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ionosonde
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Definitions of ionosonde in various dictionaries:
IONOSONDE - An ionosonde, or chirpsounder, is a special radar for the examination of the ionosphere. The basic ionosonde technology was invented in 1925 by Grego...
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A radar for the examination of the ionosphere. |
An instrument for obtaining information about the ionosphere by transmitting a succession of radio pulses into it at different frequencies and recording and analysing their echoes. |
Ionosonde description |
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An ionosonde, or chirpsounder, is a special radar for the examination of the ionosphere. The basic ionosonde technology was invented in 1925 by Gregory Breit and Merle A. Tuve and further developed in the late 1920s by a number of prominent physicists, including Edward Victor Appleton. The term ionosphere and hence, the etymology of its derivatives, was proposed by Robert Watson-Watt. * An ionosonde consists of:* A high frequency (HF) radio transmitter, automatically tunable over a wide range. Typically the frequency coverage is 0.523 MHz or 140 MHz, though normally sweeps are confined to approximately 1.612 MHz. * A tracking HF receiver which can automatically track the frequency of the transmitter. * An antenna with a suitable radiation pattern, which transmits well vertically upwards and is efficient over the whole frequency range used. * Digital control and data analysis circuits.The transmitter sweeps all or part of the HF frequency range, transmitting short pulses. These pulses are refl |