UARS Weekly Status Report

03 January 2003




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                UARS WEEKLY STATUS REPORT -  3 Jan 2003

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***********
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.

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ACRIM
***********

Nothing received.

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

Nothing received.

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

Nothing received.

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

Nothing received.

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

Nothing received.

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WINDII
***********

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 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