Integrity monitoring for kinematic precise point positioning in open-sky environments with improved computational performance

doi:10.1088/1361-6501/ac5d75

NTSC-IR > 时间频率测量与控制研究室

	Integrity monitoring for kinematic precise point positioning in open-sky environments with improved computational performance
	El-Mowafy,Ahmed 1; Wang,Kan 2,3
	2022-05-05
发表期刊	Measurement Science and Technology
ISSN	0957-0233
卷号	33 期号:8
摘要	Abstract Positioning integrity monitoring (IM) is essential for liability- and safety-critical land applications such as road transport. IM methods such as solution separation apply multiple filters, which necessitates the use of computationally efficient algorithms in real-time applications. In this contribution, a new approach that significantly improves the computation time of the measurement update of the Kalman filter is presented, where only one matrix inversion is applied for all filters with measurement subsets. The fault detection and identification method and computation of the protection levels (PLs) are discussed. The computational improvement comes at the expense of a small increase in the PL. Test results for precise point positioning (PPP) with float ambiguities in an open-sky and suburban environment demonstrate the reduced computation time using the proposed approach compared to the traditional method, with 23%–42% improvement. The availability of IM for PPP, i.e. when the PL is less than a selected alert limit of 1.625 m, ranged between 92% and 99%, depending on the allowable integrity risk, tested at 10?5 and 10?6, and the observation environment.
关键词	GNSS precise point positioning integrity monitoring
DOI	10.1088/1361-6501/ac5d75
语种	英语
WOS记录号	IOP:mst_33_8_085004
出版者	IOP Publishing
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/13824
专题	时间频率测量与控制研究室
通讯作者	El-Mowafy,Ahmed
作者单位	1.School of Earth and Planetary Sciences, Curtin University, Perth, Australia 2.National Time Service Center, Chinese Academy of Sciences, Xi’an, People’s Republic of China 3.University of Chinese Academy of Sciences, Beijing, People’s Republic of China
推荐引用方式 GB/T 7714	El-Mowafy,Ahmed,Wang,Kan. Integrity monitoring for kinematic precise point positioning in open-sky environments with improved computational performance[J]. Measurement Science and Technology,2022,33(8).
APA	El-Mowafy,Ahmed,&Wang,Kan.(2022).Integrity monitoring for kinematic precise point positioning in open-sky environments with improved computational performance.Measurement Science and Technology,33(8).
MLA	El-Mowafy,Ahmed,et al."Integrity monitoring for kinematic precise point positioning in open-sky environments with improved computational performance".Measurement Science and Technology 33.8(2022).