Help for SEBASSCAL

PURPOSE:

   SEBASSCAL is a program which calibrates SEBASS data to ground radiance,
ground temperature, or brightness temperature. The input is SEBASS data which
have already been calibrated to instrument radiance (in mW/m^2...).
Output is a band interleaved by line (BIL) data set of all bands in two 
byte integer.

EXECUTION:

   The following is the execution statement format for SEBASSCAL:

	SEBASSCAL INP=PIX OUT=CALPIX PARAMS

   where INP, OUT, and PARAMS are parameters discussed in their res-
pective parameter sections. 



OPERATION:

   SEBASSCAL takes as input the radiance at sensor dataset of SEBASS data.
It uses MODTRAN to compute the atmospheric path radiance, transmittance, 
and ground reflected atmospheric radiance. The formula used to compute
ground radiance is:

        IRAD = [GRAD + (1.0-e)*L   ]*Trans + L
                                sky           path

   The units output for radiance images are in milliwatts/m**2/um/sr. The units 
output for temperature images are in hundredths of degrees Celsius.
Output is in halfword (two byte signed integer) format. 


WRITTEN BY:  Ron Alley April 29, 1997

COGNIZANT PROGRAMMER:  Ron Alley

REVISION: New

PARAMETERS:

INP

Radiance at sensor SEBASS image

OUT

Output data set of of calibrated SEBASS data.

SIZE

The standard VICAR2 output size field.

SL

Starting line

SS

Starting sample

NL

Number of lines

NS

Number of samples

CALMODE

This keyword selects the type of decalibatrion to be performed Valid: GRAD, GTEM, BTEM

DATE

Date of data acquisition as yyyymmdd

AMODEL

Selects the model for which the atmospheric corrections will be performed via MODTRAN

ATEMP

Selects atmospheric temperature and pressure profiles, if different form that defaulted with AMODEL.

AHUMID

Selects the atmospheric water vapor model, if different from that defaulted with AMODEL.

AOZONE

Selects the ozone model, if different from that defaulted with AMODEL.

HEIGHT

Aircraft altitude (km above MSL)

DATUM

Surface elevation (km above MSL)

NLAYERS

The number of atmospheric lay- ers in the radiosonde data (if used).

ALTITUDE

The altitudes of each of the atmospheric layers given in the radiosonde data. (km.)

PRESSURE

The atmospheric pressures of each of the atmospheric lay- ers given in the radiosonde data. (mb.)

TEMP

The temperatures of the at- mospheric layers given in the radiosonde data. Units are either Celsius (the default) or Kelvin, if the KELVIN keyword has been specified.