A technique for data mining the reflection characteristics of 3D objects of monostatic optical location systems is discussed. The time profile of the pulse scattering cross section (SCS) of a target has been corrected via the deconvolution method. The continuous and “discontinuous” components of the pulse SCS have been reconstructed on the basis of the estimated time positions of its inflection points. The parameters of the polyGaussian model describing the discontinuous component of the transient response of a location object have been obtained with the help of the Estimation-Maximization (EM) algorithm.