UARS Weekly Status Report

06 August 2004




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                UARS WEEKLY STATUS REPORT - 06 AUG 2004

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

This week, SOLSTICE continued to operate in good health gathering solar 
data on all available orbital tracking periods. On average, we received 
64% of each day's data amounting to about 589 minutes of solar 
observing time per day.

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

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

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

     HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2003365 has been reprocessed and archived at the GSFC DAAC.  Processing 
of HEPSA data is temporarily suspended waiting for additional UARS OA data 
processing.

     MEPS data files are version 1.  Processed MEPS data files at the 
DAAC archive are between 1991274 and 2004365.  Processing of MEPS data is 
temporarily suspended waiting for additional UARS OA data processing.

     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.

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

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. The MPG attended the UARS Monthly Status
meeting, held on August 03 to discuss significant events for the
month of July.

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

Nothing received.
                  
***********
FOT
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                           REPORTING PERIOD

This report covers 24 July 2004 (Orbit 70413, GMT Day 206) through  
30 July 2004 (Orbit 70518, GMT Day 212).


                         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
       HALOE         206/1301      70421     POWER ON
       HRDI          209/1502      70467     TO LOW POWER MODE
       PEM           211/1347      70497     AXIS 1 & 2 ON


The beta angle ranged between the angles of 22.2 degrees to 36.8
degrees for this report period.  The beta angle is now increasing
towards a maximum angle of 39 degrees on 01 August 2004 (DOY 214).

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 0.64 to 1.28 degrees C.  Additional
battery performance data for each battery on 23 July and 30 July 2004
are provided in Appendix D.

The clock error ranged from 10.4 to -12.8 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       =    05
    HALOE     =    02
    HRDI      =    01
    PEM       =    01


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

    FOT       =    03

Two (2) Anomaly Reports remained OPEN at the end of this report period
(see Appendix E).


                        GROUND SYSTEM OPERATION

Three (3) 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 testing the new version of the Eclipse ground system
software.  There are several DR fixes incorporated in the build, so
testing will take some time.  The goal for the testing to be complete
is the end of the July.  If all testing is successful the new build
will be released to operations.

The new CMS code to allow for SMA events continued to undergo testing
this week.  Problems receiving products from FDF, transferring the
schedule from UPS to CMS, and system drive issues hindered progress.
While the FDF product and system drive issues have been resolved, the
transfer issue is still under investigation.

                               MEETINGS


-None this report period.

                                   
                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 18 August 2004 (DOY 231).
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 30 July 2004

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
70421   206/1301   04-217   HALOE       POWER ON (PART 1)
70422   206/1441   04-216   OBC/CLK     CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
70423   206/1620   04-218   HALOE       POWER ON (COMPLETE)
70439   207/1802   04-219   OBC/CLK     CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
70467   209/1502   04-220   HRDI        TO LOW POWER MODE DUE TO S/C POWER
70486   210/2046   04-221   OBC/CLK     CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
70497   211/1347   04-222   PEM         AXIS 1 & 2 ON 
70504   212/0223   04-223   OBC/CLK     CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
70508   212/0839   04-224   OBC/CLK     CLK ADJ FR 0.0 TO -20.6 MSEC/DAY


                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                       Week ending 30 July 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 30 July 2004

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
70422          206/1443               CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
70439          207/1809               CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
70486          210/2102               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
70504          212/0225               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
70508          212/0846               CLK ADJ FR 0.0 TO -20.6 MSEC/DAY


                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                       Week ending 30 July 2004

     23 July 2004 - GMT Day 205 Beta = 04.7 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 -3.68/-4.94  +00.0/+00.0  07.0     0.00      0.0
2     -00.0/-44.8  +4.19/+3.23  +27.2/-12.8  26.2     1.01     18.5
3     +11.2/-72.8  +2.92/+2.29  +25.6/-12.8  26.2     1.00     18.1


     30 July 2004 - GMT Day 212 Beta = 36.8 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  07.0     0.00      0.0
2     -00.0/-184.8 +5.15/+4.51  +26.4/-14.4  25.6     1.02     20.0
3     +33.6/-072.8 +4.51/+3.23  +25.6/-14.4  25.6     1.02     19.8

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


                              APPENDIX E
                         UARS ANOMALY REPORTS
                       Week ending 30 July 2004

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS     PROBLEM/DATA LOSS
------    ------    -----     ----      ---     -----------------
04-039    FOT       70477     210/0703  30832   Generic Late Acquisition
04-039    FOT       70492     211/0557  30832   Generic Late Acquisition
04-049    FOT       70501     211/2042  36507   Data Dropout - weather W/S

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS     PROBLEM/DATA LOSS
------    ------    -----     ----      ---     -----------------
04-047    FOT       70367     202/2252  N/A     WS-4 not responding properly
04-048    FOT       70395     204/1920  36444   Data Dropout

                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
------    ------    -----     ----      ---     -----------------
04-039    FOT       See List  July 04   30832   Generic Late Acquisition
04-049    FOT       70501     211/2042  36507   Data Dropout - weather W/S