Radar cross section
= Radar cross section
{title2=$\sigma_{\rm back}=4\pi(d\sigma/d\Omega)_{\rm back}$}
The monostatic <radar cross section> is $4\pi$ times the backward <differential scattering cross-section>. Equivalently, $\sigma_{\rm back}=\lim_{r\to\infty}4\pi r^2S_{\rm back}/S_{\rm inc}$. It is a directional scattering measure with dimensions of area, not generally the geometric area or the total <scattering cross-section>. The definition may additionally specify the transmitted and received polarizations.