This program will spectrally resample an image. A common use is to correct for spectral smile. The pixels of each spectrum must be spatially aligned (i.e., The pixel at (sample, line, band) (1,1,1) represents the same point on the target body as (1,1,2), and (1,1,3), .... and so on for all spectra in the image.) For instruments where the spectra are not spatially aligned, the ISIS program cam2map can be used to project the cube.

The program requires two spectral definition files as input. See the parameters SMILEDEF and OBJECTIVE for specifics. SMILEDEF is used to define the wavelength and filter width of each element in the sensor. OBJECTIVE is used to define the wavelength and filter width of the pixels in the output cube.

Spectral definitions can have multiple sections. Each section represents the wavelength and filter width of a subset of bands. For example: a 256 band image may have two sections, where the first 200 entries define the wavelength centers and filter widths for 2.489 to 1.2204 um, and the last 56 entries define the wavelength centers and filter widths for 2.2623 to 2.0898 um. Each section is defined by a reversal of the wavelength center values (i.e., 2.2, 2.3, 2.20, 2.25, 2.30 would define two sections with two entries in the first and three in the second). The input and output spectral definitions must have the same number of sections, and should contain wavelengths in the same range. Spectral resampling will not cross section boundaries.

WARNING: This program is computationally intense and may take a long time to process large cubes.