考虑码间频偏影响的GLONASS精确点定位

Zongpeng Pan, Hongzhou Chai, Yang Chong, Yulong Kong, Rui Wang, Xiaodong Pan
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引用次数: 2

摘要

当前的GLONASS星座使用频分多址(FDMA),这意味着不同卫星的代码观测存在频间偏差(IFB)。在进行精确点定位(PPP)时,伪距离残差中通常包含代码IFB。但是,当代码IFB的值较大时,会影响PPP的收敛。本文提出了一种考虑伪距离IFB影响的GLONASS PPP算法。给出了该算法在无电离层组合PPP和原始观测PPP下的统一模型。同时,通过GLONASS观测数据验证了该算法的有效性。结果表明,该算法能有效地减弱码间干扰的影响,考虑码间干扰的GLONASS PPP的收敛速度和残差分布优于传统方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
GLONASS precise point positioning considering the influence of code inter-frequency biases
The current constellation of GLONASS uses frequency division multiple access (FDMA), meaning the code observations of different satellites have inter-frequency biases (IFB). The code IFB is usually included in the pseudo-range residuals when performing precise point positioning (PPP). However, it will affect the convergence of PPP when the value of code IFB is large. In this contribution, a GLONASS PPP algorithm considering the influence of pseudo-range IFB is presented. The unified model of the algorithm in the ionosphere-free combination PPP and original observation PPP is given. At the same time, the validity of this algorithm is verified through the GLONASS observation data. The results show that the algorithm can effectively weaken the influence of the code IFB and the convergence speed and residual distribution of the GLONASS PPP considering the influence of code IFB is better than traditional method.
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