摘要
伪距测量精度决定了伪距定位的精度。伪距测量值主要由卫星至用户机的真实距离、卫星钟差、大气传播延迟、用户机钟差、用户机通道延迟以及用户机跟踪环路误差组成。提出了伪距测量精度的三种评定方法。详细推导了如何通过数据仿真将伪距观测值中的用户机跟踪环路误差与其他误差进行分离,将得出的数据用于评定计算以获得伪距测量精度。最后通过算例,证明了方法的可行性,并分析了这三种方法的优缺点。
The precision of pseudo-range measurement determines the precision of pseudo-range positioning. Pseudo-range measurements mainly consist of real range from satellite to User Equipment （ UE）, satellite clock error, atmospheric delays, UE clock error, UE channel delays and UE tracking error. Three evaluation methods of ranging accuracy are suggested in this paper. How to isolate UE tracking error rjom other errors by data simulating and how to use the result of error-isolating to assess the precision of pseudo-range measurement have been particularly deduced. And by analyzing examples, the feasibility of the evaluation methods have been proved. The advantages and disadvantages of these three evaluation methods also have been analyzed.
出处
《海洋测绘》
2008年第5期35-38,共4页
Hydrographic Surveying and Charting
关键词
卫星导航
伪距测量精度
用户机跟踪环路误差
精度评定
satellite navigation
precision of pseudo-range measurement
UE tracking error
precision evaluation
