Level 2 Help for SPECTOXYY

INP = (input1,...,inputN), where the inputs are up to ten 
images in spectral radiance or spectral reflectance.  
The images must have been taken
with different filters and must all be the same size.

Three output images in REAL format representing:
1. x chromaticity
2. y chromaticity
3. Y tristimulus
There is an optional fourth output file containing a 2-d histogram of
the chromaticity space. 

Input image conversion factors for radiance or reflectance.
The input images are multiplied by these factors to convert them into
whatever units the software requires.
For reflectance images the software requires data from 0.0 to 1.0.
For radiance images the software requires data should be in units of 
Watts/meter**2/micron/srteradian and
should be numbers around 200 at 500 nanometers, if at an Earth distance.
CONVERT defaults to 1.0 for all inputs.

Wavelength of the input images in nanometers.
(ie: 556. for example)

Illumination source. Options are: "D65" or "SUN"
D65 represents daylight at average phase angles under the Earth's
atmosphere, including direst sunlight and blue sky scattering.
D65 is normalized to 100 at 560 nm.
SUN represents unfiltered sunlight above the Earth's atmosphere.
Defaults to SUN

Input image data units. Options are: "REFLECT" or "RADIANCE"
Defaults to RADIANCE

Range to the sun in AU.
Defaults to 1
Ignored in reflectance mode.
Used to correct the illuminant ( D65 or SUN but not SOURCE) for the distance
to the sun in radiance mode only.

Illumination source spectrum. One can override the provided  ILLUMIN options
with ones own spectrum. There must be 41 values beginning at 380 nm and 
ending at 780 nm.