UARS Weekly Status Report

18 February 2005




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                UARS WEEKLY STATUS REPORT - 18 FEB 2005

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

SOLSTICE has been under daylight only operations for four days this 
week. Normal operations resumed Monday (doy 45). The instrument 
continues to perform well, making the standard set of solar 
observations daily. 

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

SUSIM was turned off on Feb. 11 for the UARS yaw-around and resumed
operations on Feb. 14.  Since then, the 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.

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

     HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2004279 has been reprocessed and archived at the GSFC DAAC.  HEPSA data
between 2004280 and 2004289 are currently waiting archival at GSFC DAAC.  
HEPSA data between 2004290 and 2004299 are currently being processed.

     MEPS data files are version 1.  Processed MEPS data files at the DAAC 
archive are between 1991274 and 2004279.  MEPS data between 2004280 and 2004299 
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.

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HALOE 
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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 05 February 2005 (Orbit 73361, GMT Day 036) through
11 February 2005 (Orbit 73466, GMT Day 042).


                         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         038/2319      73406     POWER OFF (YAW)
       PEM           040/2314      73436     ZEPS/NEPS POWER OFF
       SUSIM         041/2201      73450     POWER OFF
       SOLSTICE      041/2312      73451     FULLTIME TO DAY ONLY


The beta angle ranged between the angles of 21.5 degrees to 05.7
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 0.64 to 0.66 degrees C.  Additional
battery performance data for each battery on 04 February 2005 and 11
February 2005 are provided in Appendix D.

The clock error ranged from 10.4 to -10.1 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       =    02
    HALOE     =    01
    PEM       =    01
    SUSIM     =    01
    SOLSTICE  =    01


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

    FOT       =    06

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 batteries have performed nominally and the MPS continues
to utilize the VT-7 charge rate.

The FOT has completed their CMS software acceptance testing.  The next
step in the process is for the official release of the software to be
installed on the backup CMS.  This will be done by the software
development team next week.  Once that is accomplished, the FOT will
run a few simulated days of operations to confirm the install.  If all
goes well, then the new release will be put onto the operational CMS.



                               MEETINGS


The FOT called a kickoff meeting on 07 February 2005 to start planning
the activities needed to reset the flight software epoch year onboard.
This will be done to prevent a clock rollover, which is scheduled to
occur on 16 September 2005.



                       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 11 February 2005

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
73406   038/2319   05-036   HALOE       POWER OFF (YAW)
73422   040/0100   05-037   OBC         CLK ADJ FR 0.0 TO -20.6  MSEC/DAY
73436   040/2314   05-038   PEM         ZEPS/NEPS POWER OFF
73441   041/0738   05-039   OBC         CLK ADJ FR -20.6 TO 0.0  MSEC/DAY
73450   041/2201   05-040   SUSIM       POWER OFF
73451   041/2312   05-041   SOLSTICE    FULLTIME TO DAY ONLY

                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                     Week ending 11 February 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 11 February 2005

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
73422          040/0102               CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
73441          041/0739               CLK ADJ FR -20.6 TO 0.0 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                     Week ending 11 February 2005

     04 February 2005 - GMT Day 035 Beta = 28.1 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    -5.6/ -67.2  +10.06/+9.06   +28.4/-15.2  26.7     1.07     20.9
3    22.4/ -72.8   +7.74/+7.09   +26.8/-14.4  26.7     1.05     20.1

     11 February 2005 - GMT Day 042 Beta = 05.7 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   -2.42/-3.68   +00.0/+00.0  07.0     0.00      0.0
2    67.2/  11.2   +8.40/+7.74   +28.0/-12.8  27.0     1.06     18.8
3   -33.6/-112.0   +5.79/+5.15   +25.6/-12.0  26.9     1.04     17.8


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

                              APPENDIX E
                         UARS ANOMALY REPORTS
                     Week ending 11 February 2005

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT    TIME      CDS     PROBLEM/DATA LOSS
------    ------    -----    ----      ---     -----------------
05-005    FOT       73380    037/0655  30832   Generic Late Acquisition
05-005    FOT       73388    037/1919  30832   Generic Late Acquisition
05-005    FOT       73413    039/1117  30832   Generic Late Acquisition
05-008    FOT       73431    040/1517  38482   IP NOC Router Problem (:37)
05-005    FOT       73431    040/1517  30832   Generic Late Acquisition (:42)
05-009    FOT       73448     041/1836  N/A     Mutual Interference

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT    TIME      CDS     PROBLEM/DATA LOSS
------    ------    -----    ----      ---     -----------------
05-006    WSGT      73303    032/0336  38406   WS not sending UPDs for
multip
05-007    FOT       73344    034/2039  N/A     SUSIM RESET

                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
05-008    FOT       73431    040/1517  38482   IP NOC Router Problem (:37)
05-009    FOT       73448    041/1836  N/A     Mutual Interference