What are the requirements for Radar Conversion (Beta Nought)?
Radiometric conversion is possible for detected products only. In a detected product, calibration constants are provided in the header of the original data and the image data was precalibrated by a SAR processor. To perform this type of radiometric conversion, the image you are working with must have calibration information. For RADARSAT-2 data, this includes the following formats:
Possible errors if data requred calibration information is not found :
"ERROR:No valid calibration information found in input image.Either sensor is not supported or calibration node is incomplete.Program is exiting."