Astrometric observations of Phobos and Deimos with the SRC on Mars Express J. Oberst, K. D. Matz, T. Roatsch, B. Giese, H. Hoffmann, T. Duxbury and G. Neukum A&A, 447 3 (2006) 1145-1151 Published online: 10 February 2006 DOI: 10.1051/0004-6361:20053929