1. Key Laboratory of Digital Earth Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
2. University of Chinese Academy of Sciences, Beijing 100190, China
3. USDA-Agricultural Research Service, Aerial Application Technology Research Unit, College Station, TX 77845, USA
4. Earth Observation and Satellite Image Applications Laboratory (EOSIAL), School of Aerospace Engineering (SIA), Università di Roma ‘La Sapienza’, Via Salaria, 851, 00138 Roma, Italy