Dolin L. S., Levin I. M.
A theoretical background for the methods of determination of the total scattering coefficient (b) by measurement of the light field of a wide-angle point source is given. The three versions of the instrument design, each of them including two sensors, are analyzed. The sensors of version 1 measure the total (direct and scattered) and nonscattered irradiances, while the sensors of version 2 measure the total and scattered irradiances, and those of version 3 measure the nonscattered and scattered irradiances. The optimal conceptual versions of the b-meter designing method for coastal and pure seawaters are suggested. It is shown how to find the parameters of light source and receiver to ensure the minimal errors of the b-measurement.