Hello ,
I Am working with GRD product , when I apply radiometric calibration I get some pixels
superior then 1 , according to knowledge the sigma values should be between 0 and and 1.
think of double bounce or dihedreal reflectors where the signal potentially returns to the sensor multiple times.
In extreme cases, the signal even is even received from neighboring pixels:
Image source
The “knowledge” is wrong. There is no reason why sigma0 cannot be larger than one. It’s just a logarithmic conversion.