******************************************************************** UARS WEEKLY STATUS REPORT - 31 Oct 2003 ******************************************************************** *********** SOLSTICE *********** SOLSTICE continues to perform nominally, taking solar data on all available orbital tracking periods. This week we received about 53% of each day's data amounting to nearly 640 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. *********** CDHF *********** Nothing received. *********** FOT *********** REPORTING PERIOD This report covers 18 October 2003 (Orbit 66202, GMT Day 291) through 24 October 2003 (Orbit 66306, GMT Day 297). 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 AXIS 292/1230 66225 POWER ON AXIS 2 The beta angle ranged between the angles of 60.7 degrees to 67.3 degrees for this report period. The beta angle is now decreasing towards a minimum angle of 0 degrees on 11 November 2003 (DOY 315). 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 1.58 degrees C. Additional battery performance data for each battery on 17 October and 24 October 2003 are provided in Appendix D. The clock error ranged from -10.5 to 09.8 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 = 00 SOLSTICE = 00 PEM = 01 HALOE = 00 HRDI = 00 UARS Anomaly Reports initiated during this report period are listed in Appendix E and summarized below. FOT = 01 One (1) Anomaly Report remained OPEN at the end of this report period (see Appendix E). GROUND SYSTEM OPERATION One (1) operational support problem 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 Testing of the new 3 TDRS functionality on both the Eclipse and CMS continued this week. Raytheon provided a preliminary build, which was installed on the prototype on 22 October 2003. So far only two minor problems have been found but will be fixed in the official build delivery next week. A few tests still need to be completed next week in order to verify all functionality is working as planned. A problem was also found with the new CMS code, in regards to how the three TDRS ephemeris load is built. Software development is analyzing the problem and will hopefully find a fix quickly. In parallel, the FOT is also working with the FSW group to review and test the new flight software uplink procedure. Testing has gone well so far and should be completed by the second week in November so that the end-to-end testing can begin. MEETINGS -None this report period 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 24 October 2003 ORBIT AOS NO. SUBSYS REASON ----- --- --- ------ ------ 66203 291/0220 03-277 OBC/CLK CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 66225 292/1230 03-278 AXIS POWER ON AXIS 2 66261 294/2239 03-279 OBC/CLK CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 66288 296/1834 03-280 OBC/CLK CLK ADJ FR 41.2 TO 20.6 MSEC/DAY APPENDIX B OUT-OF-LIMITS & ALERTS OCCURRENCES Week ending 24 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 24 October 2003 CLOCK DRIFT RATE ADJUSTMENTS ORBIT TIME CLOCK RATE CHANGE ----- ----- ----------------- 66203 291/0220 CLK ADJ FR 0.0 TO 20.6 MSEC/DAY 66261 294/2239 CLK ADJ FR 20.6 TO 41.2 MSEC/DAY 66288 296/1834 CLK ADJ FR 41.2 TO 20.6 MSEC/DAY APPENDIX D UARS BATTERY PERFORMANCE DATA Week ending 24 October 2003 17 October 2003 - GMT Day 290 Beta = 57.4 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/-22.4 +4.51/+2.60 +22.4/-14.4 26.4 1.030 17.1 3 +16.8/-22.4 +3.23/+1.97 +22.0/-14.4 26.4 1.020 16.7 24 October 2003 - GMT Day 297 Beta = 67.3 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 -2.74/-4.31 +00.0/+00.0 07.2 0.000 0.0 2 +11.2/-22.4 +3.55/+1.97 +19.2/-15.2 26.7 1.050 15.7 3 +11.2/-33.6 +2.60/+1.34 +18.8/-14.8 26.7 1.050 15.4 V/T LEVEL CHANGES ORB# AOS TIME LVL FR-TO ----- -------- --------- None this report period APPENDIX E UARS ANOMALY REPORTS Week ending 24 October 2003 NEW ANOMALY REPORTS GENERATED AR NO. SUBSYS ORBIT TIME CDS PROBLEM/DATA LOSS ------ ------ ----- ---- --- ----------------- 03-050 FOT 66301 297/1406 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 ------ ------ ----- ---- --- ----------------- 03-050 FOT See List Oct 03 30832 Generic Late Acquisition