Nov_24_1999_M124.txt Shift M124
        Start at 1999:328:20:00:00 GMT
                = 1999 Nov 24  3:00pm EST
        End       1999 Nov 24  6:30pm EST

   
See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or 
/proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Nov_24_1999_M124.txt.



SOT Lead	Bill Podgorski
SOT SC/ACA	
FOT-SI		
HRC-SI          
ACIS-SI	        Paul Plucinsky
OTHER          

Plan: - Running P27b, in radiation zone
 

EVENTS							    DONE	OBSID
--------------						    ----	-----
Start Shift (Out of contact)                            328:2000        62300
AOS DSS-54 (Madrid)
At AOS Chandra's state was as expected                  328:2110        62300
Losing stars occasionally                               328:2200
   in slots 2 & 3 (no FIDS now)
LOS                                                     328:2240
End of shift                                            328:2300





NOTES/ISSUES/PROBLEMS 
--------------------- 
1) Chandra's state at AOS 328:2110 was:

       PCAD MODE              =       NPNT
       CONTROL LAW FLAG       =       NPNT
       Stars:                 =          5
       FIDS                   =          0
       RA                     =  25.002141 deg
       DEC                    = -44.998421 deg
       ROLL                   = -33.991246 deg
       Format                 =          2
       OBSID                  =      62300
       SIM FA                 =       -467 
       SIM TSC                =     -99616 (HRC-S)
       HETGA                  =      80.96 deg (OUT)
       HETGB                  =      81.33 deg (OUT)
       LETGA                  =      80.21 deg (OUT)
       LETGB                  =      79.08 deg (OUT)
       EPHIN A-leak           =     0.0000
             B-leak           =     0.2560

       ACIS                   =     Not running science
       HRC                    =     All HV is OFF

2) Load P27c will start running at 329:2200 in place of place of P27b. 
   This is to allow long duration ACIS FEP0 testing with ACIS in MIL mode.

3) We have been noticing that two of the stars used as guide stars have been
   dropping out occasionally. They are the two dimmest stars. It appears that
   there is a warm pixel (amplitude about 100) near each of them (slots 2 & 3)
   which may be the cause of the problem. Cosmic ray hits are another possibility.
   I have given the some data to Tom and Rob to analyze.