For pansharpened imagery, what preprocessing method to do first- is it atmospheric correction or orthorectification? From my readings, it seems the former but the rational polynomial coeeficients or RPCs needed for orthorectification are then removed in the corrected imagery which makes it impossible to do the latter. If the reverse is done with orthorectification first, wavelengths needed for atmospheric correction are removed as well making the latter impossible to accomplish. What gives?
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