VHF omni-directional range beacon 甚高频全向无线电信标
VOR VHF Onni-directional Range 甚高频全向信标
neutral directional range 空档方向范围
ODR Omni C Directional Range 全向无线信标
omni-directional range set 全向测距仪
very high frequency ommi-directional range 接收机
odr omni directional range 全向无线信标
radar figure of directional range 变程星形图
Directional Radio Range 特高频多向导航台 ; 无线电指向标
DVOR (Doppler VHF omni-directional Range) is one of the equipments most commonly used in today's civil aviation communications and navigation. It provides the perspective information for the aircraft.
（多普勒甚高频全向信标）是当今民航最为常用的通信导航设备之一，可以给民航飞行器提供角度信息。
On the bases of analyzing triangle wave form modulated LFM, the method of using DDR (Dual Channel Directional Doppler range) technique to eliminate the influence of speed to range is presented.
在分析三角波调制的线性调频信号的基础上，提出了用DDR技术消除速度对测距的影响方法。
But all directional variograms have good spatial structures in their range, and all their theoretical models are the Gauss models with nugget effect.
但在变程内具有显著的空间结构性特点，其各个方向上变异函数的理论模型均为具有块金效应的高斯模型。
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