- extremely low-frequency waves
- волны декамегаметрового диапазона 100 000 - 10 000 км
English-Russian dictionary of telecommunications and their abbreviations. A.V. Alexandrov.. 2004.
extremely low-frequency waves
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Extremely low frequency — (ELF) is the band of radio frequencies from 3 to 30 Hz. ELF was used by the US Navy and Soviet/Russian Navy to communicate with submerged submarines.ExplanationBecause of the electrical conductivity of salt water, submarines are shielded from… … Wikipedia
Extremely high frequency — Frequency range 30 to 300 GHz ITU Radio Band Numbers 1 2 3 4 5 6 7 8 9 10 … Wikipedia
Super low frequency — (SLF) is the frequency range between 30 hertz and 300 hertz. This frequency range includes the frequencies of AC power grids (50 hertz and 60 hertz). The radio services Seafarer (USA) on 76 hertz and ZEVS (Russia) on 82 hertz operate in this… … Wikipedia
Ultra low frequency — The Ultra Low Frequency (ULF) is the frequency range between 300 hertz and 3 kilohertz. Many types of waves in the ULF frequency band can be observed in the magnetosphere and on the ground. These waves represent important physical processes in… … Wikipedia
High Frequency Active Auroral Research Program — HAARP is often confused with Project HARP, the High Altitude Research Project (a joint project of The Pentagon and the Canadian Department of National Defence).The High Frequency Active Auroral Research Program (HAARP) is an investigation project … Wikipedia
Terrestrial stationary waves — are a phenomenon arising in the Earth s interior space because of the conductive ionosphere s action as a waveguide. They were considered by Nikola Tesla to be his most important discovery. The limited dimensions of the earth cause this waveguide … Wikipedia
High frequency active auroral research program — 62°23′30″N 145°09′00″O / 62.39167, 145.15 … Wikipédia en Français
Radio-frequency identification — (RFID) is a technology that uses radio waves to transfer data from an electronic tag, called RFID tag or label, attached to an object, through a reader for the purpose of identifying and tracking the object. Some RFID tags can be read from… … Wikipedia
Ultra high frequency — (UHF) designates a range (band) of electromagnetic waves with frequencies between 300 MHz and 3 GHz (3,000 MHz). Also known as the decimeter band or decimeter wave as the wavelengths range from ten to one decimeters. Radio waves with frequencies… … Wikipedia
gigantic jet — (jy.GAN.tik jet) n. A massive lightning flash that extends from the top of a thundercloud up to the ionosphere. Example Citation: Han Tzong Su of National Cheng Kung University of Taiwan and his colleagues report in the June 25 Nature that they… … New words
electromagnetic radiation — Physics. radiation consisting of electromagnetic waves, including radio waves, infrared, visible light, ultraviolet, x rays, and gamma rays. [1950 55] * * * Energy propagated through free space or through a material medium in the form of… … Universalium
