ACTA AERONAUTICAET ASTRONAUTICA SINICA >
PPP integrity monitoring algorithm for general-purpose navigation applications
Received date: 2022-08-08
Revised date: 2022-09-05
Accepted date: 2022-10-21
Online published: 2022-11-04
Supported by
National Key Research and Development Program(2021YFB3901300);National Natural Science Foundation of China(62003109);145 High-tech Ship Innovation Project sponsored by the Chinese Ministry of Industry and Information Technology;Heilongjiang Province Research Science Fund for Excellent Young Scholars(YQ2020F009);Fundamental Research Funds for Central Universities(3072019CF0401)
High precision and high reliability positioning for general-purpose mass navigation applications has become a research hotspot. Integrity monitoring of Precise Point Positioning (PPP) can provide tightly integrity guaranteed absolute position error bounds for safety-critical applications. However, due to the observation quality of low-cost receivers and the effects of local occlusion in the general-purpose navigation application environment, hazard misleading information will challenge the reliability of PPP and reduce the availability of integrity monitoring. In this paper, a solution separation-based integrity monitoring algorithm is proposed based on a single and dual frequency undifferenced and uncombined PPP model. By establishing a threat model for general-purpose navigation application scenarios to suppress dangerous misleading information. Meanwhile, observation data are used to improve satellite geometric distribution, so as to improve the availability of integrity monitoring. Finally, the static experiment based on low-cost ublox receiver and dynamic experiment under local occlusion environments are designed. The results show that the proposed algorithm can produce adequate protection level, which can form the tightly guaranteed position error bounds. Moreover, the proposed algorithm can effectively suppress misleading information in the dynamic local occlusion environment, and has higher availability.
Jie ZHANG , Lin ZHAO , Fuxin YANG , Zhiguo SUN , Liang LI . PPP integrity monitoring algorithm for general-purpose navigation applications[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(13) : 327904 -327904 . DOI: 10.7527/S1000-6893.2022.27904
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