To:sot_shift
from: Dan Schwartz
date: 15 Sep 05, 12:00noon EDT
Subject: SOT shift report 2005-09-15 L2247
--------
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/web-cxc/htdocs/acis/SOT_reports/Sep_15_2005_L2247.txt.

Shift L2247. 
	Start at 258:13:00  GMT
		 = 08:00am    15 Sep EDT
	End	   10:00am    15 Sep
   
SOT Lead	DAS
(Times will be given in GMT on day 258.)

PLAN
----
We are shut down by an autonomous SCS 107 run at ~257:01:06, due to
high E130 rates. 

Next Comms:
258:1240 to 1440
258:2040 to 2240
259:0345 to 0445
259:1650 to 1850
259:2245 to 2345
260:0245 to 0345

Orbital events:
2005:257:18:15:16.047    843  EPERIGEE  ORBIT PERIGEE
2005:259:02:00:04.378    844  EAPOGEE   ORBIT APOGEE
2005:260:09:43:05.542    844  EPERIGEE  ORBIT PERIGEE
2005:261:17:28:01.102    845  EAPOGEE   ORBIT APOGEE
2005:263:01:11:49.149    845  EPERIGEE  ORBIT PERIGEE
2005:264:08:55:58.113    846  EAPOGEE   ORBIT APOGEE
2005:265:16:40:20.574    846  EPERIGEE  ORBIT PERIGEE

EVENTS
------
Status at AOS, 258:13:23, was as follows:
       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          8 
       FIDS                   =          0
       RA                     =    340.997 deg 
       Dec                    =     24.001 deg
       ROLL                   =    205.061 deg
       Format                 =          2
       OBSID                  =      59452 cool attitude for ephin
       SIM FA                 =       -467
       SIM TSC                =     -99616 (HRC-S)
       DITHER		      =	      ENAB 
       HETG                   =        OUT (79.09 deg)
       LETG                   =        OUT (77.59 deg)
        HRC-S HV is ON 
       EPHIN Geom             =       LARG
	     E150	      =	    2279.0
	     E300	      =	      66.0
             E1300            =        2.0           LT 10.0 (RADMON
             P4GM             =      211.4           LT 300. Disabled)
             P41GM            =        0.3           LT 8.47
             A-leak           =     1.0200 mu-a
             B-leak           =     0.7800 mu-a
Ascending through 111744 km. ACIS focal plane temperature -119.7 degC.  
EPH temp     81.31 degF

NOTES/ISSUES/PROBLEMS
From the 9am status meeting:
Two supports in the past 24 hours. No issues. Current support is
delayed in establishing comm. Delay was about 40 minutes.
The maneuver only load SEP1505A was reviewed, approved, uplinked and
executed yesterday, to get us to a more favorable EPHIN temperature
for restarting the observing program. CAP 839A was run to disable 
SCS 29. 

Radiation telecon:
Held at 10:15am EDT. Will proceed with restarting observing program at
258:21:50, with the SEP1505B products, to be uplinked at the 20:40GMT
pass this afternoon.  Will have a GO/NOGO radiation telecon convening
at 20:30, 4:30pm EDT, to look at the EPHIN data from the pass.
(Note that the SEP1505B products are not a revision of the SEP1505A,
but rather run in continuity to SEP1505A!)

Splinter meeting on EPHIN temperatures:
We looked at some EPHIN temperatures during 4 recent Groth strip
observations. They fluctuated 2 or 3 degrees about the prediction, but
based on the data it seemed that IF we started below 80 degrees coming
out of perigee, we could schedule observations upwards of 50 ks and if
the predicted temperature did not exceed 100 degF we could have a good
expectation that the rail voltage would not trip. Tan will document
the thermal data, and Ken will formulate guidelines for waiving the 96
degF limit in such cases based on the data experience.


Quick look data:
OBSID   Target           Time                        Comment
-----   ------           --------------              -------
No new data due to radiation shutdown.


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