“…TGFs have been associated with radio signals generated by lightning discharges [ Inan et al , ]. In particular, a close relationship between TGFs and +IC lightning, which develop in a stepped manner transporting electrons from the MN charge layer toward the UP charge layer, has been reported [ Cummer et al , ; Stanley et al , ; Shao et al , ; Lu et al , ; Cummer et al , ; Østgaard et al , ; Cummer et al , ].…”