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Jagdschloss Radar
Jagdschloss, officially the FuG 404, was the designation of a Germany, German early warning radar, early warning and battle control radar developed just prior to the start of World War II. Although it was built in limited numbers, Jagdschloss is historically important as the first radar system to feature a plan position indicator display, or "PPI". In Germany this type of display was referred to as "Panorama". It is named for Jagdschloss, a hunting lodge. Development The PPI effort started fairly early in the history of radar; Hans Hollmann of Telefunken filed a patent for the multi-phase electrostatic deflection in a cathode-ray tube "along a conical surface of revolution" "such as required in practice for instance for the feeding of certain directional antenna systems, or the like" in 1936. At that time development of GEMA's other radars, notably the Freya radar, Freya, took priority, and work on the system did not start until 1939. By this time, radar development had progressed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Warning Radar
An early-warning radar is any radar system used primarily for the long-range detection of its targets, i.e., allowing defences to be alerted as ''early'' as possible before the intruder reaches its target, giving the air defences the maximum time in which to operate. This contrasts with systems used primarily for tracking or gun laying, which tend to offer shorter ranges but offer much higher accuracy. EW radars tend to share a number of design features that improve their performance in the role. For instance, EW radar typically operates at lower frequencies, and thus longer wavelengths, than other types. This greatly reduces their interaction with rain and snow in the air, and therefore improves their performance in the long-range role where their coverage area will often include precipitation. This also has the side-effect of lowering their optical resolution, but this is not important in this role. Likewise, EW radars often use much lower pulse repetition frequency to maximiz ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Würzburg Radar
The low-UHF band Würzburg radar was the primary ground-based tracking radar for the Wehrmacht's Luftwaffe and Kriegsmarine (German Navy) during World War II. Initial development took place before the war and the apparatus entered service in 1940. Eventually, over 4,000 Würzburgs of various models were produced. It took its name from the city of Würzburg in Bavaria. There were two primary models of the system. The first Würzburg was a transportable model that could be folded for transit and then brought into operation quickly after emplacement and levelling. The A models began entering service in May 1940 and saw several updated versions over the next year to improve accuracy, notably the addition of conical scanning in the D model of 1941. The larger Würzburg-''Riese'' (giant) was based on the D model but used a much larger parabolic reflector to further improve resolution at the cost of no longer being mobile. As one of German's primary radars, the British spent considera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Olsker
Olsker is a small community in the north of Bornholm island, Denmark. It is situated in Olsker parish, some 3.5 km south of Allinge and 2.5 km from Tejn. As of 2009, it has 67 inhabitants."407 - Olsker" ''Bornholms Regionskommune''. Retrieved 25 October 2012. It is known for having the highest of the island's four round churches, , from which it takes its name.H.A. Koefoed, "Gøbbanissa – og andre sære bornholmske ord og stednavne", Bornholms Tidendes Forlag, 1997, Olsker also has substation. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wasgau
The Wasgau (, ) is a France, Franco-Germany, German Mountain range, hill range in the German state of Rhineland-Palatinate and the French departments of France, departments of Bas-Rhin and Moselle (department), Moselle. It is formed from the southern part of the Palatine Forest and the northern part of the Vosges, Vosges mountains, and extends from the River Queich in the north over the French border to the Col de Saverne in the south. The highest hill in the entire Wasgau is the Grand Wintersberg (581 m above Normalhöhennull, NHN) near Niederbronn-les-Bains in northern Alsace. Next, at 577 m is the only slightly lower Rehberg (Wasgau), Rehberg near Annweiler am Trifels, Annweiler in the South Palatinate, which is the highest summit on German soil in the Wasgau. The Wasgau forms the southern part of the Palatine Forest-North Vosges Biosphere Reserve. Geography Location The Wasgau runs from a line between Pirmasens and Landau in der Pfalz, Landau in the north that, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Werneuchen
Werneuchen () is a town in Brandenburg, Germany, in the district of Barnim northeast of Berlin within the metropolitan area. Most of the population of Werneuchen commutes to Berlin. History From 1815 to 1947, Werneuchen was part of the Prussian Province of Brandenburg, from 1947 to 1952 of the State of Brandenburg, from 1952 to 1990 of the East German Bezirk Frankfurt and since 1990 again of Brandenburg. Demography File:Bevölkerungsentwicklung Werneuchen.pdf, Development of Population since 1875 within the Current Boundaries (Blue Line: Population; Dotted Line: Comparison to Population Development of Brandenburg state; Grey Background: Time of Nazi rule; Red Background: Time of Communist rule) File:Bevölkerungsprognosen Werneuchen.pdf, Recent Population Development and Projections (Population Development before Census 2011 (blue line); Recent Population Development according to the Census in Germany in 2011 (blue bordered line); Official projections for 2005-2030 (yell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Altomünster
Altomünster is a Municipalities in Germany, municipality in the district of Dachau (district), Dachau in Bavaria in Germany. Geography Geographical location The market is located northwest of Dachau and almost in the middle of the triangle formed by the cities of Munich, Augsburg and Ingolstadt. The village lies on the DAH 2 state road. The Stumpfenbach ditch flows through Altomünster, which flows into the Zeitlbach. Municipal structure Markt Altomünster is organised into the following 48 villages: Altomünster, Arnberg, Asbach, Breitenau, Deutenhofen, Erlach, Erlau, Freistetten, Haag, Halmsried, Hohenried, , Humersberg, Hutgraben, Irchenbrunn, , Lauterbach, Lichtenberg, Maisbrunn, Obererlach, Oberndorf, Oberschröttenloh, , Ottelsburg, Ottmarshausen, Pfaffenhofen, , Plixenried, Radenzhofen, Rametsried, , Reichertshausen, Röckersberg, Rudersberg, , Schauerschorn, Schielach, Schloßberg, Schmarnzell, Schmelchen, Sengenried, , Teufelsberg, , Übelmanna, , and Xyger. Histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berlin Zoo
