Abstract: High Frequency (HF) communication systems use radio waves at frequencies in the range of 3-30 MHz propagating in the form of skywave with the help of the ionosphere. For emergency ...
Scouts from Troops 133, 1651 and 175 recently got a taste of high-tech communication during the annual Jamboree on the Air, ...
National Sandwich Day falls on the birthday of John Montagu, the 4th Earl of Sandwich, who is often credited as the inventor ...
Abstract: The multi-frequency multipath observations of temporal variations in the Doppler spectra and signal amplitudes of HF radio waves reflected from the ionosphere, which accompanied ionospheric ...
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