GPS外文翻译

来源：百度知道 编辑：UC知道 时间：2024/06/29 23:21:43
A GPS receiver operated by a user on Earth measures the time it takes radio signals to travel from four or more satellites to its location, calculates the distance to each satellite, and from this calculation determines the user's longitude, latitude, and altitude. The U.S. Department of Defense originally developed the Navstar constellation for military use, but a less precise form of the service is available free of charge to civilian users around the globe. The basic civilian service will locate a receiver within 10 metres (33 feet) of its true location, though various augmentation techniques can be used to pinpoint the location within less than 1 cm (0.4 inch). With such accuracy and the ubiquity of the service, GPS has evolved far beyond its original military purpose and has created a revolution in personal and commercial navigation. Battlefield missiles and artillery projectiles use GPS signals to determine their positions and velocities, but so do the U.S. space shuttle and

GPS接收机是位于地球上的用户测定所在位置经度、纬度和高程的设备，一台接收机是通过测量四颗或四颗以上卫星的无线电信号传输到用户位置所用时间来计算每个卫星到用户所在位置的距离，从从而进一步确定经度、纬度和高程的。美国国防部最初是出于军事目的开始对导航星系统的研发，但是全球的普通用户已经可以免费使用较低精度的接收设备了。一般用户设备的定位精度可以达到10米（33英尺），通过不财的技术手段可以将定位精度提高到1厘米（0.4英寸）以内。由于这种设备的精度和全天候特性，GPS的应用已经远远超出军事用途，在个人与商务导航领域引发了一场新的革命。战术导弹和巡航炮使用GPS信号测量它们的位置和速度，在美国的航天飞机、太空站也和商用喷气机、私人飞机一样使用该系统测量位置和速度。救援船、私家车、铁路运输等也象农场的拖拉机、跨越大洋的航班、徒步旅行都甚至是打高尔夫球的人也都受益于GPS定位。GPS的主机芯片只有婴儿的指甲那样的大小，所以可以装在手表、移动电话和个人数码助理里，所以许多GPS接收机比袖珍计算器还小，并且可以由一次性电池提供能量。

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