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鹤岗翻译公司关键字：space communications and greatly changed people's lives and ways of thinking.World in space technology and its industrial investment mainly concentrated in space communications. The end of 1999, there are 48 global satellite communications company operating about 200 commercial communications satellites, transponders with 5981, business competition is very fierce. Expected 2000-2009, the world will launch about 200 commercial communications satellites, satellite communications ground equipment market in 2006 will reach $ 46 billion. Approximately 160 countries around the world and regions about 900 satellite communication ground stations, satellite communications built our master 15, more than 20,000 types of satellite station. Formed a global communications network via satellite, worldwide television transmission and 60% of all transoceanic communications by the Space and Communications officer. Expected early 21st century, the world plans to launch satellite to over 1000, these satellites will be more advanced, more practical, including communications satellites, global positioning satellites and earth resources satellite is considered the most commercially promising.Satellite communications industry include: the fixed-satellite communications, mobile satellite communications, satellite TV broadcast / satellite digital audio broadcasting and satellite Internet access and other four industries.(3) Space NavigationSatellite navigation satellite technology and a successful application, thus forming a global involves many industries, military and civilian high-tech industries. Now almost all civil and military aircraft, part of the ship, the U.S. automobile use Global Positioning System (GPS) navigation receivers; satellite navigation applications include field survey, mapping, global plate tectonics, the earth level, the flood water, marine Shengjiang monitoring, communications networks and all need to use time synchronization position, velocity and time parameters of the scientific, engineering and social activities.U.S. GPS system, in addition with 24 navigation satellites sky, the ground product of ordinary GPS receiver, differential GPS receivers and high-precision geodetic-type GPS receiver. Positioning accuracy of GPS receivers from hundred meters to centimeters.
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