Uses an ARD file to set some pixels of a given image to bad

#### Description:

Allows the user to input the name of an NDF image file and and ARD file. The ARD file is used to specify which parts of the image will NOT be used. An output NDF is then created which is the same as the input file except that all pixels specified by the ARD file have been assigned the value Bad.

#### Parameters:

mask in=ic3374 ardfil=^ardfile.txt out=ic3374a