To:sot_shift
from: Dan Schwartz
date: 13 Dec 99 , 12:00noon EST
Subject: SOT shift report, Shift L143
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_13_1999_L143.txt.

Shift L143. 
	Start at 347:13:00  GMT
		 = 08:00am    13 Dec EST
	End	   12:00 noon 13 Dec
   
SOT Lead	DAS

(Times will be given in GMT on day 347. In general
times are rough, not precise.)

PLAN
Continue running load DEC1299b. Emerge from belts and perform ACIS
CTI measurements. SI safing test will start at 19:20

Next Comms:
	347:13:30 to 15:50
	347:19:00 to 01:25
	348:07:15 to 09:00
	348:15:45 to 17:45

EVENTS

Status at LOS, 347:07:59, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          0 
       RA                     =     350.685 deg 
       DEC                    =      59.201 deg
       ROLL                   =     281.470 deg
       Format                 =          2
       OBSID                  =      62273 (ACIS CTI)

       SIM FA                 =      -990
       SIM TSC                =    -99616 (HRC-S)
       HETG                   =        OUT (80.6 deg)
       LETG                   =        OUT (79.1 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =   0.4400 mu-a
                       B-Leak =   0.0680 mu-a

13:56  AOS

Status at AOS, 347:14:26, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          0 
       RA                     =     350.683 deg 
       DEC                    =      59.201 deg
       ROLL                   =     281.472 deg
       Format                 =          2
       OBSID                  =      62273 (ACIS CTI)

       SIM FA                 =      -990
       SIM TSC                =    -99616 (HRC-S)
       HETG                   =        OUT (80.6 deg)
       LETG                   =        OUT (79.1 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =   0.4560 mu-a
                       B-Leak =   0.0680 mu-a

LOS 347:15:49
Status at LOS, 347:15:45, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          0 
       RA                     =     350.686 deg 
       DEC                    =      59.185 deg
       ROLL                   =     281.469 deg
       Format                 =          2
       OBSID                  =      62272 (ACIS CTI)

       SIM FA                 =      -990
       SIM TSC                =    -99616 (HRC-S)
       HETG                   =        OUT (80.6 deg)
       LETG                   =        OUT (79.1 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =   0.4480 mu-a
                       B-Leak =   0.0680 mu-a
   
NOTES/ISSUES/PROBLEMS
For the SI safing tests this afternoon, we will disable MTAPRS, the
monitoring pages. 
Safing tests have a one hour margin even in the contingency that we 
must load the backout patches.   

As reported in the 9:00 a.m. meeting, the OCs noticed yesterday that the
ACA lost track of the FID in image slot #0 during observation #300.
Back orbit data show that the loss of the FID corresponded to the Image
#0 defective pixel flag going from OK -> ERR at 346:06:31 GMT.

Quick look data:
	HRC-I OBSIDs 1502, 1503, 1504 of AR Lac all show significant
off-axis image distortion, as should be expected.  HRC 1497 of AR LAC
shows usual tail. Following ACIS observations look good:
850 of the BAL 0256-0119
802 of NGS 7618
305 of M31
550 of A2261.


-------------------------------------------------------
Dan Schwartz,	MS #3
das@head-cfa.harvard.edu  
phone: (617)495-7232    FAX:   (617)495-7356
cell phone: (617)512-5627   
pager: 800-759-8352 PIN 1636502
       or e-mail 1636502@skytel.com 
-------------------------------------------------------