We obtain the equations for determining the spatial moments of the radial distribution of brightness in the pulsed radiation field of a point isotropic source and similar characteristics of the distribution of irradiance from a point unidirectional source on the assumption of strong anisotropy of the scattering indicatrix of a medium and the studied light field. The procedure of analytical solution of these equations is shown. Formulas for calculating the spatial parameters of the light pulse at a given time instant, i.e., the distance between the front edge and the barycenter of the pulse, as well as its characteristic length, are derived. It is shown how and under which conditions the time parameters of the pulse can be determined from its spatial parameters.