFORMATION RECEIVED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 02-061 FOT 61512 344/0124 31907 33 Second Data 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 ------ ------ ----- ---- --- ----------------- 02-058 FOT 61113 317/1341 N/A NEG ACQ / UFLTR ERROR 02-060 FOT 61421 338/0057 N/A PSU Cmd Clock Timeout