Abstract
Ionospheric amplitude scintillations of transmissions in the VHF range from orbiting satellites were compared with topside and ground (bottomside) ionograms of an inhomogeneous region in southern mid-latitudes. It is evident that, for the event considered, there is a good spatial correlation between intense topside and bottomside spread- F and scintillations. The ionospheric disturbance pattern appears to agree with a quasi-sinusoidal model of frontal disturbances (derived from the angle-of-arrival experiments) in the F- region at these geographic latitudes.
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