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Chlorophyll concentration vertical profile inversion method of satellite-borne single-photon laser radar

A technology of chlorophyll concentration and laser radar, which is applied in the field of laser remote sensing, can solve the problems of inability to record signal size, after-pulse effect, etc.

Active Publication Date: 2022-05-17
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] The invention discloses a vertical profile inversion method of chlorophyll concentration of space-borne single-photon laser radar to solve the problems in the prior art that the single-photon laser radar cannot record the signal size and the residual pulse effect affects the result

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  • Chlorophyll concentration vertical profile inversion method of satellite-borne single-photon laser radar
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  • Chlorophyll concentration vertical profile inversion method of satellite-borne single-photon laser radar

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[0046] Below in conjunction with specific embodiment the present invention is described in further detail:

[0047] The steps of the present invention are as figure 1 , taking the photon point cloud data and system hardware parameters acquired by the US ICESat-2 (Ice, Cloud, and land Elevation Satellite-2) single-photon lidar as an example. ICESat-2 is the world's first satellite equipped with a single-photon laser radar system. It carries a single-photon laser radar named ATLAS (Advanced Topographic Laser Altimeter System), which is equipped with three strong beams and weak beams in the direction perpendicular to the satellite orbit. Six topographic profiles can be constructed with a vertical accuracy of tens of centimeters. At the same time, the footprint size of the single-photon lidar point cloud, the point cloud density in the along-track direction (along the satellite flight direction) and vertical track direction (perpendicular to the satellite flight direction) are g...

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Abstract

The invention discloses a chlorophyll concentration vertical section inversion method of a satellite-borne single-photon laser radar, belongs to the technical field of laser remote sensing, and is used for acquiring vertical sections of seawater parameters and chlorophyll parameters. Separating and extracting the water surface signal photon point cloud and the water body back scattering signal photon point cloud obtained by the satellite-borne single-photon laser radar; correcting the influence of the residual pulse effect of the single-photon laser radar on the photon signal by using an RL deconvolution algorithm; constructing a probability statistical model of spaceborne single-photon laser radar water surface reflection signal photons and water body back scattering signal photons, and calculating a laser radar system constant by using wind speed data; and constructing a spectrum empirical analysis model, and calculating the vertical section of the chlorophyll of the water body. Compared with the prior art, the method can accurately invert the water chlorophyll vertical section result of the to-be-detected water area, and has important significance in multiple fields of monitoring water pollution, algae outbreak, ocean carbon cycle, global climate change and the like.

Description

technical field [0001] The invention discloses an inversion method for a vertical section of chlorophyll concentration of a spaceborne single-photon laser radar, belonging to the technical field of laser remote sensing. Background technique [0002] When the traditional space-borne linear system lidar is used to detect chlorophyll in water bodies, it mainly processes the lidar echo waveform data reflected and scattered by marine targets; compared with the traditional linear system lidar, the sensitivity of the single-photon lidar detector has increased by 2-3 An order of magnitude has significantly improved its vertical resolution and detection efficiency. It is possible to obtain weak underwater backscatter signals through satellite platforms, and then obtain vertical profiles of seawater parameters and chlorophyll parameters. However, the new generation of single-photon laser radar does not have the function of waveform recording. It can only record the presence or absence...

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Application Information

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IPC IPC(8): G01N21/49G01N21/25G01S7/48G06F17/18
CPCG01N21/49G01N21/25G01S7/4802G06F17/18G01N2021/4709
Inventor 马跃郑慧莹张智宇宿殿鹏阳凡林黄珏刘振卜宪海崔晓东
Owner SHANDONG UNIV OF SCI & TECH
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