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Zeven DECCA-transmitter
The Zeven DECCA-transmitter was a transmitting facility for DECCA transmission at Zeven, Germany. It used a 93 metre tall guyed mast antenna, which is insulated against ground. As backup antenna, a 46-meter mast radiator also insulated against ground was in its proximity. From 1952 until 1992 the DECCA transmitter Zeven belonged to the German DECCA chain, which consisted of transmitters at Brilon, Stadtkyll and Coburg-Lautertal. In this chain it was the "Green" station and transmitted on 127,1100 kHz. After 1968 the station served also in the Frisian DECCA-chain as the "Purple"-station and used the frequency of 71.433 kHz. From 1992 until the shut-down of Frisian Decca chain on December 31, 1999, this station was operated exclusively for this DECCA chain. After shut-down of DECCA, the facility was not used until the 2004. At this year it started transmitting of DGPS-signals on the frequency 303.5 kHz. In 2017 the 93m tall mast was demolished, because a new built ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decca Navigation System
The Decca Navigator System was a hyperbolic radio navigation system which allowed ships and aircraft to determine their position by using radio signals from a dedicated system of static radio transmitters. The system used phase comparison of two low frequency signals between 70 and 129 kHz, as opposed to pulse timing systems like Gee and LORAN. This made it much easier to design receivers using 1940s electronics, and operation was simplified by giving a direct readout of Decca coordinates without the complexity of a cathode ray tube and highly skilled operator. The system was invented in the U.S., but development was carried out by Decca in the UK. It was first deployed by the Royal Navy during World War II for the vital task of clearing the minefields to enable the D-Day landings. The Allied forces needed an accurate system not known to the Germans and thus free of jamming. After the war, it came off the secret list and was commercially developed by the Decca Company and de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zeven
Zeven [] is a town in the Rotenburg (district), district of Rotenburg, in Lower Saxony, Germany. It has a population of around 14,000. The nearest large towns are Bremerhaven, Bremen (city), Bremen and Hamburg. It is situated approximately 22 km northwest of Rotenburg, and 40 km northeast of Bremen. Zeven is also the seat of the ''Samtgemeinde'' ("collective municipality") Zeven. Location Zeven is located in the Zevener Geest in the centrum of the Elbe-Weser Triangle. The closest major city is Hamburg. History In 986 Zeven was first mentioned in a document of the Benedictine in Heeslingen, then giving its name as ''kivinan à Heeslingen'' (Kivinan near Heeslingen). In 1141 the convent was relocated to Zeven. The convent played a determining role in Zeven's history. Zeven belonged to the old Duchy of Saxony and at its dissolution in 1180 Zeven became a part of the newly founded Prince-Archbishopric of Bremen, the princely territory of imperial immediacy ruled by th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DGPS
Differential Global Positioning Systems (DGPSs) supplement and enhance the positional data available from global navigation satellite systems (GNSSs). A DGPS for GPS can increase accuracy by about a thousandfold, from approximately to . DGPSs consist of networks of fixed position, ground-based reference stations. Each reference station calculates the difference between its highly accurate known position and its less accurate satellite-derived position. The stations broadcast this data locally—typically using ground-based transmitters of shorter range. Non-fixed (mobile) receivers use it to correct their position by the same amount, thereby improving their accuracy. The United States Coast Guard (USCG) and the Canadian Coast Guard (CCG) each run DGPSs in the United States and Canada on longwave radio frequencies between and near major waterways and harbors. The USCG's DGPS was named NDGPS (Nationwide DGPS) and was jointly administered by the Coast Guard and the U.S. Departme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Famous Transmission Sites
In the following there are lists of sites of notable radio transmitters. During the early history of radio many countries had only a few high power radio stations, operated either by the government or large corporations, which broadcast to the population or to other countries. Because of the large number of transmission sites, this list is not complete. Outside of Europe senders and repeater stations are emphatically presented from international services. Legend Europe Austria Belarus * Molodecno (VLF) Belgium * Schoten (FM, TV* Transmitter Wavre, Wavre (MW, SW shut down) FM DAB TV) *Overijse (MW closed) Bosnia and Herzegovina * Mostre transmitter (MW) Bulgaria * Kaliakra (MW) * Vakarel (LW, MW) Croatia *Grbre transmitter (MW) * Deanovec transmitter (MW, KW) Czech Republic * Liblice (LW closed 1.1.2021) * Liblice (MW closed) * Topolná (LW dismantled) * Mělník-Chloumek (MW closed) * Dobrochov (MW closed) * Jested (FM) Denmark *Kalundborg (LW, MW) Finland *Lahti (LW, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Masts And Towers In Germany
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is very widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
