Global positioning system, also called GPS, is a new generation of navigation positioning system.

全球定位系统，又称GPS，是新一代的导航定位系统。

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Error propagation characteristics caused by various error sources for navigation positioning, velocity and attitude are simulated on a digital computer.

同时对各主要误差源所引起的姿态、速度和导航定位误差的传播特性进行了模拟计算。

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Firstly, a series of reference systems, related to GPS navigation positioning system, such as timing system, reference frame and force model system, are discussed in detail.

本文详细地论述了与GPS导航定位系统一系列有关的参考系统：时间系统、坐标系统和力模型系统。

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It is launched initially by parachute, but as it deploys, the Inertial Navigation System and Global Positioning System take over.

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Maps and GPS (global positioning system) navigation in cars are very popular, and all of those maps came from one of just two mapmaking companies.

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Each onboard ADS-B set consists of a Global Positioning System satellite navigation unit, two Pentium microprocessors, some software and a radio transmitter-receiver--not much more gear than you would find behind the dash of a new Cadillac.

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