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Illustration of Skywave Propagation Modes![]() |
Line of sight involves direct transmission; ground waves descend along Earth's surface; and skywaves (HF bands) bounce off the ionosphere over very long distances. Therefore, understanding skywave propagation is essential for radio amateurs.
The solar radiation generates Earth's ionosphere, that enables HF radio waves to be reflected and propage over very long distances.
The "propagation conditions" of skywave change along time of day, seasons, and due to the erratic solar activity.
Understanding skywave propagation is crucial for a successful communication of radio amateurs, requiring them to learn and practice various factors.
Find here basic and advanced explanations, practical methods, map-charts, banners, calculators, real-time reports 1, 2, 3, 4, 5, 6, 7, 8, models 1, 2, 3, table of contents, index of terms, and references
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The entire website contains additional pages that each cover a sub-topic. See the sitemap.
Real time radio propagation map
Current solar conditions Ham radio
Current Ham Radio HF Propagation
HF Radio Propagation Search Terms
Current HF Band Conditions Online Map
Current Ham Radio Propagation Conditions
Real-time watching of worldwide ham activity
Real-time watching of worldwide hams' activity