Pitch-Angle Distribution for Electrons at Dipolarization Sites: Field Aligned Anisotropy and Isotropization

Kaiti Wang1, Ching-Huei Lin2, Tohru Hada3, Toshi Nishimura4, Vassilis Angelopoulos5, Wei-Jung Lee1 and Zhou-Ren Lang1, (1)NCKU National Cheng Kung University, Tainan, Taiwan, (2)Chien Hsin University of Science and Technology, Zhongli, Taiwan, (3)Kyushu University, Department of Advanced Environmental Science and Engineering, Faculty of Engineering Sciences, Fukuoka, Japan, (4)University of California Los Angeles, Los Angeles, CA, United States, (5)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States