Abstract
In this paper, we examine the Doppler velocities simultaneously derived from the EISCAT VHF radar and the dynasonde, under the PMSE conditions. Spectral and filtering analyses are applied to study the velocities in detail. It is found that the high- and the low-frequency motions derived from the two radars correlate differently, high for low-frequency and low for high-frequency component. The agreement/discrepancy between the two velocities are interpreted in terms of radar scattering/operation principles and characteristics of acoustic gravity waves.
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