An automatic method for identification of polar cap boundary and patches by using in-situ plasma measurements and its applications

Yu-Zhang Ma1, Qing-He Zhang2, Zan-Yang Xing3, Roderick A Heelis4 and Y. Wang3, (1)Shandong University at Weihai, Weihai, China, (2)National Space Science Center, Chinese Academy of Sciences, Beijing, China, (3)Shandong University, Jinan, China, (4)University Texas Dallas, Richardson, United States