Difference Sigma, Gamma and Beta nought?

Microwave Toolbox
1

I know sigma, gamma and beta nought are backscatter coefficient in SAR images but I don’t know about their application and main differences among them.

Could anyone guide me please?

Sincerely,

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Have you seen this topic? Terrain flattering, Sigma0, Beta0 and Gamma0

There is also an explanation here: Radiometric & Geometric Correction Workflow

And one by @peter.meadows: Nominal incidence uncorrected sigma nought

Lastly, there is the radar and SAR glossary by ESA: https://earth.esa.int/handbooks/asar/CNTR5-2.html

Please go through these and feel free to continue here if anything remains unclear.

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Thanks for useful links.

Sincerely,