This raster function corrects backscatter disturbances caused by thermal noise, resulting in a more seamless synthetic aperture radar (SAR) Sentinel-1 image.
Correcting or removing thermal noise is required to normalize the backscatter signal within the entire SAR image, which is essential to both qualitative and quantitative use of SAR data.
Thermal noise is most obvious in cross-polarization SAR images, such as VH or HV, and in SAR images with low backscatter. For Sentinel-1, thermal noise can appear as interswath discontinuities and is most obvious in scenes spanning the ocean.
The input raster.