To:sot_shift
from: Dan Schwartz
date: 03 May 00 , 12:00noon EDT
Subject: SOT shift report, Shift L285
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/May_03_2000_L285.txt.

Shift L285. 
	Start at 124:12:00  GMT
		 = 08:00am    03 May EDT
	End	   12:00 noon 03 May
   
SOT Lead	DAS
Spac/Aspect	
FOT/Sci liason	
HRC		
ACIS 		

(Times will be given in GMT on day 124. In general
times are rough, not precise.)

PLAN
Finish running load APR3000E, with OBSID 1708, ACIS-I observation of
three distant clusters of galaxies around CL 0848.6+4453. NOTE:
proprietary rights were waived for this observation! Then start load
MAY0300b, to perform 2.1 ksec TOO observation at 124:21:26 (5:26pm EDT
today), of the black hole candidate XTEJ1550-564, OBSID 680. That will
be followed by CTI measurements surrounding the perigee passage at
2000:125:06:50:44. 


Next Comms:
        124:14:20 to 16:20
        124:22:20 to 00:20
	125:09:15 to 10:45
	125:19:55 to 20:55
	126:06:00 to 07:00
	126:13:00 to 14:00
	127:00:05 to 01:05

EVENTS
Status at LOS, 124:07:19 was as follows:

       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =    132.220 deg 
       DEC                    =     44.936 deg
       ROLL                   =    257.621 deg
       Format                 =          2
       OBSID                  =       1708 (CL 0848.6+4453)

       SIM FA                 =       -535
       SIM TSC                =      92903 (ACIS-I)
       HETG                   =        OUT (80.2 deg)
       LETG                   =        OUT (79.1 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =  0.2720 mu-a
                       B-Leak =  0.0440 mu-a
10:22 AOS
Ron Remillard reports that XTE J1550-564 has been steady at 0.685 Crab
in seven readings over the last 24 hours. Therefore we are good to
proceed with the TOO as planned.

Status at AOS, 24:14:22 was as follows:

       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =    132.219 deg 
       DEC                    =     44.937 deg
       ROLL                   =    257.621 deg
       Format                 =          2
       OBSID                  =       1708 (CL 0848.6+4453)

       SIM FA                 =       -535
       SIM TSC                =      92903 (HRC-S)
       HETG                   =        OUT (80.2 deg)
       LETG                   =        OUT (79.1 deg)
        HRC-S HV is ON 
        EPHIN:         A-Leak =  0.2720 mu-a
                       B-Leak =  0.0440 mu-a
Descending through 120058 km

ACIS focal plane at -119.9 deg C. 

15:34  Abort dump. This is after 3 attempts -- can't get more than
about 20 minutes data without too many errors building up.

15:56 AOS.
	All status essentially unchanged from above reports.

NOTES/ISSUES/PROBLEMS
From 9am status meeting:
	Two loads uplinked covering the revised TOO schedule. Good
until 126:14:30. 
	Products out for MAY0700. Review planned at 2pm today.
	ONLS will be down 5am to 7am Friday for backups and reboot.
	The routine monthly CAP to update ephemeris coefficients is
being prepared. 
	Eric's SOP for ACE rates monitoring has been revised in
response to comments, and will go to Flight Director board
tomorrow. (NOTE: it is therefore not operative at this time.)
	ASVT testing planned for 1 hour at 1pm today. Test patches to
stop bad dump. Test patches to stub and unstub so that they will then be
immediately ready to use for the next safe mode recovery.

Pass was terminated early because of inability to dump the
SSR. Remaining time would not have been useful for this purpose.


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