A correction algorithm of constellation rotation error in autonomous navigation using ground stations

被引：0

作者：

Du, Yujun ^{[1
,2
]}

Wang, Fuhong ^{[1
]}

Wang, Zemin ^{[2
]}

Liu, Wanke ^{[1
]}

机构：

[1] School of Geodesy and Geomatics, Wuhan University, Wuhan

[2] Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan

来源：

Wuhan Daxue Xuebao (Xinxi Kexue Ban)/Geomatics and Information Science of Wuhan University | 2015年 / 40卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Autonomous navigation; Constellation rotation; Correction algorithm; Navigation satellites;

D O I：

10.13203/j.whugis20140506

中图分类号：

学科分类号：

摘要：

Constellation rotation will inevitably occur when navigation satellites operated in autonomous navigation (AutoNav) mode using inter-satellite ranging measurements. It will reduce ephemeris accuracy and cause systematic errors in users' positioning. This paper quantifies the constellation rotation error and its effects. The analysis indicates that the major sources of rotation error, which mainly cause constellation rotation about the earth's axis (Z-axis), are longitudes of ascending nodes bias (ΔΩ) and earth orientation parameters (EOP) prediction errors. On this basis, this paper presents a correction algorithm for estimating and eliminating the rotation error by using pseudo-range measurements from regional ground stations. It can be established easily and independently of the AutoNav system. Simulation results show that: 1) all three components of the rotation can be estimated and eliminated by using two stations base on this algorithm, greatly improving positioning accuracy; 2) with only one single station and considering only the Z-axis component of the rotation, the algorithm is still effective and errors can be corrected with a slightly reduced performance. ©, 2015, Wuhan University. All right reserved.

引用

页码：534 / 539

页数：5

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