UARS Weekly Status Report

23 November 2001




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                UARS WEEKLY STATUS REPORT - 23 Nov 2001

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

SOLSTICE continues normal operations, taking solar data on all available
orbital tracking periods and stellar calibration observations whenever
possible. We continue to gather enough data to meet the SOLSTICE science
objectives during this period of reduced tape recorder operations.

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

SUSIM completed daily mid resolution and MgII solar scans
during periods of predicted UARS telemetry.

We continue work on the remaining software components that will allow
the processing of the SUSIM data from level 1 to level 3 on the SUSIM
RAC.

***********
ACRIM
***********

Nothing received.

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

Nothing received.

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

Nothing received.

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

Nothing received

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

Nothing received.

***********
WINDII
***********

Nothing received.

***********
MPG
***********

The MPG continues to serve as the point-of-contact
for UARS instrument operations to support re-engineering
of the UARS Mission Operations Concept to develop 
capabilities for the Science Traceability Mission.

Daily processing of instrument Daily Activity Plans 
continues with no problems.  

***********
CDHF
***********

Nothing received.
                  
***********
FOT
***********

REPORTING PERIOD

This report covers 10 November 2001 (Orbit 55577, GMT Day 314) through 
16 November 2001 (Orbit 55681, GMT Day 320).

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
	HALOE	317/1248	55629	Power ON
	ACRIM	320/1605	55677	Power OFF - leonids


The beta angle ranged between the angles of 65.2 degrees to 42.8 degrees 
for this report period.  The beta angle is now increasing towards a 
minimum angle of 2 degrees on 26 November 2001 (DOY 330).

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 23.8 V end-of-night (EON) load bus 
voltage.  Battery temperatures are stable with a temperature delta 
between Battery 2 and Battery 3 of 1.0 to 1.3 degrees C.  Additional 
battery performance data for each battery on 09 November 2001 and 16 
November 2001 are provided in Appendix D.

The clock error ranged from -12.5 to 10.4 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.

95	OUT-OF-LIMITS	3D	00
95	ALERTS	3D	00

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

95	FOT	3D	17
95	PEM	3D	1
95	HALO	3D	1
95	ACRIM	3D	1


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

95	FOT	3D	02

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

TRANSPONDER FREQUENCIES:
* Transponder A:  00/316  - 2287.496493
* Transponder B:  01/286  - 2287.498613

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). This service should resume soon.


OTHER SIGNIFICANT EVENTS


UARS SATELLITE OPERATIONS

The FOT and software developers located the cause the problems on the 
new TAC system.  A temporary patch was installed for testing.  Testing 
showed that the patch resolved the urgent DRs.  The TAC developers are 
now in the process of fixing the software permanently and will delivery 
a new release sometime early next week.  This should allow the new TACs 
to go to ORR and subsequently released for operations.



MEETINGS

The FOT attended a UARS Eclipse Meeting on Wednesday, November 15, 2001.
The FOT attended a UARS OBSTF on Wednesday, November 15, 2001.


FUTURE SIGNIFICANT EVENTS


The next UARS Yaw slew is scheduled for 26 November 2001 (DOY 330).  
This maneuver will be a Reverse to Forward Flight maneuver (Southern 
Hemisphere viewing).


Attachments:	Appendix A,	Real-time Commands 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 16 November 2001

ORBIT	AOS	NO.	SUBSYS	REASON
-----	---	---	------	------
55615	316/1324	01-666	OBC	Clk Adj fr 20.6 to 0.00 msec/day
55618	316/1829	01-667	NBTR	NOOPS D-317
55622	317/0120	01-668	PEM	TO DAY ONLY OPS
55626	317/0728	01-667	NBTR	NBTR PBK & RTS-58
55627	317/0809	01-667	NBTR/OBC	NOOPS D-317
55629	317/1248	01-669	HALOE	Power ON
55633	317/1827	01-670	NBTR	NOOPS D-318
55640	318/0544	01-670	NBTR	NBTR PLAYBACK
55642	318/0809	01-670	NBTR/OBC	NOOPS D-318
55645	318/1325	01-670	NBTR	NBTR PLAYBACK
55648	318/1826	01-671	NBTR/OBC	NOOPS D-319
55649	318/2005	01-672	NBTR	NBTR TO REC MODE
55654	319/0402	01-673	OBC/CLK	Clk Adj 0.00 to 20.6 msec/day
55655	319-0544	01-671	NBTR	NBTR PBK & RTS-58
55657	319/0808	01-671	NBTR/OBC	NOOPS D-319
55663	319/1747	01-671	NBTR	NOOPS D-319
55663	319/1825	01-674	NBTR	NOOPS D-320
55670	320/0627	01-674	NBTR	NOOPS D-320
55675	320/1425	01-675	OBC	Clk Adj fr 20.6 to 0.00 msec/day
55677	320/1605	01-676	ACRIM	Power OFF - leonids20
APPENDIX B
OUT-OF-LIMITS & ALERTS OCCURRENCES
Week ending 16 November 2001

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 16 November 2001

CLOCK DRIFT RATE ADJUSTMENTS

ORBIT	TIME	CLOCK RATE CHANGE
-----	-----	-----------------
-None this report period.


APPENDIX D
UARS BATTERY PERFORMANCE DATA
Week ending 16 November 2001


	09 November 2001 - GMT Day 313 Beta 3D -68.0 deg, SA Pos 3D 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	 +16.8/+00.0	-3.68/-4.62	 +0.0/+0.0	13.0	0.000	 0.0
2	 +16.8/-44.8	+5.15/+3.87	+26.8/-15.2	25.1	1.030	20.5
3	 +22.4/-67.2	+4.51/+2.92	+26.4/-15.2	25.1	1.020	20.2


	16 November 2001 - GMT Day 320 Beta 3D 42.8 deg, SA Pos 3D 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	+728.0/+728.0	-3.77/-4.38	 +0.0/ -0.0	10.7	0.000	 0.0
2	 +00.0/ -72.8	+5.47/+4.48	+28.4/-14.4	25.8	1.050	20.4
3	 +22.4/ -22.4	+4.48/+3.17	+27.2/-14.4	25.8	1.040	20.0


	V/T LEVEL CHANGES
ORB#	TIME	LVL FR-TO
-----	----	---------
-no changes	V/T 5







APPENDIX E
UARS ANOMALY REPORTS
Week ending 16 November 2001

NEW ANOMALY REPORTS GENERATED
AR NO.	SUBSYS	ORBIT	TIME	TTR	PROBLEM/DATA LOSS
------	------	-----	----	---	-----------------
01-072	FOT	55654	319/0449	24106	Dropout - NO CARRIER
01-073	FOT	55678	320/1823	N/A	Ops Ctr Late AOS

	ANOMALY CLOSURE INFORMATION RECEIVED
AR NO.	SUBSYS	ORBIT	TIME	TTR	PROBLEM/DATA LOSS
------	------	-----	----	---	-----------------
01-072	FOT	55654	319/0449	24106	Dropout - NO CARRIER
01-073	FOT	55678	320/1823	N/A	Ops Ctr Late AOS

	 ANOMALY INVESTIGATION REPORTS GENERATED
AR NO.	SUBSYS	ORBIT	TIME	TTR	PROBLEM/DATA LOSS
------	------	-----	----	---	-----------------
-None this report period.

OPEN ANOMALY REPORTS
AR NO.	SUBSYS	ORBIT	TIME	TTR	PROBLEM/DATA LOSS
------	------	-----	----	---	-----------------
01-69	FOT	see list	Nov 01	14170	Generic Late Acquisition



		SEVNTFW01/46