A Study on Sunward-propagating Alfvénic Fluctuations with a Power-law Spectrum (SAFP) Observed by the WIND Spacecraft

Honghong Wu1, Xin Wang2, Chuan-Yi Tu3, Linghua Wang4, Jiansen He3 and Hui Tian3, (1)Peking University, School of Earth and Space Sciences, Beijing, China, (2)Beihang University, School of Space Science and Environment, Beijing, China, (3)Peking University, Beijing, China, (4)Peking University, Institute of Space Physics and Applied Technology, Beijing, China