This paper presents and realizes a time domain detecting method to acquire HF Doppler frequency shift with high precision in real time by using echo s phase measurement and processing arithmetic aimed at the shortcoming of frequency domain detecting method.
针对电离层数字测高仪垂直探测中频域探测方法的不足,利用电离层回波信号相位测量分析和运算处理算法,开发并实现了一种时域探测方法,用于实时获取高精度高频多普勒频移信息。
A set of single Doppler velocity models are presented for low-level jets, and a rainstorm case in Anhui province is analyzed based on the 24th to 27th July 2000 observations of Doppler weather radar of Hefei.
结果表明 :不论风向如何变化 ,低空急流的多普勒正负速度区关于显示中心成对称分布 ,从多普勒速度的零速度线分布可以得到实际风场的风向廓线。
The intensity chart and Doppler velocity chart of typhoon rain band can be sounded byDoppler radar.
多普勒雷达能探测到台风雨带强度图和多普勒速度图（台风和热带风暴，本文统称为台风）。
The radial velocity distribution and Doppler width distribution of Gd metal atomic vapor heated by the liner electronic gun is measured by the dye double laser induced fllorescence.
采用双束激光诱导荧光法测量钆原子蒸气束的径向速度及其多普勒宽度分布。
The inversionless gain is realizable in Doppler-broadened media for a coupling field wavelength well in excess of probe field wavelength when the laser power is significantly less than the Doppler width, and stronger than that of media for the coupling field wavelength equal to the probe field wavelength.
对Λ型能级系统连续波无反转增益效应的研究表明 ,在耦合光的拉比频率小于多普勒宽度的情况下 ,多普勒加宽的非匹配能级系统 (耦合光波长λc 小于探测光波长λp)的无反转增益不仅存在 ,而且还强于匹配系统 (λc=λp)的无反转增益 ,文中从与无反转增益紧密联系的电磁感应透明 (EIT)的角度对这一现象作了解
In order to make up the shortcomings,this paper analyses the characteristic of a narrow pulse and ultra-wideband homing signals,and compares it with linear frequency modulation(LFM) signals in resolution rate,measuring precision,Doppler velocity tolerance and so on.
为弥补这一缺陷,文中分析了一种窄脉冲超宽带自导信号特性,通过与传统的调制类宽带信号在分辨性能、参数测量精度和多普勒速度容限等方面的比较分析,证明了窄脉冲超宽带信号具有较高的距离分辨率、较强的目标识别能力和较小的自导盲区。
According to the requirement of simulation of DVL,the theory of measuring velocity was studied.
随着声学测速精度的不断提高,声学多普勒速度仪已应用于多种载体的水下导航。
active Doppler velocity sensor
主动多普勒速度传感器
Fast deformation velocity measurement using laser Doppler velocity interferometer
应用激光多普勒速度干涉仪测量快速形变速度
DOPPLER VELOCITY ANALYSIS OF A TYPHOON HEAVY RAINFALL
一次台风暴雨的多普勒速度图像分析
Analysis of Doppler Velocity Feature on Snowstorm of Earlier Spring
初春暴雪过程的多普勒速度特征分析
Research and Realization of the Portable Doppler Velocity Tracking Apparatus
便携式多普勒速度跟踪仪的研究与实现
laser doppler velocity meter, laser doppler velocimeter
多普勒式激光速度计
Estimation Precision Improvement Method of Velocity Measurement for Doppler Radar
提高多普勒雷达测速估计精度的方法
Research on the Measurement of Burning Velocity by a Laser-doppler Anemometer (LDA)
用激光多普勒流速仪测量燃烧速度的研究
Measuring the precision of laser Doppler velocimeter based on counting
基于计数法测量激光多普勒测速仪的测速精度
The radial velocity and Doppler width distribution of belted atomic vapor are given.
给出原子束径向速度及其多普勒宽度分布。
Doppler two-color laser anemometer
多普勒双色激光风速计
Doppler velocity and position finder
多普勒测速和测位器
Doppler-shift ocean-current meter
多普勒频移海流测速仪
laser Doppler anemometry
激光多普勒风速测量法
Doppler Echocardiographyic Study of Mital Blood Flow in Human Fetuses
胎儿二尖瓣口血流速度的多普勒超声研究
Error analysis of speed reference system for ADL
多普勒计程仪速度参照系统的误差分析
A Speed Measuring, Device Using Single Transmitting Grating Doppler Effect
一种单透射光栅多普勒效应速度测量装置
Contactless Velocity Measurements of Vibration and Shock Using the Laser Doppler Method
非接触测量振动与冲击速度的激光多普勒方法