GPS中英文翻译--全球定位系统概述

本科毕业设计（论文）中英文对照翻译

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2010年06月11日

Summarizing The Global Positioning System Abstract:Global Positioning System is based on the background of the United States

Department of Defense.It is designed,invested,developed,and operated by the United States Department of Defense ,GPS is a satellite-based positioning and time transfering GPS positioning function has a wide range of applications in the modern measurement and a more modern building.GPS-RTK technology is also widely used in modernization building, and now GPS has also been shown to be an important civilian communities of interest, and increasingly wide range of applicated.

Keyword:GPS,Locating，RTK，Lay out，Survey

1.Background

The 50s, the former U.S.S.R has not launched humanities first artificial earth

satellite, the American scientists in along its track research in, had discovered the

Doppler shift phenomenon, and has facilitated Doppler satellite navigation posi- tioning

system completing using this principle, has obtained the enormous success in the

military and the civi aspect, was in a navigation localization history leap, our country

once has also introduced many Doppler receiver, applied to the island association

measured, the Earth explored and so on the applied to the island association measured,

the Earth explored and so on the domain. But because Doppler satellite orbit highly low,

signal-carrier frequency low, the track precision enhances with difficulty, causes the

pointing accuracy lowly, satisfies the geodetic survey or the project survey request, is

more impossible to use in the astronomy Earth dynamics research. In order to enhance

the satellite positioning the precision,US started from 1973 to prepare for construction

global positioning system GPS (Global Positioning System).After has entered the plan

proof, the system test stage,started in 1989 to launch the official work satellite,and

completely completed in 1994, investment use. The GPS system spaceartially is

composed by twenty one satellites, evenly distributes in six orbit, the ground level is

20,000 Kilometers, the inclination of orbit is 55, the flat heart rate approximately is 0,

the week contract is 12 hours, the satellite to the earth launching two wave bands

intelligence signals,the intelligence signal frequency respectively is 1575.442 mega

cycles per second (the L2 wave band), on the satellite has installed the precision very