Positive recoil leader in rocket-triggered and tower-initiated lightning flashes as observed by high speed video camera

Xiushu Qie1, Yunjiao Pu1, Rubin Jiang1, Mingyuan Liu1 and Zhuling Sun2, (1)Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China, (2)Key Laboratory of Middle Atmosphere and Global Environment Observation (LAGEO), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China