Radar Sounder Observation of Phobos Safaeinili, A. ; Cicchetti, A. ; Nenna, C. ; Calabrese, D. ; Jordan, R. ; Duxbury, T. ; Plaut, J. ; Picardi, G. ; Flamini, E. ; Plettemeier, D. Abstract Publication: Exploration of Phobos and Deimos Pub Date: 2007 Bibcode: 2007epd..conf...34S