An HF bi-phase shift keying radar: application to ice sounding in Western Alps and Spitsbergen glaciers. - Florence Nicollin; Yves Barbin; Wlodek Kofman; Daniel Mathieu; Svein-Erik Hamran; Pierre Baüer; José Achache; Jacques Blamont (IEEE Trans. Geosci. Remote. Sens., 1992)