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Surface albedo remote sensing model capable of considering practical skylight distribution influence

A technology of surface albedo and sky light, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of quantitative extraction accuracy and application limitations of surface reflection characteristics

Active Publication Date: 2016-09-28
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide a surface albedo remote sensing model that takes into account the influence of actual sky light distribution to solve the problems of accuracy and application limitations in the quantitative extraction of existing surface reflection characteristics

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  • Surface albedo remote sensing model capable of considering practical skylight distribution influence
  • Surface albedo remote sensing model capable of considering practical skylight distribution influence
  • Surface albedo remote sensing model capable of considering practical skylight distribution influence

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Embodiment Construction

[0036] A surface albedo remote sensing model that takes into account the influence of the actual sky light distribution, observes the remote sensing data of surface targets through multi-angle satellites, and introduces the Ross-Li-Maignan surface reflection model that considers the hot spot effect existing in the remote sensing process, that is, the back reflection peak, abbreviated as RLM model, and obtain the kernel coefficients of the RLM model;

[0037]The values ​​of the surface Lambertian scattering kernel, Ross volume scattering kernel and Li-Sparse reciprocal scattering kernel function are calculated by the solar incident angle and the sensor observation angle, and the surface bidirectional reflectance factor BRF under the condition of any incident angle is calculated by the RLM model, and then the The obtained bidirectional reflection distribution function BRDF, BRDF=π -1 ×BRF, the direct albedo is obtained through the integral operation of the apparent space angle; ...

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Abstract

The invention discloses a surface albedo remote sensing model capable of considering practical skylight distribution influence. In a construction process, skylight angle distribution influence under an atmosphere condition and a multi-reflection mechanism between a surface and atmosphere are considered. A model user needs to carry out inversion on a surface BRDF (Bidirectional Reflectance Distribution Function) model through obtained multi-angle reflectivity data which is about a ground target and is observed by a spatial sensor; a geometric angle relationship between a sun incidence and sensor observation is used for calculating a BRDF model function; through the optical characteristic parameter, which is obtained by field measurement or satellite observation inversion, of atmospheric aerosol and the contents of ingredients including moisture, ozone and the like, surface-air coupling radiation transmission calculation is implemented to obtain input parameters including a diffusion total ratio parameter, a skylight angle distribution function, an atmospheric sphere albedo and the like which are required by the surface albedo remote sensing model in a descending irradiance field, and meanwhile, collineation and diffusion albedo and diffusion albedo under under the skylight angle distribution influence are calculated.

Description

technical field [0001] The invention relates to the field of remote sensing scientific ground surface reflection characteristic extraction and modeling, in particular to a ground surface albedo remote sensing model that takes into account the influence of actual sky light distribution. Background technique [0002] When observing the Earth with space optical loads, the combined effects of the surface and atmosphere must be considered. Because of the anisotropic scattering phase function of key components and particles in the atmosphere, the scattered radiation field in the atmosphere has non-uniform spatial distribution characteristics, that is, the concept of "sky light". On the one hand, surface reflection changes the redistribution of solar incident radiation. Most natural surfaces have obvious directional reflection radiation characteristics, which must be described by the surface bidirectional reflection distribution function BRDF. When observing ground targets at a ce...

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 崔生成朱文越李学彬张梓晗杨世植饶瑞中
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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