UARS Weekly Status Report

2 July 2004




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                UARS WEEKLY STATUS REPORT -  2 July 2004

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

Nothing received.

***********
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
***********

     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 2003365 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 at the 
DAAC archive are between 1991274 and 2002079. MEPS data files between
2002080 and 2002119 are waiting for DAAC collection.

     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.

     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 April 6-7 of 2000, March 31 - April 1 of 2001, April 11-12 
of 2001, and November 6-7 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.
                  
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FOT
***********

                           REPORTING PERIOD

This report covers 19 June 2004 (Orbit 69886, GMT Day 171) through  
25 June 2004 (Orbit 69991, GMT Day 177).


                         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
       HALOE         171/2259      69901     POWER OFF
       PEM/AXIS      174/2250      69946     POWER OFF
       PEM           177/1221      69984     POWER OFF (S/C LOW PWR)


The beta angle ranged between the angles of 52.0 degrees to 76.3
degrees for this report period.  The beta angle is now increasing
towards a maximum angle of 80 degrees on 27 June 2004 (DOY 180).

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 1.27 degrees C.  Additional
battery performance data for each battery on 18 June and 25 June 2004
are provided in Appendix D.

The clock error ranged from 11.5 to -12.6 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       =    05
    HALOE     =    01
    SUSIM     =    02
    PEM       =    02

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

    FOT  =    04

One (1) Anomaly Report remained OPEN at the end of this report period
(see Appendix E).

                        GROUND SYSTEM OPERATION

Four (4) 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


This week UARS is flying through its high beta period.  The power
margin during this period is always very difficult to estimate.  The
FOT will be closely monitoring power and adjusting instrument status
throughout this period if needed.  Instrument teams will be informed
if the status of their instrument is changed.

This week the FOT received the new Eclipse software build.  It has
been installed on the prototype machine and testing will begin next
week.  There were several DR fixes incorporated in this build, so
testing will take a few weeks before this build will be ready for
operations.

                               MEETINGS


The FOT attended the biweekly meeting with the HRDI team to discuss
the attitude error seen in their data.  FDF and Joe Hashmall continue
to perform independent analysis to try to isolate the source of this
problem.  Their focus for the next few weeks will be the TAM residuals
and digitization affects and the UFLTR tuning.

                                   
                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 17 July 2004 (DOY 199).  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 25 June 2004

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
69898   171/1857   04-172   OBC/CLK     CLK ADJ FR 0.0 TO 20.6  MSEC/DAY
69901   171/2259   04-173   HALOE       POWER OFF
69911   172/1459   04-174   SUSIM       EXCEPTION CLEAR
69925   173/1413   04-175   SUSIM       AZIMUTH COMMANDS
69931   173/2254   04-176   OBC/CLK     CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
69946   174/2250   04-177   PEM/AXIS    POWER OFF
69950   175/0503   04-178   OBC/CLK     CLK ADJ FR 0.0 TO 20.6  MSEC/DAY
69951   175/0744   04-179   OBC/CLK     CLK ADJ FR 20.6 TO 41.2  MSEC/DAY
69980   177/0459   04-180   OBC/CLK     CLK ADJ FR 41.2 TO 20.6  MSEC/DAY
69984   177/1221   04-181   PEM         POWER OFF (S/C LOW PWR)


                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                       Week ending 25 June 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 25 June 2004

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
69898          171/1857               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
69931          173/2305               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
69950          175/0503               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
69951          175/0748               CLK ADJ FR 20.6 TO 41.2 MSEC/DAY
69980          177/0459               CLK ADJ FR 41.2 TO 20.6 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                       Week ending 25 June 2004


     18 June 2004 - GMT Day 170 Beta = 46.8 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 -3.68/-4.94  +00.0/+00.0  07.0     0.00      0.0
2     +11.2/-179.2 +4.83/+3.87  +25.2/-14.4  25.4     1.03     22.0
3     +16.8/-112.0 +3.87/+2.60  +24.8/-14.4  25.4     1.02     21.0

     25 June 2004 - GMT Day 177 Beta = 76.3 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 -2.42/-3.05  +00.0/+00.0  07.0     0.00      0.0
2     +05.6/-156.8 +2.60/+1.34  +14.4/-14.4  24.3     1.01     12.6
3     +11.2/-089.6 +1.97/+0.71  +14.4/-14.4  24.3     1.00     12.6


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


                              APPENDIX E
                         UARS ANOMALY REPORTS
                       Week ending 25 June 2004

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-032    FOT       69952     175/0927  30832     Generic Late Acquisition
04-032    FOT       69981     177/0747  30832     Generic Late Acquisition
04-032    FOT       69988     177/1759  30832     Generic Late Acquisition
04-032    FOT       69989     177/1949  30832     Generic Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-033    FOT       69861     169/0702  36148     43 Second Telemetry
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
------    ------    -----     ----      ---       -----------------
04-032    FOT       See List  June 04   30832     Generic Late Acquisition