average radar cross section per unit area
Note 1 to entry: If the radar return from the illuminated area is contributed by a number of independent scattering elements, it is described by the backscattering coefficient instead of radar cross section used for the point target. It is calculated as `sigma^0 = sigma/A` Where `sigma` is the total radar cross section of an area `A`. `sigma^0` is a dimesionless parameter and is usually expressed in decibels (dB) as follows: `sigma_(dB)^0 = 10 log_(10) sigma^0`
Note 2 to entry: “Backscattering coefficient” is sometimes called “normalized radar cross section”.
ORIGIN: ISO/TC 211 Glossary of Terms - English (last updated: 2020-06-02)