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Dual-scale scattering calculation method of ground environment based on ray tracing

A technology of ray tracing and calculation method, which is applied in the direction of calculation, special data processing applications, instruments, etc., can solve the problem of long calculation time, and achieve the effect of improving calculation complexity and accurate modeling

Inactive Publication Date: 2017-01-04
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

However, it directly discretizes the rough surface of the dune into triangular bins, and the subdivision of the rough surface will introduce a large number of bins, which takes a long time to calculate in large-scale calculations such as multi-dune modeling

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  • Dual-scale scattering calculation method of ground environment based on ray tracing
  • Dual-scale scattering calculation method of ground environment based on ray tracing
  • Dual-scale scattering calculation method of ground environment based on ray tracing

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Embodiment Construction

[0040] based on the following Figure 1 to Figure 5 , specifically explain the preferred embodiment of the present invention.

[0041] Such as figure 1 As shown, the present invention provides a method for calculating the double-scale scattering of the ground environment based on ray tracing, comprising the following steps:

[0042] Step S1, constructing a three-dimensional model of the ground environment;

[0043] Step S2. According to the constructed three-dimensional model of the ground environment, the multiple reflections of electromagnetic waves between various parts of the ground environment are simulated by ray tracing;

[0044] Step S3, according to the obtained ray multiple reflection path, solve the ground environment scattering at each intersection point of the path;

[0045] Step S4, performing Monte-Carlo simulation on the ground environment scattering, and using the average of multiple simulations as the final ground environment scattering result.

[0046] I...

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Abstract

Disclosed is a dual-scale scattering calculation method of ground environment based on ray tracing, which adopts regular grid of DEM data to construct a large scale fluctuation property of the ground environment, and uses random rough model to describe statistic characteristics within the grid units. According to the constructed three-dimensional model of the ground environment, the multiple reflections of the ray-tracing simulating electromagnetic wave among various parts of the ground environment and the multiple reflection paths of the obtained rays, the calculation of the scattering of the ground environment can be carried out on every intersection point of the path, And the Monte-Carlo simulation can be carried out on the scattering of the ground environment, finally the average of the several simulations can be used as the final result of the ground environment scattering. The dual-scale scattering calculation of ground environment based on ray tracing avoids increasing the calculation complexity caused by the introduction of a plurality of surface elements during the subdivision of grid units, and through the combination of the ray tracing and IEM, a highly efficient and precise modeling of the ground environment scattering is established.

Description

technical field [0001] The invention relates to the field of ground environment electromagnetic scattering characteristics, in particular to a ray tracing-based calculation method for ground environment double-scale scattering. Background technique [0002] Random rough surfaces can be used to model various natural surfaces, such as ground, sea, desert, and various artificial surfaces. Its scattering model is widely used in ground target recognition, radar remote sensing, and suspicious target detection. The calculation methods of stochastic rough surfaces are mainly divided into numerical methods and analytical methods. Analytical methods have been widely used due to their small computational requirements and large scope of application. Commonly used analytical methods include Kirchhoff approximation (KA), small slope approximation (SSA), perturbation approximation (SPM), integral equation Law (IEM) and so on. With the acquisition and wide application of remote sensing da...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 高鹏程梁子长林云
Owner SHANGHAI RADIO EQUIP RES INST
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