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Tellurometer Model M RA 1
The tellurometer was the first successful microwave electronic distance measurement equipment. The name derives from the Latin ''tellus'', meaning Earth. History The original tellurometer, known as the Micro-Distancer MRA 1, was introduced in 1957. It was invented by Trevor Wadley of the Telecommunications Research Laboratory of the South African Council for Scientific and Industrial Research (CSIR). He was also responsible for the Wadley Loop receiver, which allowed precision tuning over wide bands, a task that had previously required switching out multiple crystal oscillators. Principle The tellurometer emits a microwave-frequency radio wave. The remote station carries a transponder that reradiates the incoming wave in a similar wave of more complex modulation. The resulting phase shift is a measure of the two-way distance travelled. The results appear on a cathode ray tube with circular sweep. Application The tellurometer design yields high accuracy distance measurements o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tellurometer Model M RA 1
The tellurometer was the first successful microwave electronic distance measurement equipment. The name derives from the Latin ''tellus'', meaning Earth. History The original tellurometer, known as the Micro-Distancer MRA 1, was introduced in 1957. It was invented by Trevor Wadley of the Telecommunications Research Laboratory of the South African Council for Scientific and Industrial Research (CSIR). He was also responsible for the Wadley Loop receiver, which allowed precision tuning over wide bands, a task that had previously required switching out multiple crystal oscillators. Principle The tellurometer emits a microwave-frequency radio wave. The remote station carries a transponder that reradiates the incoming wave in a similar wave of more complex modulation. The resulting phase shift is a measure of the two-way distance travelled. The results appear on a cathode ray tube with circular sweep. Application The tellurometer design yields high accuracy distance measurements o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surveying
Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. A land surveying professional is called a land surveyor. These points are usually on the surface of the Earth, and they are often used to establish maps and boundaries for ownership, locations, such as the designed positions of structural components for construction or the surface location of subsurface features, or other purposes required by government or civil law, such as property sales. Surveyors work with elements of geodesy, geometry, trigonometry, regression analysis, physics, engineering, metrology, programming languages, and the law. They use equipment, such as total stations, robotic total stations, theodolites, GNSS receivers, retroreflectors, 3D scanners, LiDAR sensors, radios, inclinometer, handheld tablets, optical and digital levels, subsurface locators, d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, and many smaller islands within the British Isles. Northern Ireland shares a land border with the Republic of Ireland; otherwise, the United Kingdom is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. The total area of the United Kingdom is , with an estimated 2020 population of more than 67 million people. The United Kingdom has evolved from a series of annexations, unions and separations of constituent countries over several hundred years. The Treaty of Union between the Kingdom of England (which included Wales, annexed in 1542) and the Kingdom of Scotland in 170 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plessey
The Plessey Company plc was a British electronics, defence and telecommunications company. It originated in 1917, growing and diversifying into electronics. It expanded after World War II by acquisition of companies and formed overseas companies. It was listed on the London Stock Exchange and was a constituent of the FTSE 100 Index. In 1989, it was taken over by a consortium formed by GEC and Siemens which split the assets of the Plessey group. The majority of Plessey's defence assets were amalgamated into BAE Systems in 1999 when British Aerospace merged with the defence arm of GEC, Marconi Electronic Systems (MES). A small portion of the defence market, mostly embedded electronic systems and circuitcards remained with GE, formerly GE Fanuc and GE Intelligent Platforms (GE-IP) and now Abaco Systems based in Huntsville, Alabama, and in Towcester, Northamptonshire. The bulk of Plessey's telecommunications assets were acquired by Ericsson through its 2005 acquisition of Marconi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Army Of The Republic Of Vietnam
The Army of the Republic of Vietnam (ARVN; ; french: Armée de la république du Viêt Nam) composed the ground forces of the Republic of Vietnam Military Forces, South Vietnamese military from its inception in 1955 to the Fall of Saigon in April 1975. It is estimated to have suffered 1,394,000 casualties (killed and wounded) during the Vietnam War. The ARVN began as a postcolonial army that was Military Assistance Advisory Group, trained by and closely affiliated with the United States and had engaged in conflict since its inception. Several changes occurred throughout its lifetime, initially from a 'blocking-force' to a more modern War in Vietnam (1959–63)#Republic of Vietnam strategy, conventional force using Air assault, helicopter deployment in combat. During the American intervention, the ARVN was reduced to playing a defensive role with an incomplete modernisation, and transformed again following Vietnamization, it was upgeared, expanded, and reconstructed to fulfill the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrographic Survey
