PROCEDURE: 3s

TITLE: Internal calibration lamp flats (SBC)

CATEGORY: Verification

PURPOSE: Test whether calibration lamp + ND filter provides correct
amount of illumination.  

FREQUENCY: Run once at nominal environmental T 

DETECTOR: SBC 

PREREQUISITES: (1) Run unknown light level safe open procedure (#7s) before
running the first time.  (2) Note count rates for each filter during
this.   

HARDWARE REQUIREMENTS: none

SOFTWARE REQUIREMENTS: standard stats analysis tool

COMMAND MODE: PSTOL

PROCEDURE/EXPOSURES:  
	During safe-open procedure note any filters that are likely to
	   over illuminate detector.  Exclude them from the following 
	   exposures.
	Flats need to be of sufficient quality get an overall shape and
           to determine global count rates. 10-20 counts/pixel should be
           sufficient.  Adjust exposure times within a factor of 2 
           if need be.
	1. dark         1000s
        2. F122M        1000s
        3. F165LP       1000s
        4. F150LP        200s
        5. F140LP        200s
        6. F125LP        200s
        7. F115LP        200s
        8. PR130L        200s
        9. PR110L        200s
	10. dark	1000s

VARIANTS:	a- as above

TOTAL EXPOSURES: 10

TOTAL TIME: setup + 10*overhead + 5200s = 1.94: hr
	(setup = 10min, overhead = 2min)

ANALYSIS: 

(1) Subtract scaled dark exposure; Run basic statistical analysis of
image.

(2) Compare count rate to model predictions.

(3) Divide smoothed internal flat by long STUFF flat with same
filter. Ratio gives difference in illumination pattern.