UARS Weekly Status Report

11 March 2005




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                UARS WEEKLY STATUS REPORT - 11 MAR 2005

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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 
46% of each day's data amounting to about 524 minutes of solar 
observing time per day.

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

During this past week, 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.

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

     HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2004299 has been reprocessed and archived at the GSFC DAAC.  HEPSA data
between 2004300 and 2004359 are currently waiting archival at GSFC DAAC.  

     MEPS data files are version 1.  Processed MEPS data files at the DAAC 
archive are between 1991274 and 2004309.  MEPS data between 2004310 and 2004329 
are currently waiting archival at GSFC DAAC.

     PEM continues to receive NMC data files from NOAA.  NMC host machine
changed during mid-January which caused some NMC data transfer failures; 
however, this situation was corrected and recovery completed with the 
assistance of Roger Lin at NOAA.  No problems have been encountered since 
updates have occurred.

     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.

     PEM has received a request for data from the super storm of November
2004.  The Dst value showed sudden commencement early on November 7, 2004
reaching a Dst value of about -380 gamma early on November 8, 2004.
PEM was not active at that time and became active late on November 8, 2004
in day only mode.  A second peak of about -280 gamma was observed on November 
11, 2004.

*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.

***********
HALOE 
***********

HALOE returns to successful operations after the graze period.  All
engineering parameters are within nominal operating values and the
exoatmospheric HF science channel voltage is nominal. All channels are
still being evaluated.  The UARS FOT continues to provide exceptional 
help and attention during the HALOE power on.  The power on process was 
executed in less than twelve minutes, allowing HALOE to capture an 
immediate Sunset. 

***********
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 26 February 2005 (Orbit 73677, GMT Day 057) through
04 March 2005 (Orbit 73781, GMT Day 063).


                         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           058/1353      73701     DAY ONLY TO FULLTIME
       PEM           058/1432      73701     AXIS 1 & 2 ON
       HRDI          062/1935      73764     RESTART


The beta angle ranged between the angles of 52.2 degrees to 63.2
degrees for this report period.  The beta angle is now decreasing
towards a minimum angle of 3.0 degrees on 21 March 2005 (DOY 080).

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 3.91 to 3.23 degrees C.  Additional
battery performance data for each battery on 25 February 2005 and 04
March 2005 are provided in Appendix D.

The clock error ranged from 10.1 to -09.8 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       =    03
    PEM       =    02
    HRDI      =    01


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

    FOT       =    02

Four (4) Anomaly Reports remained OPEN at the end of this report period
(see Appendix E).


                        GROUND SYSTEM OPERATION

Two (2) 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 the FOT continued to monitor the batteries closely.  The MPS
continues to utilize the VT-7 charge rate.

The FOT has completed their CMS software acceptance testing.  All
tests results were positive and the official release of the new
software was installed on the backup CMS.  With the install complete,
the FOT will run a few simulated days of operations to confirm the
software.  Phase 1 of the simulations has been completed.  Some
additional testing/verification will be required next week, as well as
uplink tests to the spacecraft.  If all goes well, then the new
release will be put onto the operational CMS.


                               MEETINGS


The FOT attended the UARS monthly status review on 01 March 2005 to
discuss the significant events for the month of February.


                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 21 March 2005 (DOY 080).  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 04 March 2005

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
73701   058/1353   05-054   PEM         PEM FROM DAY ONLY TO FULLTIME
73701   058/1432   05-055   PEM         AXIS 1 & 2 ON
73707   059/0008   05-056   OBC/CLK     CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
73748   061/1723   05-057   OBC         DUMP OBC BANKS
73764   062/1935   05-059   HDRI        RESTART (BEGIN)
73765   062/2118   05-059   HRDI        RESTART (COMPLETE)
73766   062/2257   05-058   OBC/CLK     CLK ADJ FR 20.6 TO 0.0 MSEC/DAY



                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                       Week ending 04 March 2005

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 04 March 2005

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
73707          059/0033               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
73766          062/2308               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY


                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                       Week ending 04 March 2005

     25 February 2005 - GMT Day 056 Beta = 49.0 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  -1.79/-3.05   +00.0/+00.0  07.0     0.00      0.0
2    168.0/  56.0 +10.40/+9.06   +26.4/-15.2  26.7     1.11     17.0
3     11.2/- 89.6  +7.09/+5.15   +22.4/-14.4  26.7     1.07     16.0


     04 March 2005 - GMT Day 063 Beta = 63.2 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/-3.68   +00.0/+00.0  07.0     0.00      0.0
2    201.6/  89.6  +9.06/+7.74   +20.8/-14.4  27.2     1.10     16.8
3    -22.4/-100.8  +5.15/+4.51   +18.8/-13.2  27.0     1.06     15.9


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


                              APPENDIX E
                         UARS ANOMALY REPORTS
                       Week ending 04 March 2005

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-011    FOT       73699     058/1213  38687     Negative Acquisition
05-012    FOT       73769     063/0306  30832     Generic Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-010    FOT       73616     052/2218  38591     Late Acquisition

                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
------    ------    -----     ----      ---       -----------------
05-005    FOT       See List  Feb 05    30832     Generic Late Acquisition
05-002    MPS       73008     012/1251  N/A       BATT 3 Diff Voltage High
05-011    FOT       73699     058/1213  38687     Negative Acquisition
05-012    FOT       73769     063/0306  30832     Generic Late Acquisition