UARS Weekly Status Report

12 November 2004




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                UARS WEEKLY STATUS REPORT - 12 Nov 2004

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

Nothing received.

***********
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.

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

     HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2004199 has been reprocessed and archived at the GSFC DAAC.

     MEPS data files are version 1.  Processed MEPS data files at the 
DAAC archive are between 1991274 and 2004199.

     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.

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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 30 October 2004 (Orbit 71887, GMT Day 304) through
05 November 2004 (Orbit 71992, GMT Day 310).


                         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           304/2349      71902     POWER OFF - ZEPS/NEPS
       SUSIM         305/2204      71916     POWER OFF
       SOLSTICE      305/2309      71916     FULLTIME TO DAY ONLY
       SOLSTICE      309/1306      71971     DAY ONLY TO FULLTIME
       SUSIM         309/1550      71972     POWER ON


A Reverse-to-Forward Yaw Around maneuver (number 134) was successfully
executed in Orbit 71941 beginning 307/ 15:08:42Z and completing at
307/ 15:45:52Z on 02 November 2004.  All instruments were in their off
or standby mode (except for SOLSTICE in day-only).  Due to the SA
position at 269 degrees, the effective night length of the spacecraft
after the maneuver was approximately 55.71 minutes.  Post maneuver
analysis of data indicate that during the Yaw Around, the end-of-night
load bus voltage was 26.24 volts and the average depths of discharge
(DODs) on Batteries 2 and 3 were approximately 19.81 and 19.34 percent
respectively.  The next (forward-to-reverse) YAW is scheduled for 02
December 2004 (DOY 337).

The beta angle ranged between the angles of 13.8 degrees to 12.3
degrees for this report period.  The beta angle is now increasing
towards a maximum angle of 38 degrees on 18 November 2004 (DOY 323).

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 0.96 degrees C.  Additional
battery performance data for each battery on 29 October and 05
November 2004 are provided in Appendix D.

The clock error ranged from 10.0 to -10.6 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  =    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       =    01
    SUSIM     =    02
    SOLSTICE  =    02

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

    FOT       =    04

Three (3) Anomaly Reports 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


The FOT took their first SMA pass with the spacecraft last week.  Even
though the CMS is not able to receive the SMA contacts, the FOT was
able to schedule an SMA event on the UPS.  The test was successful
with commands and dumps performing properly.  Further use of the TDRS
SMA service will be postponed until the transfer issue between UPS and
CMS can be resolved.

The few test SMA events, which were scheduled via the workaround
feature on the UPS, were confirmed by scheduling this week.  The test
events were deleted by the FOT, but the test verified the successful
execution of the workaround throughout the scheduling process.
Therefore no modifications to the FDF-provided UAV file will be
necessary.


                               MEETINGS


The FOT attended the biweekly meeting with the HRDI team on 03
November 2004 to discuss the progress in acquiring better attitude
knowledge for their data.

The follow-up meeting with FDF/Software Development scheduled for 04
November 2004 to discuss the rehost of FORMS 3 & 4 and the SMA issues
was cancelled.

                                   
                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 02 December 2004 (DOY 337).
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 05 November 2004

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
71902   304/2349   04-310   PEM         POWER OFF - ZEPS/NEPS
71916   305/2204   04-311   SUSIM       POWER OFF
71916   305/2309   04-312   SOLSTICE    SOLSTICE FULLTIME TO DAY ONLY
71941   307/1427   04-314   MACS        YAW REV TO FWD
71942   307/1634   04-313   OBC/CLK     CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
71962   309/0028   04-315   OBC/CLK     CLK ADJ FR -20.6 TO 0.0 MSEC/DAY
71971   309/1306   04-316   SOLSTICE    SOLSTICE TO FULLTIME
71972   309/1550   04-317   SUSIM       POWER ON : PART 1
71984   310/1155   04-317   SUSIM       POWER ON



                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                     Week ending 05 November 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 05 November 2004

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
71942          307/1634               CLK ADJ FR 0.0 TO -20.6 MSEC/DAY
71962          309/0032               CLK ADJ FR -20.6 TO 0.0 MSEC/DAY

                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                     Week ending 05 November 2004

     29 October 2004 - GMT Day 303 Beta = 14.5 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 -3.05/-4.31  +00.0/+00.0  07.0     0.00      0.0
2      05.6/- 39.2 +5.79/+5.14  +28.4/-13.6  26.2     1.03     20.3
3     -56.0/- 56.0 +4.50/+3.87  +27.2/-13.6  26.2     1.02     19.6

     05 November 2004 - GMT Day 310 Beta = 12.3 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 -3.05/-4.63  +00.0/+00.0  07.0     0.00      0.0
2     -22.4/- 72.8 +5.14/+4.50  +28.0/-12.4  26.6     1.02     18.9
3      00.0/- 78.4 +3.87/+2.91  +26.8/-12.0  26.4     1.03     18.3

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


                              APPENDIX E
                         UARS ANOMALY REPORTS
                     Week ending 05 November 2004

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-066    FOT       71891     304/0718  30832     Generic Late Acquisition
04-066    FOT       71955     308/1309  30832     Generic Late Acquisition
04-083    FOT       71977     310/0025  N/A       UARS Eclipse Serve  Failure
04-084    FOT       71985     310/1303  37501     TDRSS-275 dropouts

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
04-076    FOT       71783     297/0234  37341     Late Acquisition
04-077    FOT       71811     298/2220  37357     Multiple Data Dropouts
04-078    FOT       71826     299/2326  37358     DATA DROPOUTS
04-079    FOT       71834     300/1203  37396     TDRSS 275 Data Dropouts
04-080    FOT       71849     301/1200  37411     TDRSS 275 Dropouts
04-082    WSGT      71861     302/0647  37419     Drop Outs on the Return Link

                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
------    ------    -----     ----      ---       -----------------
04-066    FOT       See List  Oct 04    30832     Generic Late Acquisition
04-083    FOT       71977     310/0025  N/A       UARS Eclipse Server Failure
04-084    FOT       71985     310/1303  37501     TDRSS-275 dropouts