What is radar "three-body scattering"?

Three-body scattering phenomenon, referred to as "TBSS", refers to the abnormal echo formed due to the forward scattering of radar energy in areas with strong reflectivity factors. The picture often appears like an elongated nail-like shape from a strong reflectivity factor. The echo zone extends radially. Its radial velocity is very small and its spectral width is very large. TBSS is an indicative indicator for detecting large hail. It has been widely used in its indicative role in detecting hail.