To:sot_shift
from: Dan Schwartz
date: 14 Dec 99 , 12:00noon EST
Subject: SOT shift report, Shift L144
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_14_1999_L144.txt.

Shift L144. 
	Start at 348:13:00  GMT
		 = 08:00am    14 Dec EST
	End	   12:00 noon 14 Dec
   
SOT Lead	DAS

(Times will be given in GMT on day 348. In general
times are rough, not precise.)

PLAN
Continue running load DEC1299b. Observe TON S180, EUV excess quasar,
with LETG/ACIS-S, OBSID 811. Simultaneous FUSE and other observations
are scheduled.

Next Comms:
        348:15:45 to 17:45
	348:22:00 to 00:00
	349:05:30 to 07:30
	349:15:40 to 19:45
	349:23:00 to 01:00	


EVENTS

Status at LOS, 348:08:59, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =      14.304 deg 
       DEC                    =     -22.373 deg
       ROLL                   =     300.848 deg
       Format                 =          2
       OBSID                  =        811 (TON S180)

       SIM FA                 =      -467
       SIM TSC                =     72440 (ACIS-S)
       HETG                   =        OUT (81.0 deg)
       LETG                   =         IN ( 4.8 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =   0.3800 mu-a
                       B-Leak =   0.0600 mu-a
141893 km, ascending.

15:45  AOS
Status at 348:15:51, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =      14.306 deg 
       DEC                    =     -22.376 deg
       ROLL                   =     300.849 deg
       Format                 =          2
       OBSID                  =        811 (TON S180)

       SIM FA                 =      -467
       SIM TSC                =     72440 (ACIS-S)
       HETG                   =        OUT (81.0 deg)
       LETG                   =         IN ( 4.5 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =   0.3680 mu-a
                       B-Leak =   0.0560 mu-a
143788 km, ascending.

17:15  LOS
Status essentially unchanged from AOS.

NOTES/ISSUES/PROBLEMS
We have reserved 8 hours on Monday, Dec 20, to test the new continuous
dither patch.  However, it is not certain that the products can be
tested and certified for uplink in time.  We would then require heroic
rescheduling efforts to avoid spending 8 hours in idle time.

Last night's SI safing test was completly successful.  (One HRC HV
setting command was not correctly sent, being looked into as a ground
ops problem, but was not part of the safing test per se.) Pending
further analysis today, a report is expected to be generated to
support authorization of loading the same patches into OBC B. A four
hour window is reserved on Wed, Dec 15 15:40 to 19:45 GMT, to test the
ground safing script. This script not completely replaced by SCS 107,
as it might be needed in case of an OBC failure.




-------------------------------------------------------
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 
-------------------------------------------------------