On the Influence of Spatial Fluctuations of the Water Inherent Optical Properties on the Energy of a Lidar Echo Signal Coming from a Water-Reference-Cited by-同舟云学术

On the Influence of Spatial Fluctuations of the Water Inherent Optical Properties on the Energy of a Lidar Echo Signal Coming from a Water

Published:2023-04-21 Issue:1 Volume:16 Page:35-47
ISSN:2782-5221
Container-title:Fundamental and Applied Hydrophysics
language:
Short-container-title:jour

Author:

Dolin L. S.¹^ORCID

Affiliation:

1. Institute of Applied Physics RAS; Lobachevsky State University of Nizhny Novgorod

Abstract

Theoretical models of the statistical characteristics of the lidar echo signal have been developed to interpret the results of optical sounding of heavily eutrophicated water bodies. Formulas are obtained for calculating the statistically average value and coefficient of variation of the energy of the elastic backscattering signal coming from the near-surface layer of water with randomly inhomogeneous absorption and scattering coefficients. Examples of the dependence of the indicated signal characteristics on the coefficients of variation of the optical characteristics of water are given. It has been established that fluctuations in the absorption coefficient lead to an increase in the average energy of the received signal, and fluctuations in the scattering coefficient to its slight decrease. A significant decrease in the average echo signal energy can be observed with cross-correlated fluctuations in the absorption and scattering coefficients, i. e. in the case when the attenuation coefficient fluctuates at a constant single scattering albedo. Considerations are made on how algorithms for estimating the average values of the optical characteristics of water and the parameters of their inhomogeneities from the average value and the coefficient of variation of the echo signal energy can be constructed.

Publisher

Saint-Petersburg Research Center of the Russian Academy of Science

Subject

Geophysics,Condensed Matter Physics,Water Science and Technology,Oceanography

Reference43 articles.

1. Dolin L.S., Savel’ev V.A. Backscattering signal characteristics at pulse narrow beam illumination of a turbid medium. Izvestiya Academy of Science USSR, Atmospheric and Oceanic Physics. 1971, 7, 5, 505–510 (in Russian).

2. Bravo-Zhivotovsky D.M., Gordeev L.B., Dolin L.S., Mochenev S.B. Determining the absorption and scattering coefficients of sea water by some characteristics of a light field of artificial light sources. Hydrophysical and hydrooptics investigations in the Atlantic and the Pacific Oceans / Ed. By Monin A.S., Shifrin K.S. M., Nauka, 1974, 153–158 (in Russian).

3. Ocean optics / Ed. By Monin A.S. M., Nauka, 1983. Vol. 1. Physical optics of the ocean. 371 p. (in Russian).

4. Billard B., Abbot R.H., Penny M.F. Airborne estimation of sea turbidity parameters from the WRELANDS laser airborne depth sounder. Applied Optics. 1986, 25, 2080–2088.

5. Bravo-Zhivotovsky D.M., Dolin L.S., Savel’ev V.A., Fadeev V.V., Shchegol’kov Yu.B. Optical methods for sounding of the ocean: laser remote sensing. Methods of Remote Sensing of the Ocean / Ed. By Bravo-Zhivotovsky D.M., Dolin L.S. Institute of Applied Physics, Gorky, USSR, 1987, 84–125 (in Russian).