Re-modeling plan for Japanese balloon-borne cloud/precipitation particle imaging radiosondes to migrate radiowave frequency from 1680 MHz to 400 MHz

Kensaku Shimizu, Meisei Electric Co., Ltd., Isesaki, Japan, Masatomo Fujiwara, Hokkaido Univ, Sapporo, Japan and Kenji Suzuki, Yamaguchi Univ, Yamaguchi, Japan