UARS Weekly Status Report

4 February 2005




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                UARS WEEKLY STATUS REPORT - 04 FEB 2005

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

Nothing received.

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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 2004269 has been reprocessed and archived at the GSFC DAAC.  HEPSA data
between 2004270 and 2004279 are currently being processed.

     MEPS data files are version 1.  Processed MEPS data files at the DAAC 
archive are between 1991274 and 2004239.  MEPS data between 2004240 and 2004259
are waiting for archival at the DAAC.  MEPS data between 2004260 and 2004279 
are waiting archival at GSFC 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 
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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 22 January 2005 (Orbit 73150, GMT Day 022) through
28 January 2005 (Orbit 73255, GMT Day 028).

                         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
       PEM           025/1310      73204     PEM AXIS 1 ON

The beta angle ranged between the angles of 35.0 degrees to 38.5
degrees for this report period.  The beta angle is now decreasing
towards a minimum angle of 1.0 degrees on 12 February 2005 (DOY 043).

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 0.97 to 1.33 degrees C.  Additional
battery performance data for each battery on 21 January 2005 and 28
January 2005 are provided in Appendix D.

The clock error ranged from 10.0 to -10.7 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         =    03

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

    FOT       =    02
    PEM       =    01

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

    FOT       =    01

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

                        GROUND SYSTEM OPERATION

One (1) operational support problem 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 batteries have performed nominally and the MPS continues to
utilize the VT-7 charge rate.

The FOT also continued their CMS software acceptance testing this
week.  The goal for completion is no later than end of January 2005.

                               MEETINGS

The FOT attended their bi-weekly meeting with the HRDI PI team on 26
January 2005.  The results of FDFs analysis were discussed and
unfortunately the new solutions did not provide HRDI with better
attitude knowledge.  Any more future attempts are pending funding and
on hold for the time being.


                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 12 February 2005 (DOY 043).
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 28 January 2005

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
73204   025/1310   05-030   PEM         PEM AXIS 1 ON
73219   026/1341   05-031   OBC         CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
73237   027/1733   05-032   OBC         CLK ADJ FR 20.6 TO 0.0 MSEC/DAY



                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                      Week ending 28 January 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 28 January 2005

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
73219          026/1341               CLK ADJ FR 0.0 TO 20.6 MSEC/DAY
73237          027/1733               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                      Week ending 28 January 2005

     21 January 2005 - GMT Day 021 Beta = 30.7 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 -3.05/-1.80  +00.0/+00.0  07.0     0.00      0.0
2      50.4/ -11.2 +9.39/+8.39  +28.4/-15.2  26.7     1.05     21.0
3     -00.0/-123.6 +7.08/+6.43  +26.4/-14.8  26.7     1.04     19.7

     28 January 2005 - GMT Day 028 Beta = 38.5 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 -1.79/-2.73  +00.0/+00.0  06.9     0.00      0.0
2     156.8/  22.4 +9.73/+8.40  +27.2/-14.8  26.9     1.08     19.1
3      22.4/ -78.4 +7.41/+6.44  +25.6/-14.4  26.7     1.07     18.2


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


                              APPENDIX E
                         UARS ANOMALY REPORTS
                      Week ending 28 January 2005

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-001    FOT       73213     026/0428  30832     Generic Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT    TIME      CDS    PROBLEM/DATA LOSS
------    ------    -----    ----      ---    -----------------
05-003    MPS       73100    018/1538  N/A   PMON GRP 31 AND ACTION 23 OOL
05-004    MACS      73134    020/2122  N/A   Pitch Wheel Anomaly

                ANOMALY INVESTIGATION REPORTS GENERATED
AIR NO.   SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-002    MACS      73134     020/2122  N/A       Pitch Wheel Anomaly

                         OPEN ANOMALY REPORTS
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-001    FOT       See List  Jan 05    30832     Generic Late Acquisition
05-002    MPS       73008     012/1251  NA        BATT 3 Diff Voltage High