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Airborne marine laser radar signal processing method based on iterative Klett

A laser radar and signal processing technology, applied in the field of laser radar detection, can solve problems such as low feasibility, and achieve the effect of high accuracy and small error

Active Publication Date: 2020-01-10
SECOND INST OF OCEANOGRAPHY MNR
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Problems solved by technology

[0004] The backscattering extinction logarithmic ratio k is related to the laser wavelength and the optical characteristics of seawater. At present, the various characteristics of seawater are not well understood, so the feasibility of determining the k value by this method is low

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  • Airborne marine laser radar signal processing method based on iterative Klett
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  • Airborne marine laser radar signal processing method based on iterative Klett

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[0034] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after reading the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

[0035] Compared with conventional seawater optical parameter detection methods, extracting the attenuation coefficient and backscatter coefficient of water body from the lidar echo signal, and finding a fast and accurate inversion method is an important goal of ocean detection lidar research. At present, the commonly used algorithm for inverting ocean attenuation coefficients using lidar echo signals is the Coliis method. The Coliis method is simple and convenient, ...

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Abstract

The invention discloses an airborne marine laser radar signal processing method based on an iterative Klett. The method comprises the steps of processing a laser radar echo signal subjected to background noise removal and distance correction by using the Klett method, and obtaining different radar attenuation coefficients by setting different backscattering extinction logarithmic ratio k; substituting collected chlorophyll profile data into a bio-optical model to obtain the seawater attenuation coefficient; and comparing and analyzing an attenuation coefficient obtained by the bio-optical model at the same observation point and a radar attenuation coefficient obtained by inversion of laser radar, determining the seawater back scattering extinction logarithmic ratio k to further obtain a more accurate seawater attenuation coefficient. By adopting the method disclosed by the invention, the accuracy degree of the seawater attenuation coefficient profile obtained by inversion of laser radar can be improved.

Description

technical field [0001] The invention belongs to the technical field of laser radar detection, in particular to an iterative Klett-based airborne marine laser radar signal processing method. Background technique [0002] The detection of ocean optical parameters is of great significance to the research fields of ocean hydrological exploration, underwater communication, ocean environment monitoring and ocean laser remote sensing. Common detection methods include: on-site in-situ measurement, sonar, passive remote sensing and active remote sensing. On-site in-situ measurement has high accuracy, but it is time-consuming, expensive and labor-intensive; sonar has good transmission performance underwater, but because of the high reflectivity of the water vapor interface, it cannot be placed on other platforms such as ships or aircraft; passive remote sensing can Achieving global large-scale real-time observation, but only sea surface information can be obtained, and ocean profile ...

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Application Information

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IPC IPC(8): G01S7/48G01S17/88
CPCG01S7/4802G01S17/88
Inventor 陈鹏毛志华刘航朱乾坤黄海清龚芳
Owner SECOND INST OF OCEANOGRAPHY MNR
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