ABSTRACT
The operation of an airborne lidar intended for the detection of fish schools is numerically simulated by the Monte Carlo method. The calculations are performed for schools located at small depths in order to study the regularities in the shaping of the lidar return accurately. Three models of the phase function of scattering of laser radiation in sea water are used. The signals reflected from surface waters that contain a school of fish are determined as a function of the lidar parameters, light scattering and absorption coefficients in the water, stratification of light scattering layers, and fish-school depth. The results obtained can be used for interpreting the signals of the fish-detection lidar.
ABSTRACT
The development of methods for active optical sounding of the wind velocity vector on the basis of scattered signal correlation requires a detailed study of the inhomogeneity parameters of the scattering properties of the atmosphere. However, at present the information on inhomogeneity parameters is mainly limited by stating the fact of their presence and reporting on the contrast value of atmospheric scattering irregularities under definite atmospheric conditions. The knowledge of inhomogeneity sales and their lifetimes is also extremely important for correlation sounding of wind velocity. The present paper gives the results of experimental investigations of inhomogeneity parameters in the ground layer of the atmosphere.
