Sounding laser full waveform data-based diffuse attenuation coefficient extraction method and system

A technology of attenuation coefficient and extraction method, which is applied in the field of laser communication, can solve the problems of inability to measure, inconvenient water body environmental quality evaluation, water body ecological restoration, low measurement accuracy and resolution, etc.

Active Publication Date: 2017-06-06
SHENZHEN UNIV
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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for extracting the diffuse attenuation coefficient based on the full waveform data of the depth-sounding laser, aiming at solving the problem of the calculation method of the diffuse at

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  • Sounding laser full waveform data-based diffuse attenuation coefficient extraction method and system
  • Sounding laser full waveform data-based diffuse attenuation coefficient extraction method and system
  • Sounding laser full waveform data-based diffuse attenuation coefficient extraction method and system

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[0044] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] The present invention also provides a flow chart of a preferred embodiment of a method for extracting diffuse attenuation coefficients based on full waveform data of depth-sounding lasers, as shown in figure 1 As shown, the method includes the steps of:

[0046] S100. Obtain full waveform data in the sounding laser data, and filter effective laser sounding points from the full waveform data.

[0047] Specifically, the airborne laser sounding system is used to obtain the sounding laser data. The airborne laser sounding system has the characteristics of high precision, high resolution, flexibility, fast efficiency and full coverage. The va...

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Abstract

The invention discloses a sounding laser full-waveform data-based diffuse attenuation coefficient extraction method and system. The method comprises the following steps: filtering to obtain effective laser sounding points from full-waveform data in sounding laser data; extracting emission intensity and echo intensity of each effective laser sounding point obtained by filtering from the full-waveform data, and after extracting the echo intensity, generating a water body back scattering function corresponding to a water body back scattering waveform according to an algorithm; selecting a plurality of time point pairs with a preset time interval from the water body back scattering function corresponding a single laser sounding point, and calculating an initial diffuse attenuation coefficient of each time point pair; taking an average value of the initial diffuse attenuation coefficients of all the time point pairs as a final diffuse attenuation coefficient of the laser sounding points. According to the invention, the diffuse attenuation coefficient value can be calculated by using the full-waveform data of the single sounding points, and echo intensity information and a depth value of each sounding point do not need to be acquired, the calculation accuracy of the diffuse attenuation coefficient is high.

Description

technical field [0001] The invention relates to the technical field of laser communication, in particular to a method and system for extracting diffuse attenuation coefficients based on full waveform data of depth-sounding lasers. Background technique [0002] Diffuse attenuation coefficient is the inherent optical property of water body, which reflects the change and distribution of light in water body, and directly affects the transparency of water body and the depth of euphotic layer. Studying the characteristics of the diffuse attenuation coefficient can better understand the optical properties and optical types of water bodies, analyze water quality, aquatic organisms, hydrological elements and water chemical properties, as well as ocean heat exchange, phytoplankton photosynthesis, etc., for the environmental quality evaluation and Provide basic data for ecological restoration of water body environment. [0003] Since the transmission of natural light in water is a com...

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Application Information

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IPC IPC(8): G01N21/49
CPCG01N21/4738G01N21/49
Inventor 李清泉丁凯朱家松汪驰升王丹崔扬
Owner SHENZHEN UNIV
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