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- Minimal Doppler Navigator 最低限度多普勒(导航)导航仪
- Design of the Doppler navigation system. 水下航行器的多普勒导航系统设计。
- Abstract: Doppler navigation is a kind of independent navigational system, but its real-time speed measuring precision is comparatively low. 文摘:多卜勒导航是一种自主式的导航系统，但其实时测速精度较低。
- This method is used to calculate the minimum working altitude of AN-APN-220C Doppler navigation radar. 推导出最小起量高度的简捷而实用的计算方法;用此方法计算了AN-APN220C多普勒雷达的最小起量高度.
- Secondly, we expatiate the essential theory of Doppler navigation,then analyze each module of the radar and study work principle and signal process. 其次,阐述多普勒导航的基本原理,并对本雷达的各个模块进行分析,研究其工作原理和信号流程,以便其后的测试系统的组建。
- After deeply studying the working principal of supersonic Doppler and electrical compass, We design the Doppler navigation system. 详细研究了声波多普勒测速仪、电罗经工作原理，设计了多普勒导航系统，针对多普勒输出数据周期长和周期时变编写了导航计算程序，进行了数字仿真和实物工作测试，对实测数据进行分析及误差补偿，仿真和实测结果表明该系统具有很高的导航精度；
- Doppler navigation is a kind of independent navigational system, but its real time speed measuring precision is comparatively low. 多卜勒导航是一种自主式的导航系统 ,但其实时测速精度较低。
- We treated the GPS data by Kalman filter to improve the position precision, and the result is adopted to deal with ADF and Doppler Navigation System precision estimating. 本文对GPS的数据采用卡尔曼滤波方法处理，并将该方法应用于实际飞行对无线电罗盘、多普勒导航系统的定向、定位精度考核。
- This paper analyses in detail the signal relation of Doppler navigation radar altitude system which adopts automatic cycle calibration technique during self calibration. 本文详细分析了采用周期自动校准技术的多普勒导航雷达测高装置自校时的信号关系。
- The man is a sixteenth Spanish navigator. 那个人是十六世纪的航海家。
- The possibility that the pulsed Doppler radar is used as the navigation sensor is analysed ,and two kinds of ways how to use this radar as Doppler navigation sensor are described in this paper. 分析了采用脉冲多普勒雷达作为导航传感器的可能性，并说明了将这种雷达用作多普勒导航传感器的两种方法。
- A simple inertial or Doppler navigation has a common defect that position errors are always increasing with flight time or distance, therefore an external reference system is necessary. 纯惯性导航或多普勒导航的一个共同缺点是:一般都具有随时问或距离增长的位置误差,这就需要有一个外基准系统。
- A virtual instrument based integrated measurement system for Doppler navigation radar is developed. Using direct digital synthesis(DDS)technique,a kind of radar Doppler frequency simulator is introduced. 分析了机载四波束多普勒测速雷达的工作原理,采用直接数字频率合成(DDS)技术进行多普勒频移模拟器的设计,通过数字控制,该模拟器可以产生高分辨率的多普勒频率信号；
- The state equation and error analysis of SINS combined with globe positioning system (GPS) and Doppler navigation system (DNS) were also presented. The simulation in certain condition was made. 给出了SINS与全球卫星定位系统(GPS)、多普勒导航系统(DNS)组合导航系统的状态方程和误差分析,在给定条件下进行了仿真试验。
- We stayed with friends, so our expenses were minimal. 我们住在朋友家，所以我们的花费很小。
- Knowledge navigator: a slogan or towards reality? 知识导航员:滞于口号还是走向现实?
- Doppler Navigation Satellite System 多普勒导航卫星系统
- Fortunately, the storm only did minimal damage. 很幸运,暴风雨造成的破坏不大。
- underwater Doppler navigation system 水下多普勒导航系统
- Columbus was a famous navigator. 哥伦布是个有名的航海家。
