Radio propagation beacon — A radio propagation beacon is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on HF, VHF, UHF, and microwave frequencies.… … Wikipedia
Beacon Hill, New South Wales — Infobox Australian Place | type = suburb name = Beacon Hill city = Sydney state = nsw caption = Beacon Hill Summit from Beacon Hill Oval lga = Warringah Council postcode = 2100 est = pop = 5,994 [On the night of August 7, 2001. cite web |url=http … Wikipedia
Electric beacon — Electric beacons are a kind of beacon used with direction finding equipment to find ones relative bearing to a known location (the beacon).The term electric beacon includes radio, infrared and sonar beacons. Radio beacons A radio beacon is a… … Wikipedia
List of radio propagation topics — This is a list of radio propagation terms. NOTOC A a index A index aa index active prominence active prominence region (APR) active region active surge region (ASR) active dark filament (ADF) AE index Air Force Geophysics Laboratory (AFGL) arch… … Wikipedia
Letter beacon — Signal of letter beacon D on 5137.5 kHz Letter beacons are radio transmissions of uncertain origin, which consist of only a single repeating Morse Code letter. They are also often referred to as: SLB, or Single Letter Beacons SLHFB, or… … Wikipedia
Automatic link establishment — Automatic Link Establishment, commonly known as ALE, is the worldwide de facto standard for digitally initiating and sustaining HF (High Frequency) radio communications.cite web|title=Frequency Agile Systems in the MF/HF Bands |author=Telecom… … Wikipedia
Ionosonde — A ionosonde, or chirpsounder, is a special radar for the examinatation of the ionosphere. An ionosonde is a shortwave transmitter tunable through the whole shortwave range, which transmits on various shortwave frequencies pulses, whose echos are… … Wikipedia
Ionogram — An ionogram is a display of the data produced by an ionosonde. It is a graph of the virtual height of the ionosphere plotted against frequency. Ionograms are often converted into electron density profiles. Data from ionograms may be used to… … Wikipedia
Réseau Luxembourgeois des Amateurs d'Ondes Courtes — infobox Organization name = Réseau Luxembourgeois des Amateurs d Ondes Courtes image border = size = 90px caption = msize = mcaption = abbreviation = RL motto = formation = extinction = type = Non profit organization status = purpose = Advocacy,… … Wikipedia
радиомаяк для контроля условий распространения (радиоволн) — Передатчик контрольных (зондирующих) сигналов, с помощью которых оцениваются ослабление сигнала на трассе распространения радиоволн. [Л.М. Невдяев. Телекоммуникационные технологии. Англо русский толковый словарь справочник. Под редакцией Ю.М.… … Справочник технического переводчика
Timeline of Christian missions — This timeline of Christian missions chronicles the global expansion of Christianity through a sampling of missionary outreach events. A more general timeline of Christianity and History of Christianity is also available. Apostolic Age Earliest… … Wikipedia
