Dr. W. C. Leite Filho received his Masters degree in 1982 and did his Ph.D from Federal University of Rio de Janeiro in 1991. He is currently working as Senior Researcher in the department of Space Systems of Aeronautics and Space Institute, São Paulo, Brazil. He has 161 publications in National and International journals and conferences to his credit. His areas of interest are in Guidance, Navigation, Control and Simulation of Aerospace Systems.