Water optical parameter inversion method of satellite-borne single-photon laser radar

Abstract

The invention relates to a water optical parameter inversion method for a satellite-borne single-photon laser radar, and belongs to the technical field of laser remote sensing. The method comprises the steps of firstly, extracting an effective signal when the satellite-borne single-photon laser radar flies above a water surface and carries out measurement, and eliminating a residual pulse effect of the single-photon laser radar through a deconvolution algorithm; establishing a water body backscattering theoretical model, calculating a water body backscattering coefficient and a diffusion attenuation coefficient by using a least square fitting method and the obtained water body backscattering laser pulse point cloud after the residual pulse effect is eliminated, and calculating a water body backscattering coefficient according to a water body parameter backscattering model. According to the invention, the main optical parameters of a seawater subsurface layer of ta local water body can be quickly and accurately calculated through the point cloud data obtained when the satellite-borne single-photon laser radar flies over the ocean, which plays an important role in effectively monitoring the water body pollution, water body eutrophication, water quality decline and the like.

Description

technical field [0001] The invention belongs to the technical field of laser remote sensing, and in particular relates to a water body optical parameter inversion method of a spaceborne single-photon laser radar. Background technique [0002] For the study of the ocean subsurface, the in-situ measurement of the ship-borne method and the buoy method can provide high-precision results, but it is expensive, the detection efficiency is low, and it is difficult to cover a large area; the space-borne passive optical remote sensing method is limited by the sun. Radiation and satellite orbit constraints make it difficult to work at high latitudes and do not provide effective vertical profile distribution. Active detection lidar remote sensing benefits from the active emission of laser pulses and can work around the clock. Spaceborne lidar has the advantages of wide coverage and other advantages, and has gradually become a reliable tool for research. The limit detection capability a...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a water body optical parameter inversion method for spaceborne single-photon lidar, to solve the problem in the prior art that the water body optical parameter inversion method for linear system laser radar is not suitable for single-photon system

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