Aug_29_1999_H39.txt Shift H39 
        Start at 1999:242:02:00 GMT = 1999 Aug 29 10:00pm EDT
        End                           1999 Aug 30 06:00am EDT

See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Aug_29_1999_H39.txt.
   
SOT Lead	Ed Kellogg
SOT SC/ACA	
FOT-SI		
HRC-SI		
ACIS-SI		Scott Koch	

(Times: hhmm or ddd:hhmm, not precise.)

Plan: complete CAP 341, doing steps 8-12, retract HETG under hardware
control, and insert/retract under software control. Then go on to
3C295 observation.

EVENTS							PLAN	DONE	OBSID
--------------						----	----	-----
AOS Goldstone	day 242					0210	0212	1199
Uplink p9 load							0218
ACIS science events begin					0227
Complete hardware HETG grating retraction, 8M014.11		0245
CAP 350 to position -504					0330
Retract HETG under hardware control				0413
ACIS stop science					0456	0456
Start p9 load, Change OBSID				0500	0500	0578
LOS until 1320							0620

NOTES/ISSUES/PROBLEMS 
--------------------- 
At start of shift, we were LOS.

0228 Vacuum is 3.3e-6 torr.

At AOS ACIS was doing a bias map, so we did not start the grating
retraction until that was done, so we could see ACIS events.

We did CAP 350 to put us at best focus(-505,0), after the HETG grating
hardware retraction 8M014.10, instead of at step 3 of SAP para
8M014.9.

At 8M014.12, INSERT HETG USING SOFTWARE COMMANDS, we found the "HETG
Insert" Mission SCS to slot #247 was faulty, with commands in reverse
order. HETG was re-inserted by hardware command, while we attempted to
diagnose the SCS problem. This was confounded by lots of TLM hits,
which slowed the operation down. By 0400 it was clear that there would
not be time to complete 8M014 to do software insertion and retraction
on this DSN contact. We retracted HETG under hardware control, and
prepared for the initiation of the new daily load, p9, which begins
at 0500.

It will be necessary to diagnose & repair SCS #247, and reschedule
INSERT HETG USING SOFTWARE COMMANDS in the next few days.