Scattering Cross-Section of Sea Targets in Nonhomogeneous Incident Field

An approach to calculation and measurement tasks for scattering cross-section of sea targets observed at grazing angles to the sea surface is suggested. The method is based on a multibeam model of radiowave propagation and scattering at sea targets. An analytical expression has been obtained for propagation factor in the line-of-sight range. Diagrams are presented illustrating the dependence of propagation factor as a function of sea roughness, observation angle and range. Effects of increased backscattering from targets and ships are discussed.