ionosonde


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ionosonde

[ī′än·ə‚sänd]
(engineering)
A radar system for determining the vertical height at which the ionosphere reflects signals back to earth at various frequencies; a pulsed vertical beam is swept periodically through a frequency range from 0.5 to 20 megahertz, and the variation of echo return time with frequency is photographically recorded.
References in periodicals archive ?
Those atmospheric changes can be tracked using satellites and radar systems called ionosondes.