Experiments on IMT-2000 Using Unmanned Solar Powered Aircraft at an Altitude of 20 km. - Masayuki Oodo; Hiroyuki Tsuji; Ryu Miura; Masaaki Maruyama; Mikio Suzuki; Yuichiro Nishi; Hisashi Sasamoto (IEEE Trans. Veh. Technol., 2005)