During dealing with the SAR image, what is the relationship between dielectric constant and reflectivity for SAR? is there some equation to explain their relationship?
I can highly recommend a book by Ulaby and Long 'Microwave Radar and Radiometric Remote Sensing', where you can find the relationship between dielectric constant and reflectivity for SAR.
More information about the book you can find using the link provided below.
They provided also some Matlab codes to calculate this relation as well as an online tool for that (see the second link).
I hope this will help you.
http://mrs.eecs.umich.edu/
http://mrs.eecs.umich.edu/codes/Module2_3/Module2_3.html
Its simple, go throgh fresnels equations.
You will get reflectivity if you know absolute dielectric constant
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