Observation of sea-ice thickness in the sea of Okhotsk by using dual-frequency and fully polarimetric airborne SAR (pi-SAR) data. - Kazuki Nakamura; Hiroyuki Wakabayashi; Kazuhiro Naoki; Fumihiko Nishio; Teruo Moriyama; Seiho Uratsuka (IEEE Trans. Geosci. Remote. Sens., 2005)