- very low frequencies (VLF)
- Макаров: очень низкие радиочастоты (часть общего спектра радиочастот; 3-30 кГц; онч), онч (часть общего спектра радиочастот; 3-30 кГц; очень низкие радиочастоты)
Универсальный англо-русский словарь. Академик.ру. 2011.
very low frequencies (VLF)
Смотреть что такое "very low frequencies (VLF)" в других словарях:
very low frequencies — The range of radio frequencies between 3 and 30 kHz. These are invariably ground waves, and with high power and large, efficient antennae they can provide worldwide coverage. VLF is used by Omega … Aviation dictionary
Very low frequency — or VLF refers to radio frequencies (RF) in the range of 3 kHz to 30 kHz. Since there is not much bandwidth in this band of the radio spectrum, only the very simplest signals are used, such as for radio navigation. Also known as the myriameter… … Wikipedia
Low frequency — or LF refers to Radio Frequencies (RF) in the range of 30 kHz ndash;300 kHz. In Europe, and parts of Northern Africa and of Asia, part of the LF spectrum is used for AM broadcast service. In the western hemisphere, its main use is for aircraft… … Wikipedia
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
Frequency band designations — ▪ Table Frequency band designations frequency designation frequency range wavelength range very low frequencies (vlf) 3–30 kilohertz 100,000–10,000 m low frequencies (lf) 30–300 kilohertz 10,000–1,000 m medium frequencies (mf) 300–3,000 kilohertz … Universalium
telecommunications media — Introduction equipment and systems metal wire, terrestrial and satellite radio, and optical fibre employed in the transmission of electromagnetic signals. Transmission media and the problem of signal degradation Every… … Universalium
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
Espectro electromagnético — Saltar a navegación, búsqueda Diagrama del espectro electromagnético, mostrando el tipo, longitud de onda con ejemplos, frecuencia y temperatura de emisión de cuerpo negro. Se denomina espectro electromagnético a la distribución energética del… … Wikipedia Español
Shortwave radio — Shortwave can also refer to a shortwave trough meteorology. A solid state, analog shortwave receiver Shortwave radio refers to the upper MF (medium frequency) and all of the HF (high frequency) portion of the radio spectrum, between… … Wikipedia
Radiofrecuencia — Este artículo trata sobre la parte del espectro electromagnético. Para los aspectos técnicos de las comunicaciones por este medio, véase Radiocomunicación. «RF» redirige aquí. Para el elemento químico de símbolo Rf, véase Rutherfordio. El término … Wikipedia Español
Rugby transmitting station — NOTOC The Rugby transmitting station was a large very low frequency (VLF) transmission facility near the town of Rugby, Warwickshire in England, situated just west of the A5 trunk road and in later years junction 18 of the M1 motorway. It came… … Wikipedia
