Relationship Between the Radio Bursts from the Sun and Ionospheric Propagation

On the High Frequency (HF, 3 – 30 MHz) radio bands, radio waves are able to travel around the world without the help of satellites, repeaters, or any other intermediate equipment. They do this by bouncing between ionosphere and the earth before reaching their final destination. Amateur radio operators, shortwave broadcasters, ships on the high seas, and the military are just some of the groups that make use of this phenomena, known as sky-wave propagation. Because the ionospheric conditions are dependent on solar activity, it is important to study how solar phenomena affects radio propagation.