UARS Weekly Status Report

05 August 2005




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                UARS WEEKLY STATUS REPORT - 05 AUG 2005

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

This week SOLSTICE was in day only mode until Monday evening at  
05/213-23:43 when it was powered off completely. As usual, the  
instrument worked wonderfully until it's shut down, taking solar data  
on all available orbital tracking periods. 

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

As far as is determined at this time, SUSIM has successfully
completed its complete set of lamp and reference scans from July 30
through August 1. Earlier, daily mid (1.1 nm) resolution, MgII, and
continuous monitoring scans for time periods with UARS telemetry or
tape recording were successfully performed.

SUSIM's final data was gathered on August 1.  No more operations are
planned.

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

HEPSA data files are version 2.  Currently, HEPSA data between 1991274 
and 2004273 has been reprocessed and archived at the GSFC DAAC.  HEPSA data 
between 2004274 and 2005079 has been processed and is waiting for archival
at the DAAC.  HEPSA data for 2005080 to 2005089 is currently being processed.

MEPS data files are version 1.  Processed MEPS data files at the DAAC 
archive are between 1991274 and 2004259.  MEPS data between 2004260 and
2005089 has been processed and is waiting for DAAC archival.  

HEPSB data files are version 1.  HEPSB processing code has been generated
and is currently under testing.

PEM continues to receive NMC data files from 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.  PEM became active in day-light only mode late on November 8.  PEM
survey spectrograms for November 8-18 of 2004 may be found at:
http://climatology.space.swri.edu/UARS_images_fromRudy.html

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

Nothing received.

***********
MLS
***********

Nothing received.

***********
HRDI
***********

Nothing received.

***********
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 23 July 2005 (Orbit 75889, GMT Day 204) through  29
July 2005 (Orbit 75993, GMT Day 210).


                         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
       SOLSTICE      207/1353      75942     FULLTIME TO DAY-ONLY
       HALOE         208/0412      75951     POWER OFF


The beta angle ranged between the angles of 37.2 degrees to 34.0
degrees for this report period.  The beta angle is now decreasing
towards a minimum angle of 4 degrees on 09 August 2005 (DOY 221).

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 6.23 to 5.85 degrees C.  Additional
battery performance data for each battery on 22 July 2005 and 29 July
2005 are provided in Appendix D.

The clock error ranged from 05.1 to -10.3 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
    SOLSTICE  =    01
    HALOE     =    01


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

    FOT       =    02

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


                        GROUND SYSTEM OPERATION

One (1) 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

On Monday 11 July 2005 the results of the senior review at NASA HQ
were received.  The direction given is that UARS will fly with HALOE
observations only until the end of the calendar year, followed by the
decommissioning of the UARS spacecraft in the new year.  Final
calibrations for SUSIM were executed on 30 July and 01 August 2005.
SOLSTICE will perform its final calibration on 04 August 2005.

The UARS OBC clock rollover effort continued this week with the final
testing and simulation runs of the uplink procedure.  All entities are
prepared for the uplink and ready to transition their systems to
support the new epoch year.  The uplink is scheduled for 02 August on
the 214/1409-1435 event, with preliminary setup commanding on the
214/1307 event.  All impacted facilities should take note of the
uplink times and be prepared for the epoch change.


                               MEETINGS

-None this report period.


                       FUTURE SIGNIFICANT EVENTS

The next UARS Yaw slew is scheduled for 09 August 2005 (DOY 221).
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 29 July 2005

ORBIT   AOS        NO.      SUBSYS      REASON
-----   ---        ---      ------      ------
75901   204/2059   05-222   OBC/CLK     CLK ADJ FR 20.6 TO 0.0 MSEC/DAY
75942   207/1353   05-223   SOLSTICE    FULLTIME TO DAY-ONLY
75951   208/0412   05-225   MPS         VT LEVEL 5
75951   208/0412   05-224   HALOE       POWER OFF
75956   208/1212   05-226   MPS         VT LEVEL 6


                              APPENDIX B
                  OUT-OF-LIMITS & ALERTS OCCURRENCES
                       Week ending 29 July 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 29 July 2005

                     CLOCK DRIFT RATE ADJUSTMENTS

ORBIT          TIME                   CLOCK RATE CHANGE
-----          -----                  -----------------
75901          204/2101               CLK ADJ FR 20.6 TO 0.0 MSEC/DAY


                              APPENDIX D
                     UARS BATTERY PERFORMANCE DATA
                       Week ending 29 July 2005

     22 July 2005 - GMT Day 203 Beta = 35.6 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     67.2/  39.2    -2.42/-3.68    +00.0/+00.0   05.8     0.00       0.0
2     67.2/-100.8   +10.06/+8.73    +31.6/-20.8   25.8     1.04      24.2
3    156.8/-700.0    +4.50/+3.55    +19.2/-11.6   25.8     1.05     13.7

     29 July 2005 - GMT Day 209 Beta = 34.0 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       336.0/ 224.0  -2.42/-3.68    +00.0/+00.0   05.4     0.00      0.0
2       -117.6/-268.8 +10.73/+9.72   +28.8/-16.0   26.7     1.09     19.9
3         22.4/-677.6  +4.50/+3.87   +19.2/-10.4   26.7     1.06     13.3


     V/T LEVEL CHANGES
ORB#           AOS TIME   LVL FR-TO
-----          --------   ---------
75951          208/0412   LV6 -> LV5
75956          208/1212   LV5 -> LV6

                              APPENDIX E
                         UARS ANOMALY REPORTS
                       Week ending 29 July 2005

                     NEW ANOMALY REPORTS GENERATED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-032    FOT       75916     205/2056  30832     Generic Late Acquisition
05-032    FOT       75942     207/1326  30832     Generic Late Acquisition

                 ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.    SUBSYS    ORBIT     TIME      CDS       PROBLEM/DATA LOSS
------    ------    -----     ----      ---       -----------------
05-036    FOT       75831     200/0440  N/A       ECLIPSE Command Hung-up
05-037    FOT       75859     202/0216  40172     Late Acq: bad weather @
Guam

                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
------    ------    -----     ----      ---       -----------------
05-032    FOT       See List  July 05   30832     Generic Late Acquisition