Jiankui Shi¹, Ziying Zhang¹, Klaus Torkar², Zhengwei Cheng¹, C Philippe Escoubet³, Andrew Neil Fazakerley⁴ and Malcolm Wray Dunlop⁵, (1)NSSC/Chinese Academy of Sciences, Beijing, China, (2)Space Research Institute / Austrian Academy of Sciences, Graz, Austria, (3)ESTEC/ESA, Noordwijk, Netherlands, (4)Mullard Space Science Lab., Dorking, United Kingdom, (5)Rutherford Appleton Laboratory, Didcot, United Kingdom