We conclude that adoption of USB ranging and Doppler data in combination with VLBI delay and delay-rate data will improve the accuracy of orbit.
仿真的计算结果表明：采用USB 测距、测速和VLBI 时延，时延率联合定轨能够提高定轨和轨道预报精度。
The non-orbit target tracking needs large-scale tracking net. The tracking devices include large-scale ranging and doppler radar, optical theodolite etc. Such system is so large that its Cost of construction and maintenance is high.
非轨道飞行器跟踪需要大型的跟踪网，跟踪设备包括大型测距、测速雷达，光学经纬仪等，系统庞大，建设、维护成本高。
The system uses striped cosine and v calibrated lumen sensor bands installed on a vehicle to scan dynamically the luminous section of the airfield visual aid light within the level surface. The vehicle also has a Doppler ranging radar to measure the distance between the vehicle and lights, so it can compute the lighting intensity and then obtain the isocandela curve.
系统采用安装在车体上的经余弦校正和v校正的条形照度传感带在水平面内动态扫描助航灯光发光截面，利用车载多普勒测距雷达测量距离，计算相应的光强值，并进而获得等光强图。
The principle of direct sequence spread spectrum ranging is introduced and the echo model of near field ranging is discussed. A detailed analysis is made on the echo's Doppler spread and range spread caused by body target Spread, and on their influence on ranging.
论述了直接序列扩频测距的原理，研究了近距离测距的回波模型，从理论上分析了由于体目标引起的引信回波信号的多普勒展宽和距离展宽问题，以及它们对近距离扩频测距的影响。
The vehicle also has a Doppler ranging radar to measure the distance between the vehicle and lights, so it can compute the lighting intensity and then obtain the isocandela curve.
（）λ校正的条形照度传感带在水平面内动态扫描助航灯光发光截面，利用车载多普勒测距雷达测量距离，计算相应的光强值，并进而获得等光强图。
Passive ranging Doppler There are still many other energy sources in store.
无源测距多普勒雷达还有许多其他贮备能源。
In practice, the pseudo code ranging system usually use the spread spectrum communication mode in which the acquisition performance of PN code will be seriously affected by Doppler shift. In this case, it even cause the fault of Dispreading PN code.
在实际运用中，伪码测距系统多采取扩频通信的方式，多普勒频移对PN码的捕获性能有很大的影响，甚至造成不能正确解扩，所以在解调和解扩之前必须对其进行补偿。
The subject of this paper is the Doppler shift impact in pseudo-code ranging system and its capture and elimination methods.
本文研究的课题是伪码测距系统中多普勒频移的影响及其跟踪与补偿方法。
Because of the Doppler sensitivity of Pseudo-random code, the ranging ability of Pseudo_random code phase modulation fuse is significantly reduced when the speed between the bomb and the target is high.
由于伪码信号的多普勒敏感性，伪码调相连续波体制引信在弹目接近速度较大时定距性能大大降低，减少了伪码调相引信的应用范围。
A detailed analysis is made on the echo's Doppler spread and range spread caused by body target spread, and on their influence on ranging.
从理论上分析了由于体目标引起的引信回波信号的多普勒展宽和距离展宽问题，以及它们对近距离扩频测距的影响。