1. Faculty of Civil, Geo and Environmental Engineering, Technische Universität München, Munich 82234, Germany
2. Remote Sensing Division, National Institute for Space Research, São José dos Campos 12227-010, Brazil
3. Electric Engineering Department, Catholic University of Rio de Janeiro, Rio de Janeiro, 38097, Brazil
4. Department of Computer Engineering, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro, Brazil