1. State Key Laboratory of Severe WeatherChinese Academy of Meteorological SciencesBeijingPeople's Republic of China
2. Laboratory of Lightning Physics and Protection EngineeringChinese Academy of Meteorological SciencesBeijingPeople's Republic of China
3. Institute of Tropical and Marine Meteorology, China Meteorological AdministrationGuangzhouGuangdongPeople's Republic of China
4. Department of Electrical and Computer EngineeringUniversity of FloridaGainesvilleFloridaUSA
5. Department of Electrical, Electronic and Computer EngineeringGifu UniversityGifuJapan