Theoretical analysis of the first-order sea clutter in shipborne high-frequency surface wave radar
To analyze the characteristic and space-time distribution of the first-order sea clutter in shipborne high-frequency surface wave radar (HFSWR) with six degree-of-freedom (DOF) motion, a time-varying array steering vector in pulse domain is presented. The sea clutter spectrum and space-time distribution model can be derived by the classical space-time cascaded processing of the received echo signal. Simulations are carried out under given motion and radar parameters. Results show that both forward movement and six DOF motion have important influences on the first-order sea clutter, which may bring significant implication in future investigation for moving target detection and ocean remote sensing.