As the EM radiation passes through the atmosphere, it undergoes modification in intensity due to atmospheric interaction, viz. selective scattering, absorption and emission. The main objective of atmospheric corrections is to retrieve the realistic surface reflectance or emittance values of a target from remotely sensed image data. In the solar reflection region, atmospheric scattering is the dominant cause of path radiance. In the thermal infrared region, atmospheric window is used to minimize the effect of atmospheric emission. Different types of procedures are used for atmospheric correction that include empirical-statistical procedures and radiative transfer modelling.
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