UARS Weekly Status Report

7 November 2003




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                UARS WEEKLY STATUS REPORT -  7 November 2003

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

SOLSTICE continus to operate in good health gathering solar data on all 
available orbital tracking periods. This week we received about 60% of 
each day's data amounting to about 550 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
***********

     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.

     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.

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

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

Nothing received.
                  
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FOT
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                           REPORTING PERIOD

This  report covers 25 October 2003 (Orbit 66307, GMT Day 298) through
31 October 2003 (Orbit 66412, GMT Day 304).


                         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 (Z/H)     298/1220      66315     DAY ONLY TO FULLTIME OPS
       PEM (Z/H)     301/2005      66365     FULLTIME TO DAY ONLY OPS
       PEM AXIS      301/2227      66366     AXIS-2 OFF
       PEM (Z/H)     302/1538      66377     DAY ONLY TO FULLTIME OPS
       PEM (Z/H)     303/1208      66390     FULLTIME TO DAY ONLY OPS
       HALOE         303/1310      66390     POWER ON


The  beta  angle  ranged between the angles of 65.5  degrees  to  42.7
degrees  for  this  report period.  The beta angle is  now  decreasing
towards a minimum angle of 0 degrees on 11 November 2003 (DOY 315).

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 1.26 to 1.29 degrees C.  Additional
battery performance data for each battery on 24 October and 31 October
2003 are provided in Appendix D.

The  clock  error  ranged from -10.6 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     =    00
    SOLSTICE  =    00
    PEM       =    05
    HALOE     =    01
    HRDI      =    00



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

    FOT  =    02

One  (1) Anomaly Report 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

Another preliminary delivery of the new Eclipse software release was
installed on the prototype on 30 October 2003.  This delivery
contained fixes for the problems found in the previous preliminary
build as well as the additional functionality to support DSN contacts.
The DSN command functionality was tested with Canberra on 31 October
2003.  Test commands were sent and received properly by the DSN
station.  The FOT is now satisfied in its ability to command through a
DSN station using the Eclipse system.  The telemetry portion of DSN
capability will be tested in the upcoming weeks.

The CMS software developer found the source of the problem with new
CMS code.  A change was made to a formula, which determines the size
of the ephemeris file to be built.  Initial tests showed positive
results, but more analysis will be done early next week with the
simulator.  If the outcome is successful another release of the CMS
software will be delivered containing this new fix.

In parallel, the FOT is also working with the FSW group to review and
test the new flight software uplink procedure.  Testing has gone well
so far and should be completed by the second week in November so that
the end-to-end testing can begin.



                               MEETINGS


-None this report period


                       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 31 October 2003

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
66315   298/1220   03-281   PEM (Z/H)   DAY ONLY TO FULLTIME OPS
66346   300/1400   03-282   OBC/CLK     CLK ADJ FR 20.6 TO 0.0  MSEC/DAY
66365   301/2005   03-283   PEM (Z/H)   FULLTIME TO DAY-ONLY OPS
66366   301/2227   03-284   PEM AXIS    AXIS-2 OFF
66377   302/1538   03-285   PEM (Z/H)   DAY ONLY TO FULLTIME OPS
66379   302/1857   03-286   OBC/CLK     CLK ADJ FR 0.0 TO 20.6  MSEC/DAY
66390   303/1208   03-287   PEM (Z/H)   TO DAY-ONLY OPS
66390   303/1310   03-288   HALOE       POWER ON
66400   304/0429   03-289   OBC/CLK     CLK ADJ FR 20.6 TO 0.0  MSEC/DAY



                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                      Week ending 31 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 31 October 2003

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
66346          300/1400               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
66379          302/1857               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
66400          304/0429               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY



                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                      Week ending 31 October 2003

     24 October 2003 - GMT Day 297 Beta = 67.3 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 -2.74/-4.31  +00.0/+00.0  07.2     0.000     0.0
2     +11.2/-22.4  +3.55/+1.97  +19.2/-15.2  26.7     1.050    15.7
3     +11.2/-33.6  +2.60/+1.34  +18.8/-14.8  26.7     1.050    15.4


     31 October 2003 - GMT Day 304 Beta = 42.7 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/-4.63   +00.0/+00.0 07.2     0.000     0.0
2     +11.2/-50.4  +5.79/+4.50   +26.4/-15.2 24.6     1.050    20.5
3     +16.8/-67.2  +4.50/+3.23   +25.6/-15.2 24.5     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 31 October 2003

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
03-050    FOT       66311     298/0712  30832     Generic Late Acquisition
03-050    FOT       66356     301/0703  30832     Generic Late Acquisition

                 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