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Wave water surface sky diffuse reflection light polarization field simulation method

A simulation method and light polarization technology, applied in the field of optical remote sensing, can solve the problems of lack of scientific description of wave conditions

Inactive Publication Date: 2014-07-23
BEIHANG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

At present, the existing research at home and abroad only stays in the polarization mode of the sky diffuse reflection light on the still water surface, and lacks a scientific description of the wave situation

Method used

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  • Wave water surface sky diffuse reflection light polarization field simulation method
  • Wave water surface sky diffuse reflection light polarization field simulation method
  • Wave water surface sky diffuse reflection light polarization field simulation method

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Embodiment Construction

[0060] In order to better illustrate the simulation method of the wave water surface sky diffuse light polarization field that the present invention relates to, utilize the model of the present invention to carry out test and verification, obtain good effect, concrete implementation method is as follows:

[0061] (1) Establish a celestial coordinate system describing the polarization field of sky light. In this coordinate system, mark the coordinate origin O, the position of the sun point S, the position of the sky observation point P, the meridian circle where the sky observation point is located, the meridian circle where the sun point is located, and the Point P, the E vector perpendicular to the scattering surface;

[0062] (2) Set the position of the sun point and the position of the observation point in the celestial coordinate system, which are described by the solar zenith angle, solar azimuth angle, observation zenith angle and observation azimuth angle;

[0063] (3) ...

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Abstract

The invention relates to a wave water surface sky diffuse reflection light polarization field simulation method. The method has the following steps: a celestial coordinate system describing a sky light polarization field is established; sun point location and observation point location are designed in the celestial coordinate system; a sky light scattering angle is calculated in spherical geometry; degree of polarization of sky light at any point is calculated according to a semi-analytical Rayleigh scattering model; a polarization angle of sky light is calculated according to the sun point location and sky observation point coordinates via a vector mode; the polarized reflectance and the degree of polarization of wave water surface sky diffused light are calculated; and the polarization angle of water surface reflected sky light is obtained according to information of sky light degree of polarization in combination with an STOKES vector and a trigonometric function relationship so that calculation of the polarization state of water surface reflected sky light is realized. Sky light can be incident at any polarization state, and the polarization state of the reflected light of a static water surface and the wave water surface can be realized so that polarization characteristics of a natural water surface can be really described.

Description

(1) Technical field [0001] The invention relates to a method for simulating the polarized field of light diffusely reflected in the sky on a wavy water surface, belongs to the field of optical remote sensing, and is of great significance in the research of water color remote sensing technology, the application of polarization remote sensing and the research of aquatic ecology. (2) Background technology [0002] In nature, the water surface is a natural polarizer. The process of water surface reflection significantly changes the polarization state of the sun's incident light and the sky's diffuse light. In the field of remote sensing applications, the geometric structure characteristics and roughness information of the wave surface can be inferred through the polarization state of the reflected light received by the water surface sensor. In addition, the detection and identification of water surface targets can also be carried out according to the difference of polarization ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J4/02
Inventor 周冠华赵慧洁邢健徐武健牛春跃
Owner BEIHANG UNIV
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