Radar Cross Section & Swerling Models

Swerling Models
SW0: constant RCS
SW I/II: exp PDF (Rayleigh amp) — many scatterers
SW III/IV: χ² 4-DOF (Rice amp) — one dominant

Slow (I, III): scan-to-scan decorrelation
Fast (II, IV): pulse-to-pulse decorrelation

RCS formulas
Sphere: σ = πa² (optical)
Flat plate: σ = 4πA²/λ²
Corner: σ = 12πa&sup4;/λ²