1. Département de Géomatique Appliquée; Université de Sherbrooke; Sherbrooke Québec Canada
2. Now at Department of Geology and Geophysics, School of Ocean and Earth Science and Technology; University of Hawai‘i at Manoa; Honolulu Hawaii USA
3. Department of Space Exploration; Canadian Space Agency; Saint-Hubert Québec Canada
4. Hawai‘i Institute of Geophysics and Planetology; Honolulu Hawaii USA