[1] Univ Poitiers, UMR 6630 CNRS, Met Phys Lab, F-86962 Futuroscope Chasseneuil, France
[2] Univ Sci & Technol Lille, ESA CNRS 8008, Lab Struct & Properties Etat Solide, F-59655 Villeneuve Dascq, France
[3] Univ Bayreuth, Bayer Geoinst, D-8580 Bayreuth, Germany