UARS Weekly Status Report

17 October 2003




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                UARS WEEKLY STATUS REPORT - 17 Oct 2003

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***********
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