Help for MINMAP

MINMAP is a procedure designed to find the depth and wavelength-
positon of the minimum feature in TIMS emissivity spectra. This
is accomplished by fitting a simple, 3-parameter Gaussian function
to the emissivity spectrum at every pixel. 

The output of this procedure is a 3-band image in REAL format. The
The first band of the contains the depth of the emissivity minimum,
which is an approximation of the minimum emissivity in the spectrum.
The second band contains the wavelength-position of the minimum, given
in micrometers. Note that this value may not correspond to the central
wavelength of any TIMS channel. The third band contains the area enclosed
by the Gaussian function, again given in units of micrometers (recall that
emissivity has no units).
The input to MINMAP can be any six-band image file that contains estimates
of emissivity, and is in HALFWORD format. The default input consists of
emissivity estimates that have been multiplied by 10,000 (as produced by
the MODEL EMITTANCE and BBFIT options in TIMSEMIS), but the user can 
specify any scaling factor between 1 and 32,000. Regardless of the scaling
factor, the minimum emissivity estimate at a pixel CANNOT BE LESS THAN ZERO. 
The output values for the minimum emissivity will always range between 
zero and one.