Observation of Severe Weather Activities by Doppler Sounder Array

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Abstract
A three-dimensional, nine-element, high-frequency cw Doppler sounder array has been used to detect ionospheric disturbances during periods of severe weather, particularly during periods with severe thunderstorms and tornadoes. One typical disturbance recorded during a period of severe thunderstorm activity and one during a period of tornado activity have been chosen for analysis in this note. The observations indicate that wave-like disturbances possibly generated by the severe weather have wave periods in the range 2–8 min which place them in the infrasonic wave category.

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