UARS Weekly Status Report

22 October 2004




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                UARS WEEKLY STATUS REPORT - 22 Oct 2004

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

SOLSTICE continues to perform nominally, taking solar data on all 
available orbital tracking periods. This week we received about 61% of 
each day's data amounting to nearly 685 minutes of solar observing time 
per day.

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

SUSIM successfully gathered daily mid (1.1 nm) resolution, MgII,
occultation, solar pointing offset, and continuous monitoring
scans for time periods with UARS telemetry or tape recording.

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

     HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2004179 has been reprocessed and archived at the GSFC DAAC.  HEPSA Level 2
data files from 2004180 to 2004189 are processed and waiting for archiving.

     MEPS data files are version 1.  Processed MEPS data files at the 
DAAC archive are between 1991274 and 2004139.

     PEM continues to receive NMC data files from NOAA.  No problems have
been encountered.

     The PEM data from the GUVI conjunction periods may be found at 
http://wwwpem.space.swri.edu/guvi-pem.html.  The additional electron data for 
the October and November storms of 2003 has been moved and is now located at 
http://climatology.space.swri.edu/uars_fromRudy.html.  For those users of 
SDDAS, update your UARS Meta data and these data times will appear
with full functionality.  Proton data from these storms are now located at
http://climatology.space.swri.edu/UARS_images_from_Rudy_(Apr._2004).html

     Requests have been received for storm spectral data.  Overview plots were 
produced and these plots may be found on the web at
http://climatology.space.swri.edu/UARS_images_postedJune2004.html
for the storms of October 29 of 1991, November 8-9 of 1991, April 6-7 of 2000, 
March 31 - April 1 of 2001, April 11-12 of 2001, November 6-7 of 2001, and 
November 11-12 of 2001.

*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 
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Nothing received.

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MLS
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Nothing received.

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HRDI
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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 09 October 2004 (Orbit 71571, GMT Day 283) through
15 October 2004 (Orbit 71676, GMT Day 289).


                         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           284/1248      71594     PEM Z/N DAY ONLY TO FULL
       PEM           284/1354      71595     PEM AXIS 1 & 2 ON
       PEM           286/0043      71616     POWER ON (OFF TO FULL)
       PEM           286/1607      71626     PEM RESET `TIMING ERROR'


The beta angle ranged between the angles of 61.3 degrees to 65.1
degrees for this report period.  The beta angle is now decreasing
towards a minimum angle of 0 degrees on 02 November 2004 (DOY 307).

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 0.94 degrees C.  Additional
battery performance data for each battery on 08 October and 15 October
2004 are provided in Appendix D.

The clock error ranged from 10.8 to -10.1 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  =    01
    ALERTS         =    00

The following real-time command sheets were executed for the listed
operational element(s) during this report period (see Appendix A).

    FOT  =    04
    PEM  =    04


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

    FOT       =    07

Six (6) Anomaly Reports remained OPEN at the end of this report period
(see Appendix E).


                        GROUND SYSTEM OPERATION

Seven (7) 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


A problem was found in the new release of the CMS code.  The issue is
believed to be with the namelist files, but software development is
looking into the exact cause.  FDF has also been asked to provide a
User Antenna Views file, which contains SMA codes.  This is needed to
complete the CMS processing of SMA supports.  A meeting will be held
with FDF to discuss this issue on 21 October 2004.  These two problems
have delayed the release of the new CMS code to operations.  No new
date has been set for completion.


                               MEETINGS


-None this report period


                                   
                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 02 November 2004 (DOY 307).
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 15 October 2004

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
71582   283/1725   04-289   OBC/CLK     CLK ADJ FR 20.6 TO 0.0  MSEC/DAY
71594   284/1248   04-290   PEM         PEM Z/N DAY ONLY TO FULL-TIME
71595   284/1354   04-291   PEM         PEM AXIS 1 & 2 ON
71607   285/0923   04-292   OBC/CLK     CLK ADJ FR 0.0 TO 20.6  MSEC/DAY
71613   285/1902   04-293   MPS         VT LEVEL 6
71616   286/0043   04-294   PEM (Z/H)   POWER ON (OFF TO FULLTIME)
71617   286/0118   04-294   PEM (Z/H)   PMON GROUP-10 DISABLED
71626   286/1607   04-295   PEM (Z/H)   PEM RESET 'TIMING ERROR'
71648   288/0326   04-296   SSPP        OBC MODE



                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                      Week ending 15 October 2004

The following Out-Of-Limits occurrences were detected:

MNEMONIC       STATE   DESCRIPTION                ORBITS
--------       -----   -----------                ------
PEHVU330VIE    Y-HI    HVU3 +30V CURRENT MONITOR  71629


The following ALERT occurrences were detected:

MNEMONIC     DESCRIPTION                          ORBITS
--------     -----------                          ------
-None this report period.



                              APPENDIX C
                 CLOCK & SOLAR ARRAY RATE CORRECTIONS
                      Week ending 15 October 2004

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
71582          289/1750               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
71607          292/0927               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                      Week ending 15 October 2004

     08 October 2004 - GMT Day 282 Beta = 55.4 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/-4.63  +00.0/+00.0  07.0     0.00      0.0
2     -22.4/- 89.6 +4.50/+2.60  +23.2/-15.2  26.4     1.04     16.5
3     -22.4/-168.0 +3.23/+1.65  +22.0/-14.4  26.2     1.04     16.0

     15 October 2004 - GMT Day 289 Beta = 64.5 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 -3.68/-4.94   +00.0/+00.0 07.0     0.00      0.0
2     -28.0/- 78.4 +3.87/+2.92   +20.0/-14.4 26.7     1.04     16.7
3     -33.6/-179.2 +2.60/+1.66   +18.8/-13.2 26.7     1.04     15.7

     V/T LEVEL CHANGES
ORB#           AOS TIME   LVL FR-TO
-----          --------   ---------
71613          285/1902   LV5 -> LV6

                              APPENDIX E
                         UARS ANOMALY REPORTS
                      Week ending 15 October 2004

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS     PROBLEM/DATA LOSS
------    ------    -----     ----      ---     -----------------
04-068    FOT       71572     283/0233  37190   WSGT DROPOUT/FAILOVER
04-069    FOT       71587     284/0230  37194   WSGT Equip Failover
04-070    FOT       71590     284/0559  37195   WSGT Dropout
04-071    FOT       71616     286/0043  N/A     PEM IN WRONG MODE - OFF!
04-066    FOT       71632     287/0115  30832   Generic Late Acquisition
04-072    FOT       71648     288/0302  N/A     SSPP In stow due to eclipse
04-066    FOT       71672     289/1743  30832   Generic Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-067    FOT       71552     281/1730  37177     Data Drop Out

                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
------    ------    -----     ----      ---     -----------------
04-066    FOT       See List  Oct 04    30832   Generic Late Acquisition
04-068    FOT       71572     283/0233  37190   WSGT DROPOUT/FAILOVER
04-069    FOT       71587     284/0230  37194   WSGT Equip Failover
04-070    FOT       71590     284/0559  37195   WSGT Dropout
04-071    FOT       71616     286/0043  N/A     PEM IN WRONG MODE - OFF!
04-072    FOT       71648     288/0302  N/A     SSPP In stow due to eclipse