UARS Weekly Status Report

17 December 2004




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                UARS WEEKLY STATUS REPORT - 17 Dec 2004

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***********
SOLSTICE
***********

Nothing received.

***********
SUSIM
***********

Nothing received.

***********
PEM
***********

Nothing received.

***********
HALOE 
***********

Nothing received.

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MLS
***********

Nothing received.

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HRDI
***********

Nothing received.

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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.

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CDHF
***********

Nothing received.
                  
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FOT
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                           REPORTING PERIOD

This report covers 04 December 2004 (Orbit 72414, GMT Day 339) through
10 December 2004 (Orbit 72518, GMT Day 345).


                         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
       SOLSTICE      340/1256      72436     DAY TO FULL TIME
       SUSIM         340/1520      72438     POWER ON
       PEM           341/1253      72451     POWER ON
       HALOE         342/1250      72466     POWER ON


The beta angle ranged between the angles of 03.9 degrees to 30.4
degrees for this report period.  The beta angle is now increasing
towards a maximum angle of 80 degrees on 23 December 2004 (DOY 358).

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 0.97 degrees C.  Additional
battery performance data for each battery on 03 December and 10
December 2004 are provided in Appendix D.

The clock error ranged from 10.8 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
    SOLSTICE  =    01
    SUSIM     =    01
    PEM       =    01
    HALOE     =    02


UARS Anomaly Reports initiated during this report period are listed in
Appendix E and summarized below.

    FOT       =    00


Zero (0) Anomaly Reports 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


This week the file transfer issue between UPS and CMS was resolved.
After checking the FORMAT machine in TRMM and FDF it was found that no
USM products go through either machine.  That lead the investigation
into the UPS software.  UPS software developers were called in and
during their testing with the FOT found that the software required a
confirmed event in order for the USM to be transferred correctly to
the CMS.  Therefore, all future testing will require confirmed events
for CMS to handle them properly.  With this obstacle out of the way,
the FOT can now continue their CMS software acceptance testing.



                               MEETINGS


The FOT attended the UARS Monthly Status review on 07 December 2004 to
report the significant events from the month of November.  The FOT was
given the action to write up a report describing the work done on
getting the SMA functionality implemented.  That report was written
and sent out on 10 December 2004.

The FOT also attended the biweekly meeting with the HRDI PI team to
discuss the attitude error found in their data.  This week the HRDI
team will continue to review the sample data given to them by FDF and
the simulations will continue on the UTTS.



                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 12 January 2005 (DOY 012).
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 December 2004

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
72436   340/1256   04-337   SOLSTICE    DAY TO FULL TIME
72438   340/1520   04-338   SUSIM       POWER ON-PT1
72451   341/1253   04-339   PEM         POWER ON
72451   341/1253   04-338   SUSIM       POWER ON-PT2
72464   342/0850   04-340   OBC/CLK     CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
72466   342/1250   04-341   HALOE       POWER ON PT 1
72469   342/1729   04-342   HALOE       POWER ON PT 2
72482   343/1331   04-343   OBC/CLK     CLK ADJ FR -20.6 TO 0.0 MSEC/DAY



                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                     Week ending 10 December 2004

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 December 2004

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
72464          342/0858               CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
72482          343/1331               CLK ADJ FR -20.6 TO 0.0 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                     Week ending 10 December 2004

     03 December 2004 - GMT Day 338 Beta = 03.7 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 -3.05/-4.31  +00.0/+00.0  07.0     0.00      0.0
2      22.4/ -89.6 +5.46/+4.82  +27.2/-12.8  25.9     1.04     19.1
3     -11.2/-212.8 +4.50/+3.55  +26.8/-12.8  25.8     1.03     18.6


     10 December 2004 - GMT Day 345 Beta = 30.4 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 -2.73/-3.68  +00.0/+00.0  07.0     0.00      0.0
2      44.8/ -05.6 +6.44/+5.47  +28.0/-13.6  25.9     1.03     20.7
3     -50.4/-190.4 +5.15/+4.51  +26.8/-13.2  25.8     1.02     20.2

     V/T LEVEL CHANGES
ORB#           AOS TIME   LVL FR-TO
-----          --------   ---------
-None this report period


                              APPENDIX E
                         UARS ANOMALY REPORTS
                     Week ending 10 December 2004

                     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
------    ------    -----     ----      ---       -----------------
04-086    FOT       See List  Nov 04    30832     Generic Late Acquisition

                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
------    ------    -----     ----      ---       -----------------
-None this report period.