Multi Scale Analysis And Visualization Of Gravity Field

At present,the submarine underwater operations using the navigation system is the Passive Inertial Navigation System.Because the system components of system error accumulation can't long time underwater operations.Relevant experts and scholars put forward using gravity matching aided Inertial navigation technology,this technology is the basis of multi-scale analysis of gravity field and its visualization.Gravity field of the multi-scale analysis technology can carry on the multi-scale analysis to the basic data of gravity field of the gravity data of different scales,one can meet the demand of different gravity matching accuracy,and can satisfy for gravity field visualization process according to different resolutions close to the distance;Gravity field on 3 d visualization can be intuitive performance data of gravity field can be implemented,and to query and display the location of the underwater vehicle.This article is a multi-scale analysis of gravitational field and its 3 d visualization of two goals for correlation analysis research.Which takes advantage of the fractal theory,M-band wavelet analysis and WebGL three-dimensional visualization technology.The main research results are as follows:(1)Using M-band wavelet analysis to realize the transformation of the scale of the basic data of gravity field.Based on M-band characteristics of wavelet multi-scale analysis,on the scale of basic data of gravity field and push down.M-band wavelet decomposition to decompose the basic data of gravity field,the output is low frequency part and high frequency part,the output of the low frequency part of good to keep the basic characteristic of the source data,and resolution to 1 / M times,so the output of the low frequency part as a result of gravity field scale push.On the contrary,the low resolution data M-band wavelet reconstruction,the low resolution data as input through wavelet reconstruction of low frequency part can be input data resolution for M times the size of the input data,and can through the wavelet reconstruction after wavelet decomposition of the low resolution data before recovery for the decomposition of theinput data.(2)Data of gravity field with fractal theory quantitatively determine the optimal expression of moderation.Gravitational field in the process of rendering 3 d and efficiently,there is a guarantee of gravity data characteristic information of lowest resolution,namely the optimal scale of three-dimensional expression.Study the fractal characteristics of gravity field three-dimensional curved surface,using fractal dimension to describe the information content of gravity field surface,the resolution of the gravity field surface and the relationship between the fractal dimension,gravity field surface determined to keep the information expression of an optimal scale.(3)Using WebGL technology to build a three-dimensional expression of regional gravity field three-dimensional display system.Based on WebGL to construct 3 d visualization system has a cross-platform features,3 d visualization of the gravity field data,intuitively show the three dimensional gravity field,and realize the function of basic human interaction.