Many government departments are already making use of mobile devices , which are often equipped with geographic information system and global positioning system , to enhance the productivity of their field operation 多个政府部门亦已利用流动通讯装置（通常装有地理信息系统和全球卫星定位系统） ，以提高户外工作的效率。
Many government departments are already making use of mobile devices , which are often equipped with geographic information system and global positioning system , to enhance the productivity of their field operation 多个政府部门亦已利用流动通讯装置（通常装有地理信息系统和全球卫星定位系统） ，以提高户外工作的效率。
Researchers at oxford university spent 10 years studying homing pigeons using global positioning satellite ( gps ) and were stunned to find the birds often don ' t navigate by taking bearing from the sun 牛津大学的研究者们花了十年的时间用全球卫星定位系统来研究信鸽。他们惊讶地发现信鸽飞行时往往不是通过太阳来辨别方向的。
" we have followed the akagera river system to its longest point up in the nyungwe forest and it ' s this point that we now finally know as being the longest source of the river nile , " mcgrigor told reuters 这支探险队还运用全球卫星定位系统对尼罗河总长进行了他们认为该河的实际长度至少要比以前人们所认为的数字多出107公里。
This paper introduces the structure and the working principle of continuous operational reference system , and gains the inside precision and outside precision through test and computing 摘要介绍了连续运行卫星定位系统的组成及工作原理，通过连续运行24小时的稳定性测试和利用静态点的内、外符合精度测试，得出了该系统数据丢失率和内、外符合精度。
Chapter 1 is the preface , which concisely introduces the development of the satellite navigation 、 classification of satellite navigation system and gps interference technology . the framework of this dissertation is also introduced at the end 第一章是绪论,介绍了卫星定位技术的发展概况以及卫星定位系统的分类,同时也介绍了gps干扰对抗技术。
As a new technology , gps ( globe position system ) has remarkable advantages of high precision , great speed and low cost . it has a great potential in vehicle navigation , system position , monitor and dispatch 作为一种新的技术， gps全球卫星定位系统具有精度高、速度快、成本低的显著优点，在汽车引导、系统定位、监控、指挥调度方面有着极大的潜力。
