Function:     irlrs_const

Purpose:      Purpose

Category:     IRAS LRS

File:         filename.c

Author:       P.R. Roelfsema

Description:

      This file contains all LRS instrument specific routines. The
   following  routines are available:

   IRLRS_DETTYPE  - finds out what type a detector is.
   IRLRS_DN2MV    - converts raw data numbers to milli volts.
   IRLRS_PWM2PERMV- converts millivolts to pico Watt per square meter per micron.
   IRLRS_JYPERPWM2- converts pico Watt per square meter to Janskys.
   IRLRS_POS2WAVE - converts inscan position to wavelength.
   IRLRS_LGAIN    - applies in-scan gain correction.
   IRLRS_XGAIN    - applies cross-scan gain correction.
   IRLRS_ADROOP   - applies anti-droop correction.
   IRLRS_COHEN_GAIN - applais Cohen correction factors

Updates:      Sep 19, 1990: PRR, Creation date.
              Nov 27, 1990: PRR, Added many routines.
              Dec 17, 1990: PRR, Added irlrs_adroop.
              Jun 12, 1991: PRR, Change of units: Wm-2mu-2 -> Jy and v.v.
              Jul 22, 1991: PRR, Added Cohen gain factors
	                         Added max xgain correction.