I am new in remote sensing field.I sometimes got confused when I read about image pre-processing.Can someone please elaborate to me the difference and some example methods to do radiometric correction and radiometric calibration ? Is converting DN values to Top Of Atmospheric (TOA) reflectance values from 2 sets of images (e.g Landsat 7) from different time counted as correcting or calibrating ?Are DOS (Dark Object Subtraction) and Sun-angle correction parts of radiometric correction ?
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