Impact of clutter spectra on radar performance prediction

The effect on radar detection of the shape of the Doppler spectrum of windb lown vegetated ground clutter is analyzed. An extensive experimental campai gn carried out by MIT Lincoln Laboratory showed the shape of the windblown clutter Doppler spectrum to be exponential, in contrast to two other widely -used spectral models (i.e., Gaussian and power-law). The detection perform ance of two classes of surveillance radar, ground-based and Airborne Early Warning, is evaluated and compared against windblown ground clutter using t he three above-mentioned Doppler spectral shapes. The analysis is first don e with closed-form equations, and subsequently validated using a set of mea sured clutter data. It is demonstrated that the exponentially shaped Dopple r spectrum should be used as the reference to model windblown ground clutte r for the prediction of radar detection performance.