UARS Weekly Status Report

20 June 2003




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                UARS WEEKLY STATUS REPORT - 20 June 2003

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

For three days this week, SOLSTICE was powered only during daylight to 
support the yaw maneuver. Otherwise, solar data were collected on all 
available orbital tracking periods.

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

SUSIM was powered off June 14-17.  Otherwise, the instrument
has successfully gathered all of its daily mid resolution,
weekly offset, and O2 occultation scans this past week during
periods of UARS telemetry or during periods of onboard tape
recording.

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

Nothing received.

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

Nothing received.

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

Nothing received.

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

Nothing received.

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

Nothing received.

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

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

Nothing received.
                  
***********
FOT
***********

                           REPORTING PERIOD

This report covers 07 June 2003 (Orbit 64202, GMT Day 158) through  13
June 2003 (Orbit 64307, GMT Day 164).


                         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
       PEM AXIS      160/0138      64233     POWER OFF
       HALOE         161/0135      64248     POWER OFF
       PEM           163/2242      64306     POWER OFF
       SUSIM         164/2205      64306     POWER OFF
       SOLSTICE      164/2239      64306     POWER OFF



The  beta  angle  ranged between the angles of  25.8  degrees  to  7.9
degrees  for  this  report period.  The beta angle is  now  decreasing
towards a minimum angle of 0 degrees on 14 June 2003 (DOY 165).

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 0.96 to 1.28 degrees C.  Additional
battery performance data for each battery on 06 June and 13 June  2003
are provided in Appendix D.

The  clock  error  ranged from 10.3 to 10.7 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       =    00



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

    FOT  =    01

Two  (2) Anomaly Reports 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


The new build of Eclipse software (Build 2.0.2) was delivered to the
prototype system on 29 May 2003.  FOT testing of this build began on
30 May 2003 and continued throughout this week.  Once testing has been
completed some parallel operations will be run before the build is
released for operations.


                               MEETINGS


The  FOT also attended the weekly UARS DRB on 10 June 2003, to  review
the  open  DRs  and  discuss the testing status  of  the  new  Eclipse
software delivery.


                       FUTURE SIGNIFICANT EVENTS

The  next UARS Yaw slew is scheduled for 14 June 2003 (DOY 165).  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 13 June 2003

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
64233   160/0138   03-138   PEM AXIS    POWER OFF
64248   161/0135   03-139   HALOE       POWER OFF
64261   161/2212   03-140   OBC/CLK     CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
64280   163/0446   03-141   OBC/CLK     CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
64292   163/2242   03-142   PEM         POWER OFF
64306   164/2205   03-143   SUSIM       POWER OFF
64306   164/2239   03-144   SOLSTICE    DAY-ONLY OPS


                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                       Week ending 13 June 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 13 June 2003

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
-None this report period.



                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                       Week ending 13 June 2003

     06 June 2003 - GMT Day 157 Beta = 28.3 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/-4.31  +00.0/+00.0  07.2     0.000     0.0
2   +00.0/-179.2  +5.47/+4.51  +27.2/-14.8  24.5     1.030    20.5
3   +16.8/-67.2   +4.51/+3.23  +26.4/-14.4  24.3     1.020    20.3








     13 June 2003 - GMT Day 164 Beta = 7.9 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  -3.68/-4.62  +00.0/-50.0  07.2     0.000     0.0
2   +11.2/-95.2   +5.47/+4.51  +26.4/-50.0  23.8     1.020    21.0
3   +22.4/-67.2   +4.51/+3.23  +25.6/-50.0  23.8     1.010    20.5

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


                              APPENDIX E
                         UARS ANOMALY REPORTS
                       Week ending 13 June 2003

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
03-028    FOT       64273     162/1731  32952     Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
03-028    FOT       64273     162/1731  32952     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
------    ------    -----     ----      ---       -----------------
03-027    FOT       See List  June 03   30832     Generic Late Acquisition
03-028    FOT       64273     162/1731  32952     Late Acquisition