Sep_29_1999_H69.txt Shift H69
        Start at 1999:273:06:30:00 GMT
                = 1999 Sep 30  2:30am EDT
        End       1999 Sep 30  8:00am EDT

   
SOT Lead	Bill Podgorski
SOT SC/ACA	
FOT-SI		
HRC-SI          
ACIS-SI		
OTHER           Wallace Jackson

Plan: - Running P19d load 
      - Perform ACIS CTI measurements (translate SIM to HRC-S)
      - Radiation zone entry: 1999:273:06:00:10.960, ELECTRON1 RADIATION ENTRY0 
                              1999:273:06:44:10.960, PROTON1 RADIATION 3ENTRY0   
      - Radiation zone exit:  1999:273:14:46:10.960, PROTON1 RADIATION EXIT0  
                              1999:273:15:20:10.960, ELECTRON2 RADIATION EXIT0      
      - Eclipse 1999:273:08:01 - 1999:09:10:51
      - COMM: 273:0540 - 273:1010 (DSS-27)
              273:1800 - 273:2000 (DSS-61)
              274:0040 - 274:0300 (DSS-27)


EVENTS							    DONE	OBSID
--------------						    ----	-----
Start Shift                                             273:0630        62372
----- Real time------ DSS-27 (Goldstone)
Chandra State at start of shift
   (see note 2)
Terminate maneuver to Eclipse Attitude                  273:0653
Batteries commanded on line for eclipse                 273:0801
Lose SUN                                                273:0803
Regain SUN                                              273:0909
   (see note 3 on eclipse performance)
LOS                                                     273:1010
End of shift                                            273:1200


NOTES/ISSUES/PROBLEMS 
--------------------- 

1) It has been decided (ref: 9/29 ACIS telecon) to have both gratings
   RETRACTED during rad zone passages, HRC-S at focus with door 
   cracked open. The grating configuration was not implemented for
   this pass (HETG IN), but MP should plan to retract gratings
   in future rad zone passes (along with moving to HRC-S and closing
   HRC door to cracked posn).
  

2) Chandra was maneuvering to the eclipse attitude at shift start. 
   At the start of the maneuver the attitude was (for OBS 120):

       RA                     =   16.0       deg
       DEC                    =  -72.032222  deg
       ROLL                   =   11.7875    deg
  
   At the end of the maneuver a successful transition to Normal Pointing Mode
   was made with the following state:

       PCAD MODE              =       NPNT
       Stars:                 =          4  
       FIDS                   =          0 
       RA                     = 112.120044   deg
       DEC                    =  80.290018   deg
       ROLL                   =  73.803145   deg
       Format                 =          2
       OBSID                  =      62372
       SIM FA                 =       -467
       SIM TSC                =     -99616 (HRC-S)
       HETGA                  =       7.83 (IN)
       HETGB                  =       6.71 (IN)
       LETGA                  =      81.71 (OUT)
       LETGB                  =      79.83 (OUT)

       ACIS                   =  All vid boards OFF
       HRC                    =  All HV OFF

3) Eclipse performance was again nominal, with a  max bus voltage 
   reached during recovery of 33.2 volts.