Transparency of natural waters is an important hydro-optical parameter denoting their bioproductivity and eco-logical status. A number of optically active components and processes both below the water surface and on it control the absorption and scattering of optical radiation. In practice water turbidity can be described by its dif-fuse attenuation coefficient. Restoring the latter by the shape of lidar returns (i. e. time dependence of the inten-sity of scattered radiation) is obscured by the need to account a number of factors, both internal and external. To approximate the return shape by functions derived from optical assumptions, cumbersome computations are re-quired. The paper deals with an experience of approximating lidar returns with a piecewise asymmetric Gaussian function. The process of numerical simulation is described along with the dependencies of the function’s parame-ters on the diffuse attenuation coefficient value.

Authors: V. S. Goryainov, A. A. Buznikov, V. I. Chernook

Direction: Instrument Engineering and Information-Measurement Technologies

Keywords: Lidars, remote sensing of water, signal processing

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