******************************************************************** UARS WEEKLY STATUS REPORT - 17 Oct 2003 ******************************************************************** *********** SOLSTICE *********** SOLSTICE continues to perform nominally, taking solar data on all available orbital tracking periods. This week we received about 58% of each day's data amounting to about 520 minutes of solar observing time per day. *********** SUSIM *********** SUSIM successfully gathered all of its daily mid (1.1 nm) resolution, weekly offset, and O2 occultation scans during periods of UARS telemetry or periods of onboard tape recording. *********** 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. The MPG participated in the 3-TDRSS status meeting held on 16 October. *********** CDHF *********** Nothing received. *********** FOT *********** REPORTING PERIOD This report covers 04 October 2003 (Orbit 65992, GMT Day 277) through 10 October 2003 (Orbit 66096, GMT Day 283). 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 SUSIM 278/1404 66015 POWER ON SOLSTICE 278/2246 66020 DAY ONLY TO FULLTIME OPS PEM 279/1306 66029 ZEPS & NEPS TO DAY ONLY HALOE 280/1303 66044 POWER ON HRDI 283/0158 66083 DAY ONLY TO FULLTIME HRDI 283/1909 66093 PROCESSOR REBOOT The beta angle ranged between the angles of 03.1 degrees to 29.3 degrees for this report period. The beta angle is now increasing towards a maximum angle of 68 degrees on 22 October 2003 (DOY 295). 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 1.59 to 1.60 degrees C. Additional battery performance data for each battery on 03 October and 10 October 2003 are provided in Appendix D. The clock error ranged from -09.6 to 10.0 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 = 03 SUSIM = 01 SOLSTICE = 01 PEM = 02 HALOE = 02 HRDI = 02 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 02 Two (2) 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 The FOT continues to move forward with the 3 TDRS implementation. The new database has been recompiled and moved onto the UARS Command Management System. The FOT has also received the official release of the new CMS software and has commenced testing. In parallel, the FOT has also initiated working with the FSW group to review and test the new flight software uplink procedure. MEETINGS The FOT attended the UARS Monthly Status review on 07 October 2003. FUTURE SIGNIFICANT EVENTS The next UARS Yaw slew is scheduled for 11 November 2003 (DOY 315). 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 10 October 2003 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 65999 277/1228 03-264 OBC/CLK CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 66015 278/1404 03-265 SUSIM POWER ON 66016 278/1548 03-262 PSU FROM VT6 TO VT5 66017 278/1737 03-266 OBC/CLK CLK ADJ FR -20.6 TO 0.0 MSEC/DAY 66018 278/1814 03-262 MPS BATSOC 66020 278/2246 03-267 SOLSTICE DAY-ONLY TO FULLTIME OPS 66029 279/1221 03-265 SUSIM POWER ON COMPLETED 66029 279/1306 03-268 PEM ZEPS & NEPS TO DAY ONLY 66044 280/1303 03-269 HALOE POWER ON; PART 1 66048 280/1918 03-270 HALOE POWER ON; PART 2 66059 281/1301 03-271 PEM AXIS 1 TURN ON (7 WATTS) 66083 283/0158 03-272 HRDI DAY ONLY TO FULLTIME 66093 283/1909 03-273 HRDI PROCESSOR REBOOT APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 10 October 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 10 October 2003 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 65999 277/1228 CLK ADJ FR 0.0 TO -20.6 MSEC/DAY 66017 278/1740 CLK ADJ FR -20.6 TO 0.0 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 10 October 2003 03 October 2003 - GMT Day 276 Beta = 03.4 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 -700.0/-700.0 -3.05/-4.62 +00.0/+00.0 07.2 0.000 0.0 2 +11.2/-33.6 +5.47/+4.51 +28.0/-13.6 26.2 1.020 20.0 3 +16.8/-33.6 +4.51/+2.92 +26.8/-13.6 26.2 1.020 19.5 10 October 2003 - GMT Day 283 Beta = 29.3 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/-4.62 +00.0/-50.0 07.2 0.000 0.0 2 +16.8/-67.2 +6.11/+4.51 +28.4/-50.0 25.4 1.030 20.5 3 +22.4/-50.4 +4.83/+3.23 +27.2/-50.0 25.3 1.030 20.0 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- 66016 278/1548 LV6 -> LV5 APPENDIX E UARS ANOMALY REPORTS Week ending 10 October 2003 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-050 FOT 66086 283/0749 30832 Generic Late Acquisition 03-051 HRDI 66083 283/0158 NA HRDI Not Accepting Microloads 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 ------ ------ ----- ---- --- ----------------- 03-050 FOT See List Oct 03 30832 Generic Late Acquisition 03-051 HRDI 66083 283/0158 NA HRDI Not Accepting Microloads