Hydrographic survey is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, offshore oil exploration/offshore oil drilling and related activities. Strong emphasis is placed on soundings, shorelines, tides, currents, seabed and submerged obstructions that relate to the previously mentioned activities. The term ''hydrography'' is used synonymously to describe ''maritime cartography'', which in the final stages of the hydrographic process uses the raw data collected through hydrographic survey into information usable by the end user. Hydrography is collected under rules which vary depending on the acceptance authority. Traditionally conducted by ships with a sounding line or echo sounding, surveys are increasingly conducted with the aid of aircraft and sophisticated electronic sensor systems in shallow waters. Organizations National and International Maritime Hydrography Hydrographic offices evolved from n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vogt Peak
During the Middle Ages, an (sometimes given as modern English: advocate; German: ; French: ) was an office-holder who was legally delegated to perform some of the secular responsibilities of a major feudal lord, or for an institution such as an abbey. Many such positions developed, especially in the Holy Roman Empire. Typically, these evolved to include responsibility for aspects of the daily management of agricultural lands, villages and cities. In some regions, advocates were governors of large provinces, sometimes distinguished by terms such as (in German). While the term was eventually used to refer to many types of governorship and advocacy, one of the earliest and most important types of was the church advocate (). These were originally lay lords, who not only helped defend religious institutions in the secular world, but were also responsible for exercising lordly responsibilities within the church's lands, such as the handling of legal cases which might require the u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen Elizabeth Range (Antarctica)
The Queen Elizabeth Range is a rugged mountain range of the Transantarctic Mountains System, located in the Ross Dependency region of Antarctica. It parallels the eastern side of Marsh Glacier for nearly from Nimrod Glacier in the north to Law Glacier in the south. Mount Markham (4,350 m), is the highest elevation in the range. Named by J.H. Miller of the New Zealand party of the Commonwealth Trans-Antarctic Expedition (1956–58) who, with G.W. Marsh, explored this area. It was named for Queen Elizabeth II, the patron of the expedition. Geological features Mount Bonaparte Mount Bonaparte () is a mountain, high, standing 4 mi NW of Mount Lecointe. Discovered by the British Antarctic Expedition (1907–09) under Shackleton, and named for Prince Roland Bonaparte, President of the Société de Géographie of Paris from 1910-1924. Inaccessible Cliffs Inaccessible Cliffs () is a line of steep cliffs, interrupted by several glaciers, which form the northern escarpment o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Summerson
Summerson is a surname. Notable people with the surname include: * Hugo Summerson (born 1950), British politician * John Summerson (1904–1992), English architectural historian See also * Mount Summerson, mountain surmounting the northern end of Endurance Cliffs in the Geologists Range of Antarctica {{surname ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Predoehl
Mount is often used as part of the name of specific mountains, e.g. Mount Everest. Mount or Mounts may also refer to: Places * Mount, Cornwall, a village in Warleggan parish, England * Mount, Perranzabuloe, a hamlet in Perranzabuloe parish, Cornwall, England * Mounts, Indiana, a community in Gibson County, Indiana, United States People * Mount (surname) * William L. Mounts (1862–1929), American lawyer and politician Computing and software * Mount (computing), the process of making a file system accessible * Mount (Unix), the utility in Unix-like operating systems which mounts file systems Displays and equipment * Mount, a fixed point for attaching equipment, such as a hardpoint on an airframe * Mounting board, in picture framing * Mount, a hanging scroll for mounting paintings * Mount, to display an item on a heavy backing such as foamcore, e.g.: ** To pin a biological specimen, on a heavy backing in a stretched stable position for ease of dissection or display ** T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Albright
Albright may refer to: *Albright (surname) *Albright, Alberta, Canada *Albright, West Virginia, United States *Albright College, a liberal arts college located in Reading, Pennsylvania, United States *Albright–Knox Art Gallery, Buffalo, New York, United States *Albright Memorial Building, Scranton, Pennsylvania, United States *Albright special The Albright special The complete guide to knots and knot tying — Geoffrey Budworth — p.70 — or Albright knot is a bend used in angling. It is a strong knot used to tie two different diameters of line together, for instance to tie monofil ..., a knot See also * Allbright, Missouri, United States {{disambiguation, geo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacobsen Glacier
Jacobsen Glacier () is a glacier flowing east-northeast from Mount Reid, in the Holland Range, Antarctica, into the Ross Ice Shelf. It was mapped by the United States Geological Survey from Tellurometer surveys (1961–62) and Navy air photos (1960), and was named by the Advisory Committee on Antarctic Names for H. Jacobsen, Master of the during U.S. Navy Operation Deep Freeze Operation Deep Freeze (OpDFrz or ODF) is codename for a series of United States missions to Antarctica, beginning with "Operation Deep Freeze I" in 1955–56, followed by "Operation Deep Freeze II", "Operation Deep Freeze III", and so on. (There w ... 1964 and 1965. References Glaciers of the Ross Dependency Shackleton Coast {{ShackletonCoast-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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