Occurrence rate of ion upflow and downflow observed by the Poker Flat Incoherent Scatter Radar (PFISR)

Jiayue Lu, University of Michigan Ann Arbor, Ann Arbor, MI, United States, Shasha Zou, University of Michigan, Climate and Space Sciences and Engineering, Ann Arbor, United States and Roger H Varney, National Center for Atmospheric Research, Boulder, United States