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Modeling method of rough surface microwave band bidirectional reflectance distribution function

A technology of bidirectional reflection distribution and modeling method, which is applied to obtain the data information of the bidirectional reflection distribution function of the rough surface, and the modeling field of the bidirectional reflection distribution function of the rough surface microwave section, which can solve the problem of the bidirectional reflection distribution function of the rough surface in the microwave section. and other problems, to avoid the limitations of measurement conditions, improve limitations, and achieve the effect of high versatility

Inactive Publication Date: 2014-04-02
XIDIAN UNIV
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Problems solved by technology

However, at present, most of the research on the bidirectional reflectance distribution function of rough surfaces and target surfaces at home and abroad is concentrated in the laser and infrared bands, and the research on the bidirectional reflectance distribution function of rough surfaces in the microwave band is relatively rare.

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  • Modeling method of rough surface microwave band bidirectional reflectance distribution function
  • Modeling method of rough surface microwave band bidirectional reflectance distribution function
  • Modeling method of rough surface microwave band bidirectional reflectance distribution function

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with specific embodiments. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not as a limitation to the present invention.

[0035] Such as figure 1 A modeling method for the bidirectional reflectance distribution function in the microwave section of a rough surface is shown, comprising the following steps:

[0036] Step 1: Generate the rough surface model required for modeling

[0037] 1.1) Obtain the rough surface parameters of the simulated ground or sea surface and its power spectral density function S(k) through experiments, wherein the rough surface parameters include root mean square height δ and correlation length l. For different types of rough surfaces, the power spectral density function S(k) has different forms, for example: for the ground power spectral density function is S(k)=2πδexp(-k 2 / δ 2 ) / l 2 , for the sea surface...

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Abstract

The invention discloses a modeling method of rough surface microwave band bidirectional reflectance distribution function. The modeling method comprises the following steps of: generating a rough surface by a Monte Carlo method according to power spectral density function of rough surface; calculating unit radar cross section sigma 0 of the rough surface by a moment method; obtaining a bidirectional reflectance distribution function of the rough surface according to the relation between the rough surface scattering coefficient and the bidirectional reflectance distribution function; modeling a five-parameter empirical model according to the obtained bidirectional reflectance distribution function; selecting optimal standard according to the model parameters, optimizing the parameters of the five-parameter model to obtain empirical parameters; according to the empirical parameters obtained by optimization, modeling a rough surface bidirectional reflectance distribution function through the five-parameter empirical model. Compared with the prior art, the modeling method provided by the invention has the advantages of fast optimization speed, high modeling precision and strong universality, and can be used for study on features of rough surface microwave band bidirectional reflectance distribution function.

Description

technical field [0001] The invention relates to the field of radar technology, and mainly relates to a modeling method of a bidirectional reflection distribution function of a microwave section on a rough surface, which is used for obtaining data information of the bidirectional reflection distribution function of a rough surface. Background technique [0002] With the development of laser guidance, tracking, fuze, electromagnetic wave (light wave) remote sensing and other technologies, more and more attention has been paid to the research on the bidirectional reflection distribution function of various targets and environmental surfaces, and the scattering, radiation and remote sensing in the optical and microwave bands and other fields have been widely used. The modeling method of the bidirectional reflectance distribution function (BRDF) of the microwave region on rough surfaces is of great significance in both theoretical analysis and practical application. [0003] In ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 郭立新苟雪银张连波
Owner XIDIAN UNIV
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