Validation of an automated algorithm for the retrieval of snow covered area and snow grain size from imaging spectrometer data

摘要

We describe here the validation of an automated algorithm for the retrieval of sub-pixel snow convered area and grain size from Airborne Visible Infrared Imagign Spectrometer (AVIRIS) data. The algorithm consists of a multiple endmember spectral mixture analysis with a spectral library of snow spectral endmembers of varying grain size derived from a radiative transfer model and vegetation, rock, and other endmembers collected in the field and laboratory.