Measurement of movements in the ionosphere using radio reflections

Physics

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Diffraction Patterns, Doppler Radar, Ionospheric Drift, Radio Echoes, D Region, Drift Rate, E Region, Electromagnetic Scattering, F Region

Scientific paper

Movements of the ionosphere may be measured using radio reflections either by observing the movement of the diffraction, or interference, pattern along the ground; or by using the Doppler shifts of the echo as a radar beam is scanned across the sky. The two methods may use the same experimental arrangement and even the same data. The error in the drift velocity measured for scattered echoes is inversely proportional to the square of the array size for both methods. More detail of the random motion may be observed with the Doppler method. When the radio reflections are from an undulating surface in the ionosphere which changes its form as it moves, the Doppler method combined with further analysis is required to measure the movement and change of the undulating surface.

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