PROCEDURE: 22s

TITLE: SBC tip/tilt sweep

CATEGORY: Verification

PURPOSE: Obtain high quality PSF images from the SBC, determine best M1
tip/tilt position.

FREQUENCY: Run before and after Thermal Vacuum campaign.  If possible
run for several field positions.

DETECTOR: SBC

PREREQUISITES: 
     1. RAS/CAL setup and aligned.
     2. Calibration delivery system aligned to RAS/CAL.
     3. N_2 purge environment in place for both the instrument and
        RAS/CAL. 
     4. SBC safe-open done with RAS/CAL D2 lamp.  
     5. RAS/CAL D2 lamp intensity/ND level adjusted to produce peak
        count rate of 30 to 50 counts/sec/pixel
     6. Focus position at nominal HRC focus, or best SBC focus if
        already determined.

HARDWARE REQUIREMENTS: 
     1. RAS/CAL
     2. D2 Lamp

SOFTWARE REQUIREMENTS: IDL tip/tilt sweep analysis software,
		       IDL phase retrieval software.

COMMAND MODE: SMS  (JGCS02A1.SMS)

PROCEDURE/EXPOSURES:  
  --  RAS/CAL D2 lamp on (adjusted to level noted above), F15OLP selected
  --  Here d-in is the position of the M1 inner cylinder wrt to the 
      start of the procedure, d-out is the position of the M1 outer 
      cylinder wrt to the start of the procedure. In  both cases the
      positionn is given in motor steps. 
  --  The remaining steps are specified in the SMS JGCS02A1.SMS
   1  150s external  d-in=-3, d-out=-3
   2  150s external  d-in=-3, d-out=-3
   3  150s external  d-in=0,  d-out=-3
   4  150s external  d-in=0,  d-out=-3
   5  150s external  d-in=3,  d-out=-3
   6  150s external  d-in=3,  d-out=-3
   7  150s external  d-in=-3, d-out=0
   8  150s external  d-in=-3, d-out=0
   9  150s external  d-in=0,  d-out=0
  10  150s external  d-in=0,  d-out=0
  11  150s external  d-in=3,  d-out=0
  12  150s external  d-in=3,  d-out=0
  13  150s external  d-in=-3, d-out=3
  14  150s external  d-in=-3, d-out=3
  15  150s external  d-in=0,  d-out=3
  16  150s external  d-in=0,  d-out=3
  17  150s external  d-in=3,  d-out=3
  18  150s external  d-in=3,  d-out=3
  19  150s external  d-in=0,  d-out=0
  20  150s external  d-in=0,  d-out=0

VARIANTS: 

TOTAL EXPOSURES: 20

TOTAL TIME: ~1.7 hours: 
   (Note: - this is the time needed to run the SMS.  The prerequisites
    may require much more time to accomplish [see proc_21s.txt].
    However, since proc_21s [focus sweep] will be run first, no
    additional setup time will be needed.)


ANALYSIS: