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extremely low frequency communications

См. также в других словарях:

  • 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

  • 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

  • Advanced Extremely High Frequency — The Advanced Extremely High Frequency (AEHF) system will provide connectivity across the spectrum of mission areas, including land, air and naval warfare; special operations; strategic nuclear operations; strategic defense; theater missile… …   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

  • Maritime Communications Reference Guide — Introduction/Purpose This guide is designed to describe the characteristics, use and recognition of Maritime Communication Systems and their components. It is not intended to be an exhaustive engineering design manual, rather, its utility is… …   Wikipedia

  • Minimum Essential Emergency Communications Network — The Minimum Essential Emergency Communications Network (MEECN) is a network of systems providing uninterrupted communications throughout the pre , trans , and post nuclear warfare environment. At minimum, MEECN is designed to provide a one way… …   Wikipedia

  • High frequency active auroral research program — 62°23′30″N 145°09′00″O / 62.39167, 145.15 …   Wikipédia en Français

  • radio frequency interference —    Abbreviated RFI. Many electronic devices, including radios, televisions, computers, and peripherals, can interfere with other signals in the radio frequency range by producing electromagnetic radiation. The use of radio frequencies is… …   Dictionary of networking

  • Communications media in Romania — Part of a series on the Culture of Romania Topics …   Wikipedia

  • 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

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