Function:     irlrs_pwm2permv

Purpose:      converts millivolts to pico Watt per square meter per micron.

Category:     IRAS LRS

File:         irlrs_const.c

Author:       P.R. Roelfsema

Use:          REAL IRLRS_PWM2PERMV( DETNO )   Input   integer

              IRLRS_PWM2PERMV - returns scale factor in 10^-12 Wm^-2mu^-2/mV 
                                which can be used to convert LRS data from 
                                detector DETNO from mV to Wm-2mu-2.
                                For in-valid DETNO 0.0 is returned.
              DETNO           - detector number. Valid LRS detectors are
                                71, 72, 73 short wavelength and 74 and 75
                                long wavelength detectors.

Updates:      Nov 27, 1990: PRR, Creation date