# Radar cross section

From AMS Glossary

## radar cross section

For a scattering object or target at a certain range, the cross-sectional area of an isotropic scatterer at the same range that would return the same power to a radar as the actual target.

The radar cross section σ may be defined by where

*S*_{i}is the power density incident on the target at range*r*and*S*_{r}is the backscattered power density at the receiving antenna.*See*radar equation;*compare*backscattering cross section.