Shortwave radio - Wikipedia
Shortwave radio is radio transmission using radio frequencies in the shortwave bands (SW).
Shortwave (meteorology) - Wikipedia
A shortwave or shortwave trough is an embedded kink in the trough / ridge pattern. Its length scale is much smaller than that of and is embedded within longwaves, which are responsible for the largest scale (synoptic scale) weather systems.
Longwaves and Shortwaves - National Oceanic and Atmospheric Administration
2024年11月1日 · Shortwaves are embedded within the longwaves. Unlike the slow movement of longwaves, shortwaves move east (downstream) on average of 23 mph (20 kts, 37 km/h) in summer and 35 mph (30 kts, 55 km/h) in winter. This motion causes longwaves to distort and change shape, such as deepening longwave troughs and flattening longwave ridges.
On The Shortwaves
Ontheshortwaves.com is devoted to the history of shortwave broadcasting and the shortwave broadcast DXing hobby.
Shortwave radio | Amateur Radio, Emergency Communications
2024年10月25日 · Shortwave radio, transmission and reception of information by means of electromagnetic waves about 10 to 80 m (33 to 262 feet) in length having frequencies of approximately 29.7 to 3.5 megahertz. During the early 1920s attempts were made to transmit radio signals over long distances by bouncing.
Shortwave bands - Wikipedia
Shortwave bands are frequency allocations for use within the shortwave radio spectrum (the upper medium frequency [MF] band and all of the high frequency [HF] band).
What is shortwave radio? Everything you need to know - Radio …
2023年9月3日 · Shortwave radio is a frequency that operates somewhere between the FM and AM bands on your standard radio set. Shortwave can travel exceptionally long distances, which makes it an excellent option for anyone hoping to reach a wide audience. In Canada, the US, and Europe, local FM/AM broadcasting is freely available.
Short Wave - NPR
5 天之前 · Short Wave. From NPR. New discoveries, everyday mysteries, and the science behind the headlines — in just under 15 minutes. It's science for everyone, using a lot of creativity and a little...
What is a Shortwave? - OpenSnow
2023年6月2日 · Shortwaves are a source of lift needed to set warm, moist air currents into motion. And shortwaves combined with favorable orographic lift can result in numerous mountain thunderstorms with lightning posing a hazard to hikers, climbers, and other outdoor enthusiasts.
NOAA's National Weather Service - Glossary
Shortwave. Also known as Shortwave Trough; a disturbance in the mid or upper part of the atmosphere which induces upward motion ahead of it. If other conditions are favorable, the upward motion can contribute to thunderstorm development ahead of a shortwave.
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