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An Over-The-Horizon Radar (OTHR) has been deployed near Ottawa, Canada. The radar is aimed northward and collects auroral echoes through line-of-sight propagation and ground echoes from beyond the horizon through ionospheric reflection. These echoes have been resolved in the three spatial dimensions of range, azimuth, and elevation, as well as in the temporal dimension of Doppler. It is shown that...
The spatial autocorrelation of an electric field associated with an electromagnetic wave packet is modified by propagation through the ionosphere. An analytic formula for the autocorrelation is derived based on a linear plasma density profile for the ionosphere and a power-law turbulence spectrum for ionospheric irregularities. This work provides guidance for interpreting the results of radio experiments...
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