Global Positioning system (GPS) is a radio navigation system which provides free users with accurate longitude, latitude and elevation of three-dimensional position information and time information.
全球定位系统(GPS)是为用户提供免费而精确的经度，纬度和海拔三维位置信息与时间信息的无线电导航系统。
Then the positioning calculation can be realized for radio navigation system.
实现无线电导航系统的定位解算。
It can be used in developing the short range radio navigation ground beacon and testing the performance of its transmitter.
该平台可在近程无线电导航地面导航设备的研制中确定发射机参数和检验性能时使用。
Radio wave bending is caused by atmospheric refraction, which leads to the distance measured by radio navigation system different from the truth.
大气折射效应会引起无线电传播路径发生弯曲，使得无线电导航定位系统中测量到的距离与真实值有一定的误差。
Based on the spread spectrum communication theory, combine digital signal-processing chip DSP and FPGA, this article researches and designs the receiver system for regional radio navigation.
本课题以扩频通信为理论基础，结合目前广泛使用的数字信号处理芯片DSP和FPGA，研究了区域无线电导航系统接收机数字信号处理平台。
At ancient times, people were navigated by means of sun, fixed stars, etc., while currently the common navigation systems are astronomic navigation, inertial navigation and radio navigation.
以前，人们主要利用太阳、星星等自然天体。现在人们利用的导航系统主要有：天文导航系统、惯性导航系统、无线电导航系统三大类。
Theory, operating features and interface relations of three correction modes for the inertial navigation; Short-Range Radio Navigation, Long-Range Radio Navigation and Visual, are presented.
从校正方式组成及原理入手，详细地介绍了某型飞机导航系统惯导几种校正方式的使用特点及相互交联关系。
Products can be widely used in microwave communications, satellite ground stations, radio, navigation, radar and other fields.
产品可广泛应用于微波通信、卫星地面站、广播、导航、雷达等领域。
Products can be widely used in microwave communications, satellite ground stations, radio, navigation, radar and other fields.
产品可广泛应用于微波通信、卫星地面站、广播、导航、雷达等领域。
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