Aug_01_1999_B.txt Shift B10. 

SOT Lead	Ed Kellogg
SpcCraft/Aspect	Mark Freeman
FOT/Sci liason	Andy Northrup
HRC		Ralph Kraft
ACIS 		Yousaf Butt

(Times will be given in GMT on day 213-14. not precise.)


EVENTS							PLAN	DONE	OBSID
--------------						----	----	-----
Start shift (9:19am EDT 01 Aug 1999)			1319	1319	62740
ACIS internal calibration				ongo		-62739
CAP 135 looking at SIM flexure heating			ongo	
Continue monitoring ACA fidlites			ongo
CAP 129 to re-acquire fidlites					1535
Finish ACIS internal calib				1700	1708
SAP 61077 ACIS 3x3 test					1700	1745	62737,6
CAP 129 to re-acquire fidlites					2002
Reconfigure Valve Drive Electronics A->B		2300
RCS & MUPS thruster checkout				2400	
End shift (9:19pm  EDT 01 Aug)		day 214		0119


NOTES/ISSUES/PROBLEMS
---------------------
After IPS-3, apogee = 139,108.3 km, perigee = 3495.5 km, period =
60:00:08 (from shift change briefing).

At start of shift, ACIS was doing an internal calibration, ACA was
monitoring fidlites for flexure heating test, HRC was off and nominal,
EPHIN was nominal.

It was decided to use the other two 'B' engines for IPS-4, because of
loss of RTDs (resistive temperature device). This means
significant CAPs to reconfigure. The plan is to have the patches
developed on the ASVT, and loaded on Chandra. 

The Diego pass, 1435-1600, did not work out well. There were many
dropouts.

The CAP 129 at 1535 resulted in not acquiring any fidlites - too much
stray light.

We will not use obsid 62738; early termination of ACIS calib.

CAP 129 at 2002, first try gave 4 fidlites, but one in a background monitor
location. After two more full field searches, same result. Then when
we sent the command to enable the monitoring windows, as expected the
fidlite in a monitoring window was lost, so we remain with three
lites. We should emphasize that there was no change in procedure from
previous occasions. See flt note 170 by Mark Freeman.