What is Skywave Propagation?

Skywave Propagation describes the behavior of radio signals at high frequencies (HF), typically in the range from 3 to 30 MHz. Skywaves can travel hundreds of kilometers, allowing for long-distance communication. The free electron density of the ionosphere influences the reflection of these radio waves. During the day, the ionosphere becomes more ionized, with higher frequencies reflected back to Earth. At night, it becomes less ionized, with lower frequencies reflected back to Earth.