Sunward-Propagating Alfvénic Fluctuations Observed in the Heliosphere

Hui Li1, Chi Wang1, John W Belcher2, Jiansen He3 and John D Richardson4, (1)NSSC National Space Science Center, CAS, Beijing, China, (2)Massachusetts Institute of Technology, Cambridge, MA, United States, (3)Peking University, Beijing, China, (4)MIT, Cambridge, MA, United States