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Correcting method for remote sensing reflectivity of vertical inhomogeneous alga water

A technology of remote sensing reflectance and correction method, which is applied in the field of remote sensing reflectance correction, can solve problems such as increasing the difficulty of research, and achieve the effect of eliminating the influence of spectral shape and size, improving accuracy and accurate acquisition.

Active Publication Date: 2017-08-04
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

Therefore, when studying the vertical distribution of algae, how to control the two variables of suspended matter and CDOM also increases the difficulty of research

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  • Correcting method for remote sensing reflectivity of vertical inhomogeneous alga water
  • Correcting method for remote sensing reflectivity of vertical inhomogeneous alga water
  • Correcting method for remote sensing reflectivity of vertical inhomogeneous alga water

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[0066] In order to better understand the technical content of the present invention, specific embodiments are given together with the attached drawings for description as follows.

[0067] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily defined to include all aspects of the present invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of numerous ways, since the concepts and embodiments disclosed herein are not limited to any implementation. In addition, some aspects of the present disclosure may be used alone or in any suitable combination with other aspects of the present disclosure.

[0068] In this embodiment, based on the measured hyperspectral data, the remote sensing reflectance of the algae vert...

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Abstract

The invention relates to a correcting method for a remote sensing reflectivity of vertical inhomogeneous alga water. The method comprises the following steps: calculating the remote sensing reflectivity under the vertical inhomogeneous condition of different alga vertical direction patterns and a corresponding relative error Delta Rrs of the remote sensing reflectivity under the vertical homogeneous condition; establishing a remote sensing reflectivity correcting algorithm for the vertical inhomogeneous alga water according to a relation between the Delta Rrs and the structure parameters of different alga vertical direction patterns; regarding the remote sensing reflectivity of vertical inhomogeneous alga water as the remote sensing reflectivity of vertical homogeneous water. The traditional lake water color remote sensing is established on the basis of the assumption of vertical homogeneous water, but under a practical condition, the change in the vertical direction of the alga in eutrophic lake is large. According to the method provided by the invention, the influence of the vertical inhomogeneous alga water on the application precision of the traditional lake water color remote sensing algorithm can be reduced and the water remote sensing reflectivity under the vertical homogeneous alga distribution condition and the normalized equivalent condition can be acquired.

Description

technical field [0001] The invention relates to a remote sensing reflectance correction method for algae vertical non-uniform water body. Background technique [0002] The phytoplankton in my country's inland lakes mainly include: Diatoms, Chlorophyta, Cyanophyta, Cryptophyta, Chrysophyta, Euglenophyta, Dinophyta and Xanthophyta (Yu Tao, 2010). Each type of algae has its own requirements for the living environment. For eutrophic lakes (such as Chaohu Lake, Taihu Lake, etc.), the phytoplankton in the water body are mainly Cyanophyta, Chlorophyta and Diatoms, usually more than 90%, especially in summer, they are basically Cyanophyta (Cheng Fang ,2010; Jiang Xia et al., 2010). The movement forms of algae in water mainly include suspension, floating and swimming. The algae of Chlorophyta and Diatoms in Chaohu Lake and Taihu Lake in my country mainly exist in suspended form, and the change of their spatial position depends entirely on hydrodynamic conditions (Hu Hongjun and We...

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Application Information

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IPC IPC(8): G01N21/55
CPCG01N21/55G01N2021/1793
Inventor 薛坤马荣华段洪涛张玉超
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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