Study on the sea ice thickness observation in the Sea of Okhotsk by using dual-frequency and fully polarimetric airborne SAR (Pi-SAR) data. - Kazuki Nakamura; Hiroyuki Wakabayashi; Masashige Nakayama; Kazuhiro Naoki; Takenobu Toyota; Shinsuke Kojima; Fumihiko Nishio; Seiho Uratsuka (IGARSS, 2004)