OBSERVATIONS on the horizontal movements in the F-region of the ionosphere by radio methods ... in which use has been made of the continuous-wave radio signals from a distant short-wave transmitter.

Above the stratosphere the sparse atoms and molecules of air are disrupted by the harsher radiations of the sun. A revealing and useful property of this mantle is its reflection of radio waves ...

BISMARCK, N.D. (KFYR) - After the sun goes down, you may notice that you can hear some AM radio stations broadcasting from ...

Each radar bounces radio waves off the ionosphere and analyzes the returning signal. Three of the Super Dual Auroral Radar Network (SuperDARN) sites are in the contiguous U.S.—in Kansas ...

The next suggestion is a handbook such as Reference Data for Radio Engineers ... discuss the ionosphere, ionospheric reflection, HF propagation paths, and single-site locator operation. The primary ...

Usually, the ionosphere reflects radio waves, allowing signals to be bounced long distances around the world. However, when this layer is ionized, it absorbs frequencies below 30 MHz, leading to ...

AM waves, which have a lower frequency, are attenuated when they are refracted from the ionosphere or the Earth’s surface, resulting in shorter travel distances than shortwaves. Shortwave radio ...