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The CUTLASS Finland radar has been run in atwo-beam special scan mode, which offered excellent temporal and spatialinformation on the flows in the high-latitude ionosphere. A detailed study ofone day of this data revealed a convection reversal boundary (CRB) in theCUTLASS field of view (f.o.v) on the dayside, the direction of plasma floweither side of the boundary being typical of a dawn-cell convection pattern.Poleward of the CRB a number of pulsed transients are observed, seemingly movingaway from the radar. These transients are identified here as the ionosphericsignature of flux transfer events (FTEs). Equatorward of the CRB continuousbackscatter was observed, believed to be due to the return flow on closed fieldlines. The two-beam scan offered a new and innovative opportunity to determinethe size and velocity of the ionospheric signatures associated with fluxtransfer events and the related plasma flow pattern. The transient signature wasfound to have an azimuthal extent of 1900 ± 900 km and an poleward extent of&#x223C;250 km. The motion of the transient features was in a predominantly westwardazimuthal direction, at a velocity of 7.5 ± 3 km.  <b>Key words.</b> Magnetospheric physics (auroral phenomena;magnetopause · cusp and boundary layers; magnetosphere - ionosphereinteraction

CUTLASS Finland radar observations of the ionospheric signatures of flux transfer events and the resulting plasma flows