UARS Weekly Status Report

5 December 2003




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                UARS WEEKLY STATUS REPORT - 05 Dec 2003

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

Nothing received.

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

Nothing received.

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

     The PEM web site has moved.  It has a new URL.  Access the PEM web site
using http://wwwpem.space.swri.edu.  The PEM data from the GUVI conjunction
periods has moved to http://wwwpem.space.swri.edu/guvi-pem.html.

     Level 2 PEM HEPSA data files are being reprocessed for submission to the 
DAAC.  This data has been designated as version 2; however, there is no format
difference from the version 1 data format.  Version 2 HEPSA data is being 
generated because it was discovered that there exists processing errors within
some of the HEPSA version 1 data files.  Thus, if you are using any HEPSA
version 1 data files from the DAAC, please replace them with the version 2
data files.  Currently, HEPSA data between 1991274 and 2002365 has been 
reprocessed and archived at the GSFC DAAC.

     Level 2 PEM MEPS data file documentation is complete and submitted to 
the DAAC.  MEPS data files are version 1.  Processed MEPS data files waiting 
archive at the GSFC DAAC are between 1991274 and 1991329.

     PEM continues to work with the GUVI team on the diagnosis of data from
the first conjunction period.  Analysis of the two conjunction passes showed
that the aurora as detected by GUVI was at higher latitude than UARS.  
GUVI images from other times from the first conjunction period show spatial
regions that both GUVI and PEM sampled when aurora was present.  Separation
is several minutes to 10's of minutes when both instruments saw aurora. 
PEM has seen no aurora during the second conjunction period.  Due to a 
spacecraft anomaly, no PEM data was collected during the third conjunction 
period.

     PEM continues to receive NMC data files from NOAA.  No problems have
been encountered.  NOAA has changed the binary structure of the NMC data and
PEM is now receiving two data streams, one in the original VAX format and the
other from their new binary format.



*Beginning of power orbit day (PEM activation): array current >5 amps, array 
     voltage >53.5 volts, and battery current >2.0 amps.  
 End of power orbit day (PEM deactivation): time in power orbit day >4 minutes,
     array current <9 amps, and battery currents <0.2 amps.
 Power orbit day variation: ~39-40 min at yaw to ~50-51 min at maximum beta.

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

Nothing received.

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

Nothing received.

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

Nothing received.

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

Nothing received.

***********
MPG
***********

The MPG attended the UARS Mission Status Review meeting and
the 3TDRSS Status meeting, both held on 2 December 2003.

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 22 November 2003 (Orbit 66743, GMT Day 326) through
28 November 2003 (Orbit 66833, GMT Day 332).


                         SPACECRAFT OPERATION

The observatory is now in Forward Flight (Southern Hemisphere viewing)
and   is  performing  nominally  under  two-battery  operations.   The
instrument operational changes were:


                    INSTRUMENT OPERATIONAL CHANGES

       Instrument    Time          Orbit     Comment
       NONE THIS REPORT PERIOD.



The  beta  angle  ranged between the angles of 32.8  degrees  to  34.7
degrees  for  this  report period.  The beta angle is  now  decreasing
towards a minimum angle of 0 degrees on 11 December 2003 (DOY 345).

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 0.95 to 1.29 degrees C.  Additional
battery  performance  data for each battery  on  21  November  and  28
November 2003 are provided in Appendix D.

The  clock  error  ranged from -10.1 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       =    02
    SUSIM     =    00
    SOLSTICE  =    00
    PEM       =    00
    HALOE     =    00
    HRDI      =    00



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

    FOT  =    00

One  (1) 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 problem found with the CMS-B pollers has been resolved.  Once the
CMS-B connectivity issue is resolved the remainder of the new CMS code
acceptance testing can be completed.

The FSW group has completed the testing of the new flight software
uplink and remove procedures.  A few contingency tests will be run
next week and then the FSW portion of the 3 TDRS preparation will be
finished.  End-to-end tests with all entities, DSN testing and FOD
training are the remaining tasks before the uplink can be executed.

                               MEETINGS


-None this report period.




                       FUTURE SIGNIFICANT EVENTS

The  next  UARS Yaw slew is scheduled for 11 December 2003 (DOY  345).
This  maneuver will be a Forward to Reverse Flight maneuver  (Northern
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 28 November 2003

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
66807   331/0538   03-305   OBC/CLK     CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
66824   332/0854   03-306   OBC/CLK     CLK ADJ FR 20.6 TO 0.0 MSEC/DAY


                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                     Week ending 28 November 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 28 November 2003

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
66807          331/0538               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
66824          332/0858               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY


                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                     Week ending 28 November 2003

     21 November 2003 - GMT Day 325 Beta = 31.5 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     +05.6/-156.8 +5.79/+4.50  +28.4/-14.4  25.1     1.040    20.9
3     +16.8/-72.8  +5.14/+3.87  +27.6/-15.2  25.0     1.030    20.7

     28 November 2003 - GMT Day 332 Beta = 34.7 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  07.2     0.000     0.0
2     +11.2/-156.8 +5.79/+4.50  +27.2/-14.8  24.8     1.040    20.5
3     +16.8/-89.6  +4.82/+3.87  +26.8/-15.2  24.6     1.040    20.0

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



                              APPENDIX E
                         UARS ANOMALY REPORTS
                     Week ending 28 November 2003

                     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
------    ------    -----     ----      ---       -----------------
03-054    ECLIPSE   66625     319/0421  N/A       Configs Crashed

                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
------    ------    -----     ----      ---       -----------------
03-052    FOT       See List  Nov 03    30832     Generic Late Acquisition