To:sot_shift
from: Dan Schwartz
date: 19 Jun 03, 12:00noon EDT
Subject: SOT shift report 2003-06-19 L1428
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Jun_19_2003_L1428.txt.

Shift L1428. 
	Start at 170:13:00  GMT
		 = 08:00am    19 Jun EDT
	End	   12:00 noon 19 Jun
   
SOT Lead	DAS
(Times will be given in GMT on day 170.)

PLAN
----
Continue running load JUN1603C. Finish obsid 4398, a 115ks ACIS-S/LETG
observation to study absorption features in the neutron star 1E 1207.4-5209. 

Next Comms:
 170:2215 to 2315 
 171:0430 to 0530 
 171:0955 to 1155 
 171:2010 to 2210 
 172:0200 to 0400 
 172:0915 to 1115
 172:2100 to 2200 
 173:0545 to 0645 
 173:1220 to 1420 
 173:2120 to 2220

Orbital events:
 2003:170:08:51:49.536    534       EAPOGEE       ORBIT APOGEE 
 2003:171:16:35:40.389    534       EPERIGEE      ORBIT PERIGEE
 2003:173:00:19:52.134    535       EAPOGEE       ORBIT APOGEE 
 2003:174:08:03:53.709    535       EPERIGEE      ORBIT PERIGEE
 2003:175:15:48:13.446    536       EAPOGEE       ORBIT APOGEE 
 2003:176:23:32:52.194    536       EPERIGEE      ORBIT PERIGEE
 2003:178:07:16:56.162    537       EAPOGEE       ORBIT APOGEE 
 2003:179:15:02:09.967    537       EPERIGEE      ORBIT PERIGEE
 2003:180:22:45:43.478    538       EAPOGEE       ORBIT APOGEE 

EVENTS
------
Status at AOS, 170:12:22, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5 
       FIDS                   =          3
       RA                     =    182.491 deg 
       Dec                    =    -52.404 deg
       ROLL                   =    257.990 deg
       Format                 =          2
       OBSID                  =       4398 1E 1207.4-5209 
       SIM FA                 =       -467
       SIM TSC                =      72439 (ACIS-S)
       DITHER		      =	      ENAB 
       HETG                   =        OUT (79.46 deg)
       LETG                   =         IN ( 4.09 deg)
        HRC-I HV is ON 
       EPHIN Geom             =       LARG
	     E150	      =	    1287.8
	     E300	      =	      11.0
             E1300            =        0.1           LT 10.0 (RADMON
             P4GM             =       45.9           LT 300. Triggers)
             P41GM            =        0.0           LT 8.47
             A-leak           =     1.0200 mu-a
             B-leak           =     0.8760 mu-a
Gyro 1 Curr 1 139.20
Gyro 1 Curr 2 100.80
Descending through 129562 km. ACIS focal plane temperature -119.7. 

14:20 AOS expected. Status is essentially unchanged. Electron EPHIN
rates are about 3 times lower, and gyro A1 current down to 134ma. 
	

NOTES/ISSUES/PROBLEMS
Gyro A1 current has jumped up to ~140ma. 

From the 9am status meeting:
     Three 34m supports. Intermittent problems on primary system at DSS-24
led to a swap to backup equipment, but 1st 2.5 hours of data were
missed. Data being recovered in the current contact. One SCS loaded, on-board
loads good until 174:01:05.
      June 2303B loads were approved and signed.
      ACA yellow warnings for primary mirror temperature. Due to
increased TEC power for the cooler focal plane. Will review and revise
limits.
      Gyro A1 current has suddenly jumped to ~140ma, and become
noisy. There will be a 2pm telecon to the IRU situation, including 
swap to B side, a report on the B-side calibration, and the derived 
rate sun mode.
     ASVT testing of safe mode recovery with the new gyro procedure will
take place tomorrow.
     On-line system 3.9.3 installation is proceeding on schedule or 
slightly ahead. Today will configure 3rd string so that it will be 
a backup for ops readiness during the switch. 

Quick look data:
OBSID   Target           Time                        Comment
-----   ------           --------------              -------
No new quick looks, partial data in on   1E 1207.4-5209


-------------------------------------------------------
Dan Schwartz,	MS #3
das@head-cfa.harvard.edu  
phone: (617)495-7232    FAX:   (617)495-7356
cell phone: (617)512-5627   
pager: 877-693-7198 PIN 693-7198
       or e-mail 6937198@archwireless.net
-------------------------------------------------------