satellite-based navigation

Application Analysis of Circle Orbit Synchronous Satellite in Regional Navigation System

圆轨道同步卫星在区域导航系统中应用研究

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On Labor Day, in 1973, a dozen military officials furtively gathered in an office of a deserted Pentagon building in Washington DC to discuss a new global satellite-based navigation system.

1973年美国劳动节那天，12名军官在美国华盛顿特区五角大楼一栋废弃建筑的一间办公室里秘密开会，讨论一种新的全球卫星导航系统。

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With the development of Information Technology and space navigation technology, especially the micro-miniaturization, speediness and automation of satellite communication, scouting the flying project, remote sensing and measuring and astronomic observation antenna system, more hard requirements are demanded on precision transmission.

随着信息和宇航科学技术的发展，特别是卫星通信、飞行目标跟踪与拦截、遥感与遥测、天文观察等天线系统的微小型化、快速化及自动化，对精密传动提出了更高的要求。

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Radio and satellite-based navigation systems have greatly reduced the need for large lighthouses in sighting land.

无线电和卫星导航系统已大为降低了对在可视陆地范围内建大型灯塔的需要.

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Star sensor is an excellent part for measuring satellite attitude in the space navigation.

星敏感器在天文导航中优良的空间姿态测量部件。

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This paper introduces some knowledge related to the space field such as the weather satellite, typhoon, communication satellite, satellite remote sensing, satellite navigation positioning, space observation, and manned space flight, etc.

介绍了气象卫星、飓风与台风、通信卫星、卫星遥感、卫星导航定位、空间观测、载人航天等空间领域的有关知识。

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The satellite navigation signal simulator, as a high-precise standard signal source, can generate such satellite navigation signals as GPS, GLONASS and galileo and provide a simulation environment for the development and test of navigation receiver.

卫星导航信号模拟器是一种高精度的标准信号源，可以产生卫星导航信号（GPS、GLONASS、Galileo等），为导航接收机的研制开发、测试提供仿真环境。

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Currently, the satellite timing technology can be achieved by relying on the U.S. global satellite navigation system ( GPS), the Russian Global Navigation Satellite System ( GLONASS) or the Chinese Compass Navigation Satellite System ( COMPASS).

目前的卫星授时技术可以依靠美国的全球卫星导航系统（GPS）、俄罗斯的全球导航卫星系统（GLONASS）、中国的北斗卫星导航系统（COMPASS）来实现。

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This paper briefly introduces the basic performances of Chinese Plough Satellite Navigation Positioning System, Russian Satellite Positioning System, American Satellite Navigation Global Positioning System ( GPS) and European Galilean System.

简要介绍了中国的北斗卫星导航定位系统、俄罗斯的卫星定位系统、美国的全球卫星导航定位系统（GPS）及欧洲的伽利略系统的基本性能。

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Nations are also pressing ahead with space research and satellite projects to expand their global navigation abilities.

各国继续进行航天研究和卫星项目来扩展他们全球导航的能力。

六级真题- 2016年 12月 2卷 信息匹配

Meanwhile, the short term values of Earth Orientation Parameters, which cannot be obtained in real time, are needed for applications such as satellite navigation and deep space exploration. So, it is necessary to predict the Earth Orientation Parameters in short term.

同时，卫星导航、深空探测等实际应用需要高精度的地球定向参数短期变化值，而该变化值难以实时获取，因而有必要对地球定向参数进行短期的预报。

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Global navigation satellite system ( GNSS) refers to a kind of space navigation technology for navigation and positioning on the ground, sea and space using in the sky of the navigation satellite.

全球导航卫星系统GNSS（Global Navigation Satellite System），是指利用在天空中的导航卫星对地面、海洋和空间用户进行导航定位的一种空间导航技术。

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GPS-Global Positioning System-A satellite-based navigation unit that can be accurate to 10 m.

全球定位系统一套以卫星做为定位系统的导航装备精确度可达十公尺.

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