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- W1994923914 abstract "The HF phased-array pencil beam radar at Bribie Island, Australia, used to measure horizontal movements of the ionosphere, has been calibrated using the known velocity of the sunrise terminator. The seasonal variation in the velocity of the terminator has been resolved, both in magnitude and direction. The technique uses single-station ionospheric sounding, and requires the angle of arrival and Doppler shift of ionospheric echoes to be measured as the terminator passes overhead. Pfister's theorem [(1971), J. atmos. terr. Phys. 33, 999] then allows calculation of the velocity of the reflecting surface. The difference between theory and experiment is less than 3% in speed and 2° in direction on average." @default.
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- W1994923914 date "1990-03-01" @default.
- W1994923914 modified "2023-09-26" @default.
- W1994923914 title "Radar measurement of the seasonal variation in the velocity of the sunrise terminator" @default.
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- W1994923914 doi "https://doi.org/10.1016/0021-9169(90)90125-7" @default.
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