skywave
Noun
Meaning
skywave (plural skywaves)
(radio) An electromagnetic wave refracted back to the Earth by the ionosphere.
Examples
At this medium wavelength, long distance transmission in the daytime is not possible because of heavy absorption of the skywave in the ionosphere.
Kluwer, Dordrecht 1993 ISBN 0-7923-0775-5 Predictions of skywave propagation depend on: *The distance from the transmitter to the target receiver.
The F₂ layer remains by day and night responsible for most skywave propagation of radio waves, facilitating high frequency (HF, or shortwave ) radio communications over long distances.
The ionization of the atmosphere varies with time of day and season as well as with solar conditions, so the upper frequency limit for skywave communication varies on an hourly basis.
This prevents skywave propagation from being very effective on mediumwave frequencies in daylight hours.