In this paper statistical assessment of target parameters, in polarimetric remote sensing radars, such as scattering mechanism and Entropy are extracted and simulated. For this objective eigenvector analysis technique by target decomposition method (TDM) used for calculating eigenvector as well as probability of them from their coherency or covariance matrix. In addition, a simulation scheme developed for calculating Entropy and Scattering mechanism for spheroid targets and rough surfaces. In this work, drop size distribution (DSD) is considered for stochastic process of spheroid rain droplet. Results for different distributions presented and compared with radar data set from German Aerospace center (DLR).