Inversion Technology Research Of The Marine Radar Image For Wave Elevation

Ocean accounts for the vast majority of the Earth's surface area,which has extremely rich resources.It plays an important role for the development of human beings to learn more about waves in detail comprehensively.Wave is an important natural phenomenon,when human beings are engaged in ship transportation,maritime military activities,navigation tours and other activities,it requires real-time acquisition of marine radar image data and real-time inversion calculation of ocean wave parameters using the relevant algorithms.The wave elevation is very important for the research of independent wave and the prediction of wave stability.Based on the research project of "ocean wave monitoring equipment",this paper studies the elevation algorithm of X-band navigation radar image.This paper briefly introduces the current research situation of inversion wave elevation algorithm based on X-band radar image at home and abroad,analyzes the basic principle of inversion of wave elevation algorithm,and analyzes the basic parameters and imaging mechanism of radar in the process of inversion wave elevation algorithm,Radar image processing method,buoy system and other related theories and equipment were described,focusing on the inversion of the basic process of wave elevation,the use of buoy data to verify the elevation results,the use of elevation research and other key issues in-depth study.At present,there are three methods for measuring sea surface elevation: inverse Fourier transform,independent wave component summation,empirical inversion.In view of the lack of relevant research results in the country,this paper introduces Nieto's anti-Fourier transform method proposed in 2004 to obtain the wave elevation.The method is based on the theory of linear wave,assuming that the shadow modulation is the main modulation mechanism,and it assumes that the sea elevation is linearly superimposed by multiple independently propagating sine waves.In this paper,the three-dimensional image spectrum acquisition,the design of the band-pass filter,the reconstruction of the sea level and the key steps of the calibration of the sea surface are analyzed in depth.A set of radar original image sequences is taken as an example.Inversion,the feasibility of the method is proved.In order to verify the accuracy and reliability of the algorithm,this paper takes a large amount of data to carry out the inversion of the wave elevation based on the national defense key scientific research project.As the specific buoy position can not be obtained,first take measures to obtain the buoy position,then use the buoy result and the measured elevation for comparative analysis.Aiming at the premise that the wave elevation algorithm needs to be carried out under the long wave wave,this paper proposes a method to judge the long peak wave and put forward a quality control factor to improve the quality of the experiment.In order to apply the wave elevation in more fields,this paper discusses the application of the wave elevation in the study of the wave characteristics,which mainly focuses on the characteristics of the single wave and the wave group characteristics.The basic concepts and analysis methods were introduced,the results show that the wave elevation in scientific research and engineering applications also has considerable scientific research and commercial value.