Spatially smooth a data cube using the specified METHOD.
InCube is an existing 2-D or 3-D data file or SIC Variable. OutCube is data filename or SIC Variable. If OutCube is a filename, the file is created. If OutCube is an existing SIC Variable, it must match the InCube sizes. If OutCube is a non-existing SIC variable name, it is automatically created with the proper sizes.
Available methods are GAUSS, KERNEL or NOISE. See further subtopics for details.