Skywave
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In radio communication, skywave or skip refers to the propagation of radio waves reflected or refracted back toward Earth from the ionosphere, an electrically charged layer of the upper atmosphere. Si
Radio waves (black) reflecting off the ionosphere (red) during skywave propagation. Line altitude in this image is significantly exaggerated and not to scale.
Example of F2 and Sporadic-E Propagation on the 10-meter band taken from PSK Reporter (Mins = Minutes).
High frequency
Videos
High frequency is the ITU designation for the band of radio waves with frequency between 3 and 30 megahertz. It is also known as the decameter band or decameter wave as its wavelengths range from one
Skywave
…months in both hemispheres) – a distant VHF FM or TV station can sometimes be received as clearly as local stations. Most long-distance shortwave (high frequency) radio communication – between 3 and 30 MHz – is a result of skywave propagation. Since the early 1920s, amateur radio operators (or "hams"), limited…
A modern Icom M700Pro two-way radio for marine HF radio communications.
An amateur radio station incorporating two HF transceivers.
A typical Yagi antenna used by a Canadian radio amateur for long distance communication
Boeing 707 used a HF antenna mounted on top of the tail fin