Feasibility Analysis of Microwave Radar Scheme for Tsunami Fast Warning

Tsunami bring great disasters to human beings. The focus of the research is to predict the feasibility of tsunami early warning by microwave radar scheme. In this article, the electromagnetic (EM) scattering characteristics of the sea surface from the calm sea to the submarine earthquake are studied. Based on the high-order Boussinesq wave model combined with the up and down movement of the two submarine plates, the 3-D geometric propagation model of the tsunami sea surface is established. The geometric structure and propagation characteristics of the sea surface under different earthquake magnitudes are analyzed. The higher the earthquake magnitude, the more obvious the effect on the sea wave height and sea surface slope. Second, the influence of wind velocity disturbance on sea surface roughness caused by tsunami is deduced. The EM scattering distribution of tsunami-affected sea surface is solved by combining the wind disturbance theory with the EM scattering method based on the surface element model. In addition, the distribution of EM scattering coefficients of tsunami sea surface under different radar parameters, background wind speed, and earthquake magnitude are also discussed, providing an important theoretical basis for the rapid warning of tsunami by microwave radar.