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Method for inversely analyzing transparency of water body by virtue of inherent optical parameter

A technology of water transparency and optical parameters, applied in the field of water color remote sensing, can solve the problems of lack of universality, achieve universal applicability and solve the problem of time and space constraints

Inactive Publication Date: 2016-10-26
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Problems solved by technology

However, although the accuracy of the empirical algorithm is high, it is limited by time and space and has no universality.

Method used

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  • Method for inversely analyzing transparency of water body by virtue of inherent optical parameter
  • Method for inversely analyzing transparency of water body by virtue of inherent optical parameter
  • Method for inversely analyzing transparency of water body by virtue of inherent optical parameter

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Embodiment Construction

[0016] The method for retrieving the transparency of water bodies using inherent optical parameters of the present invention will be further described in detail through examples below.

[0017] A method for retrieving the transparency of water bodies using inherent optical parameters, the specific implementation steps are as follows:

[0018] (1) Reading in measured transparency data and remote sensing reflectance data

[0019] The transparency data of 62 stations collected in May and June 2009 in the Yellow East China Sea and the MODIS-Aqua level 3 remote sensing albedo data in the same period were read in.

[0020] (2) Calculation of absorption and scattering coefficients by remote sensing reflectance

[0021] Studies by Doron et al. showed that K d (v)+c(v) and K d (490)+c(490) is highly correlated, and the relationship between the two can be fitted by a quadratic polynomial. The coefficient of determination of the model is as high as 0.99, as shown in the following form...

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Abstract

The invention belongs to the technical field of water color remote sensing, and relates to a method for inversely analyzing the transparency of a water body by virtue of an inherent optical parameter. The method for inversely analyzing the transparency of the water body by virtue of the inherent optical parameter comprises the following steps: (1) reading data of measured transparency and data of remote sensing reflectance; (2) calculating an absorption and scattering coefficient through the remote sensing reflectance; (3) constructing an algorithm for inversely analyzing the transparency of the water body by virtue of the inherent optical parameter; (4) calculating an error between an inverse analysis value and a measured value to estimate the accuracy of the algorithm by taking the measured transparency as a true value. Compared with the prior art, the method for inversely analyzing the transparency of the water body by virtue of the inherent optical parameter has the advantages that the inherent optical parameter of the water body can be estimated according to the remote sensing reflectance to further inversely analyze the transparency of the water body, so that the problem of time-space limits of a case-two water body color constituent inverse analysis algorithm is solved, and universal applicability is achieved.

Description

technical field [0001] The invention belongs to the technical field of water color remote sensing, and relates to a method for retrieving water body transparency by using inherent optical parameters. Background technique [0002] At present, there are mainly empirical methods and semi-analytical algorithms for retrieving water transparency using remote sensing technology. An empirical approach is by building statistical regression models between remote sensing data and real-time or near-real-time ground-truth measurements of transparency. Commonly used methods include single-band algorithm, band ratio algorithm, multi-band algorithm and spectral differential method. The advantage of this method is that it is easy to use and has high estimation accuracy, but the optical characteristics of the second-class water body are complex and changeable, with strong regional and seasonal characteristics. Therefore, empirical algorithms are subject to regional and time constraints, and...

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Application Information

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IPC IPC(8): G01N21/55G01N21/49G01N21/31G01N21/17
CPCG01N21/55G01N21/17G01N21/31G01N21/49G01N2021/1725G01N2021/174
Inventor 禹定峰周燕刘恩晓解维浩盖颖颖李恒
Owner OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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