The strength feature and the cause of sea clutter under different atmosphere duct

This paper simulated and analyzed the atmospheric refraction environment on Dartmouth Canada in 1993. Two data files with different strength duct are used to analyze sea clutter strength feature. Moreover, the mechanism of sea clutter is discussed through the ray tracing and the propagation loss. The main results and contributions are as following: (1) The experiments on Dartmouth exits evaporation duct were made; (2) That sea clutter strength in the stronger duct is larger than that in the weaker duct is obtained; (3) It is found that the electromagnetic wave ray propagate farther, the propagation loss are smaller in the stronger duct environment, which are the causes of sea clutter strength feature.