Generation of amplitude image from ASAR and PALSAR data

Data acquired by the air-borne and space-borne SAR sensors contain uncertainties due to variations in altitude, velocity of the sensor platform, relief displacement and non-linearties in sweep of a sensor’s instantaneous field of view (IFOV). The datasets need to be properly calibrated/preprocessed to use it for desired applications. Preprocessing of the SAR data includes conversion from slant range to ground range, radiometric calibration, speckle suppression and SAR image geocoding.