而最初用火箭来发射却干扰了回旋装置，而且无线电导航也缺乏其可靠性，原因是真空管在高度加速的情况下承受不了压力。
The initial launch using rockets upset the gyroscopes, and radio guidance was unreliable because vacuum tubes suffered under high acceleration.
商业飞行执照要求更灵活的掌握无线电导航及全球定位系统。
A commercial pilot's license requires you to learn how to use more sophisticated radio navigation and global positioning systems (GPS).
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。
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.
实现无线电导航系统的定位解算。
Then the positioning calculation can be realized for radio navigation system.
私人飞行执照要求掌握小型飞机的无线电导航。
A private pilot's license gives you training in visual and radio navigation of a small plane.
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。
It can be used in developing the short range radio navigation ground beacon and testing the performance of its transmitter.
一个无线电导航台帮助救援了三名被困于胡德山的登山者。他们被发现之前，依靠一只看门狗取暖，熬过了一个恶劣而又寒冷的夜晚。
An emergency radio beacon helped rescue three climbers on mount hood and a big dog kept them warm. the group endured a foul and a cold night before being found.
无线电导航是利用无线电电波的波速进行导航的方法，根据导航基点可分为陆基导航和空基导航。
Radio navigation makes use of wireless wave, which can be divided into land-based and space-based system according to the position of base point.
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。
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.
本文提出了采用单片机和数字滤波技术对一种港口双曲线无线电导航系统的相位信号进行滤波处理和巷识别的方案。
Scheme is proposed of using a computer on sline and digital filtering technique to perform digital filtering and lane identification of the phase signals of a port radio navigation system.
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。
Radio wave bending is caused by atmospheric refraction, which leads to the distance measured by radio navigation system different from the truth.
在体重尽可能通缉燃料，无线电导航仪器，乘客座位，或货物的房间，当然，乘客或货物本身。
Out of that weight as much as possible is wanted for fuel, radio navigational instruments, passenger seats, or freight room, and, of course, the passengers or freight themselves.
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。
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.
本文提出了采用单片机和数字滤波技术对一种港口双曲线无线电导航系统的相位信号进行滤波处理和巷识别的方案。
A Scheme is proposed of using a computer on sline and digital filtering technique to perform digital filtering and lane identification of the phase signals of a port radio navigation system.
本文全面扼要地介绍了国外现行的各种无线电导航定位系统，并就各系统的优缺点及今后的发展趋势进行评述。
Various radio navigation systems abroad are introduces in this paper. An overview on the advantage and disadvantage of these systems as well as the trend of development is also presented.
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。
The theory of the realization of global position system(GPS) receiver is studied in this paper, and the simple mathematical model is also introduced.
无线电导航是所有导航手段中最重要的一种。
Wireless navigation is the one of important navigation means.
考虑利用载波相位进行测距的扩频无线电导航系统，该文提出了一种基于导引符号的两导航台载波差分相位的提取方法。
Considering the spread spectrum orientation systems using difference carrier phase to measure distance, this paper proposed a method for acquiring difference carrier phase by using pilot symbol.
飞机上的一种无线电导航设备，通过测量电波往返飞机和预选地面（DME）台之间所需要的时间来确定两者间的距离。
A radio navigational aid for determining the distance from a selected DME ground station by measuring the time of transmission to and from it.
就特定海域分析和计算了大气噪声的功率谱密度，同时计算了在保证较高测量精度条件下所需要的最低场强，继而给出了无线电导航系统所需辐射功率的计算方法。
Radiant power of atmospheric radio noise and electric field intensity is computed precisely for given maritime space, and then the computational way of radiant power is given.
就特定海域分析和计算了大气噪声的功率谱密度，同时计算了在保证较高测量精度条件下所需要的最低场强，继而给出了无线电导航系统所需辐射功率的计算方法。
Radiant power of atmospheric radio noise and electric field intensity is computed precisely for given maritime space, and then the computational way of radiant power is given.
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