Aug_04_1999_H.txt Shift H14 (A14)
        Start at 1999:217:02:00:00 GMT
                = 1999 Aug 4 10:00pm EDT
        End       1999 Aug 5 6:00am EDT

   
SOT Lead	Ed Kellogg
SpcCraft/Aspect	Tom Aldcroft, Rob Cameron
FOT/Sci liason	Eric Martin
HRC		Adrian Roy
ACIS 		Paul Plucinsky, Mark Bautz

(Times will be given in GMT on day 217. not precise.)


EVENTS							PLAN	DONE	OBSID
--------------						----	----	-----
Start shift (10pm EDT 04 Aug 1999)			0200	0200	62727
Continue monitoring ACA fidlites			ongo
ACIS internal cal					ongo
Start ACA Dark Current calibration			0600	0555	62727
Pitch maneuver to 109.6 degrees complete			0618
Command to start ACA dark current cal sent			0652
Poor TLM quality - dropouts					0705
Start 4th run of ACIS internal cal			0708	0714	62726
Finish first ACA image, replica 0				0720
Send commands for 2nd ACA image					0724
Complete 2nd ACA image						0730
Send commands for 3rd ACA image					0752
Complete 3rd ACA image						0801
Send commands for 4th ACA image					0814
Vac monitor 8.84e-6 torr					0816
Complete 4th ACA image						0827
Reacquire ACA fidlites						0837
Clear SCS 142							0839
End shift (6am EDT 05 Aug)		day 217		1000


NOTES/ISSUES/PROBLEMS
---------------------
At B-to-A shift change, 217:0020, Chandra was nearing apogee, Vac
monitor was 8.58e-6 torr, HRC decided to delay another try at checkout
activities, ACA was monitoring 4 fidlites in correct windows.
As of 217:0521, HRC is off, EPHIN is nominal, and ACIS is doing an
internal cal, which they were doing at the beginning of this H shift.

Discussion about implementing a patch designed to cure the problem of
ACA loss of fidlites. We understand that management is working to make
this happen. Now is a good time to experiment with tracking fidlites,
before the door opens and we must deal with stars as well.

ACA was planned to do a dark current calibration, per CAP 161. Very good data
quality is needed, but not assured. In fact, during the run, lots of
dropouts occurred. The signal-to-noise started at 5 and ended at about 7. 
Dropouts
decreased considerably.

At end of ACA dark current, the fidlites were reacquired successfully.

ACIS plans to run the internal calibration until GMT 1300.