Spread-spectrum PN code ranging and differential Positioning technology are used to make it possible to reach such accuracy.
达到高精度的关键是应用了伪随机码扩谱及差分定位技术。
Also these methods a re analyzed and compared in the factual condition and a perfect pseudo noise code ranging method is educed. That is PN code ranging with on -board processing.
结合实际情况对这几种方法进行分析比较，在现有技术设备条件下得到了一种比较理想的伪随机码测距方法—星上处理伪随机码测距。
The algorithm is applicable to precise measuring of the PN code phase of satellite positioning signals and spread-spectrum ranging signals.
该算法的主要应用领域为卫星定位信号和直序扩频测距信号PN码相位的精确测量。
As the PN-code high performance of long period and the coherence, the very long distance and high precision ranging can be reached at the same time. Multi-target TT&C can be reached by CDMA of PN.
由于伪随机码固有的测距能力——其长周期和互相关特性，使得在测距距离和精度方面可以同时提高，采用码分多址技术可以实现对多个目标同时进行测控。
As the PN-code high performance of long period and the coherence, the very long distance and high precision ranging can be reached at the same time. Multi-target TT&C can be reached by CDMA of PN.
由于伪随机码固有的测距能力——其长周期和互相关特性，使得在测距距离和精度方面可以同时提高，采用码分多址技术可以实现对多个目标同时进行测控。
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