If you apply Calibration to Sentinel-1 images you get the backscatter coefficient Sigma0.
Please also have a look here: What is sigma0
Maybe this also helps you: Radiometric & Geometric Correction Workflow
If you apply Calibration to Sentinel-1 images you get the backscatter coefficient Sigma0.
Please also have a look here: What is sigma0
Maybe this also helps you: Radiometric & Geometric Correction Workflow