Hi all, I want to calculate intensity value (in dB unit) of both ERS and ASAR images, currently I use the workflow of 1. Apply orbit file 2. Calibration (to dB) 3. Speckle filtering 4. Range-Doppler terrain correction. Is this suitable for these two sensors? or did I miss other corrections?
Also, compared to Sentinel-1, a much higher noise level can be seen in these images. Therefore, the boundary between land and sea is not clear. I wonder is there any suggestion for reducing the noisy level or enhancing the land/sea intensity difference?