To:sot_shift
from: Dan Schwartz
date: 20 Jul 00, 12:00noon EDT
Subject: SOT shift report 2000-07-20 L363
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Jul_20_2000_L363.txt.

Shift L363. 
	Start at 202:12:00  GMT
		 = 08:00am    20 Jul EDT
	End	   12:00 noon 20 Jul
   
SOT Lead	DAS

(Times will be given in GMT on day 202. In general
times are rough, not precise.)

PLAN
Continue running load JUL1700.  Finish OBSID 1828, ACIS-S/HETG
observation of the SNR N132D. 
Watch ACE proton fluxes closely.
Next Comms
        202:21:00 to 22:00
        203:07:25 to 08:25
        203:15:20 to 16:20
        204:00:10 to 02:10
	204:10:00 to 11:00
	204:17:00 to 18:20
	205:03:00 to 04:00
	205:10:10 to 11:50
	205:19:50 to 21:50 HETG retraction in on-board load.

EVENTS
Status at LOS, 202:10:39, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =     81.323 deg 
       DEC                    =    -69.648 deg
       ROLL                   =    144.235 deg
       Format                 =          2
       OBSID                  =       1828 N132D
       SIM FA                 =       -467
       SIM TSC                =      75623 (ACIS-S)
       HETG                   =         IN ( 6.3 deg)
       LETG                   =        OUT (78.3 deg)
        HRC-I HV is ON 
(NOTE: snapshot and shift report now give EPHIN rates in physical
units, previously was in counts per readout.)
       EPHIN Geom             =       LARG
             E1300            =        0.3           LT 10.0 (RADMON
             P4GM             =        4.1           LT 300. Triggers)
             P41GM            =        0.0           LT 8.47
             A-leak           =     0.6760 mu-a
             B-leak           =     0.1200 mu-a
Ascending through 98126 km. ACIS focal plane temperature -119.9. 
No comm passes during this shift.

NOTES/ISSUES/PROBLEMS 
EPHIN rates continue to decline P4GM is still a factor of > 100 over
its usual rate at ~100,000 km, but another factor of almost 100 below
trigger levels.  ACE 130-214 keV protons are about a factor of 10
higher than yesterday, at ~10,000 per (cm2-s-ster-MeV), and
fluctuating. This would be a concern for ACIS, except that we have the
HETG in place, so the effects are attenuated by an estimated factor of
five.
 

From the 9am status meeting:
	2 supports with 34m, 2 SSR dumps were good.  Last segment of
the JUL1700 load was uplinked, on-board commands are good through
106:05:32 GMT (1:32am EDT on Monday). 
	Load review of JUL2300 was substantially successful. Needed
4 new star catalogs and momentum dumps. New products have been issued
and there will be a load review at 1pm today.
	The 3rd string will be down today, for system maintenance work.
	Analysis of the data processed through the DSN 26m automation
equipment shows some anomalies. E.g., CXC data system operations sees
some non-sensical OBSID changes which last 8 minor frames. GOT has
obtained the data which was recorded in parallel with the old
equipment and is analyzing and comparing.

Quick look data:

OBSID   Target           Time                        Comment
-----   ------           --------------              -------
5	TW Hya		200:10:19    ACIS-S/HETG	Looks good


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