OBJECTIVE FORESTRY

Detailed explanation-1: -FLAASH is a first-principles atmospheric correction tool that corrects wavelengths in the visible through near-infrared and shortwave infrared regions, up to 3 µm. (For thermal regions, use the Toolbox option Radiometric Correction > Thermal Atmospheric Correction.)

Detailed explanation-2: -Thermal Atmospheric Correction. Use Thermal Atmospheric Correction to approximate and remove the atmospheric contributions from thermal infrared radiance data. Thermal image data must be converted to radiance before performing the atmospheric correction.

Detailed explanation-3: -Atmospheric correction mainly consists of two parts: the estimation of atmospheric parameters and the retrieval of surface reflectance. If the surface is Lambertian and all of the atmospheric parameters are known, then remote sensing imagery can be calculated to directly retrieve surface reflectance.