The Berlin Zoological Garden (, ) is the oldest surviving and best-known zoo in Germany. Opened in 1844, it covers and is located in Berlin's Tiergarten. With about 1,380 different species and over 20,200 animals, the zoo presents one of the most comprehensive collections of species in the world. The zoo and its aquarium had more than 3.5 million visitors in 2017. It is the most-visited zoo in Europe and one of the most popular worldwide. Regular animal feedings are among its most famous attractions. Globally known animals like Knut, the polar bear, and , the giant panda have contributed to the zoo's public image. The zoo collaborates with many universities, research institutes, and other zoos around the world. It maintains and promotes European breeding programmes, helps safeguard several endangered species, and participates in several species reintroduction programs. History Opened on 1 August 1844, the Zoologischer Garten Berlin was the second zoo in Germany after th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoo Tower
The Zoo flak tower (German: ''Flakturm Grosser Tiergarten, Tiergarten'', ''Tiergarten Flak Tower'' or commonly referred to as the "Zoo Tower") was a fortified flak tower that existed in Berlin from 1941 to 1947. It was one of several flak towers that protected Berlin from Bombing of Berlin during World War II, Allied bomber raids. Its primary role was as a gun platform to protect the government building district of Berlin; in addition, the ''Hochbunker'' (blockhouse) was designed to be used as a civilian air-raid shelter. It also contained a hospital and a radio transmitter for use by the German leadership and provided secure storage facilities for art treasures. During the Battle of Berlin, it acted as a citadel and by depressing its large anti-aircraft artillery, its garrison was able to provide support for ground operations against the Soviet Red Army. Development The Berlin flak towers (''Flaktürme'', singular ''Flakturm'') were originally built as a response to an attack ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flak
Anti-aircraft warfare (AAW) is the counter to aerial warfare and includes "all measures designed to nullify or reduce the effectiveness of hostile air action".AAP-6 It encompasses surface-based, subsurface ( submarine-launched), and air-based weapon systems, in addition to associated sensor systems, command and control arrangements, and passive measures (e.g. barrage balloons). It may be used to protect naval, ground, and air forces in any location. However, for most countries, the main effort has tended to be homeland defense. Missile defense is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight. Most modern anti-aircraft (AA) weapons systems are optimized for short-, medium-, or long-range air defence, although some systems may incorporate multiple weapons (such as both autocannons and surface-to-air missiles). 'Layered air defence' usually refers to multiple 'tiers' of air defence systems which, when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone
A telephone, colloquially referred to as a phone, is a telecommunications device that enables two or more users to conduct a conversation when they are too far apart to be easily heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via Electrical cable, cables and other communication channels to another telephone which reproduces the sound to the receiving user. The term is derived from and (, ''voice''), together meaning ''distant voice''. In 1876, Alexander Graham Bell was the first to be granted a United States patent for a device that produced clearly intelligible replication of the human voice at a second device. This instrument was further developed by many others, and became rapidly indispensable in business, government, and in households. The essential elements of a telephone are a microphone (''transmitter'') to speak into and an earphone (''receiver'') which reproduces the voice a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaff (radar Countermeasure)
Chaff, originally called Window or Düppel, is a Radar jamming and deception, radar countermeasure involving the dispersal of thin strips of aluminium, Metallizing, metallized glass fiber, or Metallised film, plastic. Dispersed chaff produces a large radar cross section intended to blind or disrupt radar systems. Modern military forces use chaff to distract Active radar homing, active radar homing missiles from their targets. Military aircraft and warships can be equipped with chaff dispensing systems for self-defense. During its Ballistic missile flight phases#Midcourse, midcourse phase, an intercontinental ballistic missile may release chaff along with its other Penetration aid, penetration aids. Contemporary radar systems can distinguish chaff from legitimate targets by measuring the Doppler shift, Doppler effect; chaff quickly loses speed after leaving an aircraft, and the resulting shift in wavelength of the radar return can be measured. To counter this, a chaff cloud can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Code
Morse code is a telecommunications method which Character encoding, encodes Written language, text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy. International Morse code encodes the 26 ISO basic Latin alphabet, basic Latin letters to , one Diacritic, accented Latin letter (), the Arabic numerals, and a small set of punctuation and procedural signals (Prosigns for Morse code, prosigns). There is no distinction between upper and lower case letters. Each Morse code symbol is formed by a sequence of ''dits'' and ''dahs''. The ''dit'' duration can vary for signal clarity and operator skill, but for any one message, once the rhythm is established, a beat (music), half-beat is the basic unit of time measurement in Morse code. The duration of a ''dah'' is three times the duration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
