1. Meteorological College; Kashiwa Japan
2. National Institute of Polar Research; Tachikawa Japan
3. Naze Weather Station, Kagoshima Local Meteorological Observatory; Kagoshima Japan
4. Department of Earth and Planetary Sciences, Faculty of Sciences; Kyushu University; Fukuoka Japan
5. National Institute of Information and Communications Technology; Koganei Japan
6. Faculty of Science and Technology; Seikei University; Tokyo Japan