Level 2 Help for ASTGRAD

Input dataset containing ASTER 1B TIR radiance at sensor data, in units of
milliWatts per square meter per steradian per micrometer.

Output dataset containing ASTER 1B TIR upwelling radiance at surface data,
in units of milliWatts per square meter per steradian per micrometer.

The standard Vicar size field ( starting_line, starting_sample, 
number_of_lines, number_of_samples).

The values of TRANS should be the tranmittance from the surface to top of
atmosphere.  5 values must be provided, one for each ASTER TIR channel.

The values of PATHRAD are the amounts of path emitted radiance observed at
the top of atmosphere, when viewing nadir.  The required units are 
milliWatts per square meter per steradian per micrometer.