Patent ID: 8159388
Filing Date: 2012-04-17
Classification: G01S

Abstract:
1. A method implemented in a radar system for filtering sea clutter from an echo issued from the radar system on board a moving platform resulting in the surveillance of targets using a hydro graphic model describing long waves, comprising the following steps: determining parameter values of the hydrographic model using radar echo from the radar system; estimating sea clutter corresponding to a sea surface as deduced from the hydrographic model to produce an estimated sea clutter; and filtering the estimated sea clutter from the radar echo, wherein the hydrographic model describes long waves only, and wherein the long waves are a sum of sinusoidal components, the sinusoidal components of long waves being described through a dispersion relation that relates a wavenumber and a wavefrequency to a wave direction, a sea depth, a sea current and a radar platform velocity.