UARS Weekly Status Report

07 January 2005




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                UARS WEEKLY STATUS REPORT - 07 Jan 2005

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

SOLSTICE continues to perform nominally, taking solar data on all 
available orbital tracking periods. This week we received about 63% of 
each day's data amounting to nearly 556 minutes of solar observing time 
per day.

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

During this past week, the SUSIM experiment 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.

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


The new PEM2K:: is now fully configured and functional.  All communication
paths should function as normal.

HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2004239 has been reprocessed and archived at the GSFC DAAC.  HEPSA data
between 2004240 and 2004249 are currently being processed.

MEPS data files are version 1.  Processed MEPS data files at the DAAC  archive 
are between 1991274 and 2004229.  MEPS data between 2004230 and 2004239
are waiting for archival at the DAAC.

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 
***********

Nothing received.

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

Nothing received.

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

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 25 December 2004 (Orbit 72729, GMT Day 360) through
31 December 2004 (Orbit 72834, GMT Day 366).


                         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
       WINDII        361/0032      72744     QB/PB B ON
       PEM           361/2249      72758     PEM AXIS 1 & 2 OFF
       PEM           361/2347      72759     ZEPS/NEPS DAY-ONLY
       PEM           363/1401      72783     PEM TO FULLTIME
       PEM           363/1401      72783     PEM AXIS 1 & 2 ON
       PEM           365/2236      72818     Z/H FULLTIME TO DAY-ONLY



The beta angle ranged between the angles of 76.7 degrees to 52.3
degrees for this report period.  The beta angle is now decreasing
towards a minimum angle of 2.0 degrees on 12 January 2005 (DOY 012).

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 0.63 to 0.64 degrees C.  Additional
battery performance data for each battery on 24 December and 31
December 2004 are provided in Appendix D.

The clock error ranged from 07.7 to -11.3 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
    PEM       =    05
    WINDII    =    01


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

    FOT       =    03

Three (3) Anomaly Reports 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 FOT continued their CMS software acceptance testing this week.
This testing will continue into the new year.  The goal for completion
is no later than end of January 2005.


                               MEETINGS


-None this report period




                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 12 January 2005 (DOY 012).
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 December 2004

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
72744   361/0032   04-360   WINDII      QB/PB B ON (S/C POWER MGT)
72753   361/1445   04-361   OBC/CLK     CLK ADJ FR 41.2 TO 20.6  MSEC/DAY
72758   361/2249   04-362   PEM         PEM AXIS 1 & 2 OFF
72759   361/2347   04-363   PEM         ZEPS/NEPS DAY-ONLY
72773   362/2202   04-364   MPS         CHANGE V/T LIMIT FROM LV5 TO LV6
72783   363/1401   04-366   PEM         PEM TO FULLTIME
72783   363/1401   04-365   PEM         PEM AXIS 1 & 2 ON
72818   365/2236   04-367   PEM         PEM (Z/H) FROM FULLTIME TO DAY ONLY
72820   366/0052   04-368   OBC/CLK     CLK ADJ FR 20.6 TO 0.0 MSEC/DAY


                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                     Week ending 31 December 2004

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 December 2004

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
72753          361/1510               CLK ADJ FR 41.2 TO 20.6 MSEC/DAY
72820          366/0057               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                     Week ending 31 December 2004

     24 December 2004 - GMT Day 359 Beta = 79.4 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 -1.48/-2.42  +00.0/+00.0  07.0     0.00      0.0
2     -11.2/ -44.8 +2.28/+1.65  +11.6/-12.8  27.7     1.08      9.6
3     -72.8/-184.8 +1.65/+0.71  +11.2/-12.0  27.7     1.07      9.2

     31 December 2004 - GMT Day 366 Beta = 79.4 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 -3.68/-4.62  +00.0/+00.0  07.0     0.00      0.0
2      44.8/ -11.2 +4.51/+3.87  +23.2/-14.4  26.7     1.05     16.7
3     -11.2/ -89.6 +3.23/+2.60  +22.0/-13.6  26.7     1.04     16.1

     V/T LEVEL CHANGES
ORB#           AOS TIME   LVL FR-TO
-----          --------   ---------
72773          362/2202   LV5 -> LV6


                              APPENDIX E
                         UARS ANOMALY REPORTS
                     Week ending 31 December 2004

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-090    FOT       72780     363/0906  30832     Generic Late Acquisition
04-090    FOT       72793     364/0612  30832     Generic Late Acquisition
04-094    FOT       72814     365/1550  30853     Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-091    FOT       72530     346/1854  37847     No UPD/GCMR Capability
04-092    FOT       72635     353/1831  37983     Late Acq. - TDRS West
04-093    FOT       72717     359/0407  37991     No Acq. - TDRS 275

                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
------    ------    -----     ----      ---       -----------------
04-090    FOT       See List  Dec 04    30832     Generic Late Acquisition
04-094    FOT       72814     365/1550  30853     Late Acquisition