FUNCTION mbe2sec, mbExpLevel 
;	--------------------------------------------------------------
;+	(18-sep-91)
;	Name:
;		mbe2sec	
;	Purpose:
;	 	Convert the mailbox exposure level, mbe, to time in sec.
;	Input:
;		mbExpLevel	mailbox exposure level
;	Output: 
;		Function returns commanded exposure time in sec.
;	History:
;		Written 18-Sep-91: JRL
;-	--------------------------------------------------------------


;  Set up lookup table for mbe values:

        std_exp = [          0.0008, 0.0024, 0.018,  0.028,  0.038 ]
        std_exp = [std_exp,  0.058,  0.078,  0.118,  0.168,  0.238 ]
        std_exp = [std_exp,  0.338,  0.468,  0.668,  0.948,  1.338 ]
        std_exp = [std_exp,  1.888,  2.668,  3.778,  5.338,  7.548 ]
        std_exp = [std_exp, 10.678, 15.108, 21.358, 30.208, 42.718 ]
        std_exp = [std_exp, 60.418, 85.438, 120.828, 170.878 ]
        std_exp = [std_exp, 241.668, -1 ]
        std_exp = [std_exp,  0.25,   0.50,   0.75,   1.00,   1.25, 1.50 ]
        std_exp = [std_exp,  1.75,   2.00,   2.25,   2.50,   2.75, 3.00 ]
        std_exp = [std_exp,  3.25,   3.50,   3.75,   4.00 ]
   
	return,std_exp(mbExplevel)	; Return the exposure time
	end