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A PPP Adaptive Stochastic Model for Low-Cost GNSS Receivers in Complex Environments
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Jianwen YAN1, Changsheng CAI1, 2, *, Minsi AO3, Chunhuaianwen CHEN3
Journal of Geodesy and Geodynamics | 2025, 45(3) : 297 - 302
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Journal of Geodesy and Geodynamics | 2025, 45(3): 297-302
A PPP Adaptive Stochastic Model for Low-Cost GNSS Receivers in Complex Environments
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Jianwen YAN1, Changsheng CAI1, 2, *, Minsi AO3, Chunhuaianwen CHEN3
Affiliations
  • 1 School of Geosciences and Info-Physics, Central South University, 932 South-Lushan Road, Changsha 410083, China
  • 2 State Key Laboratory of Geo-Information Engineering, 1 Mid-Yanta Road, Xi' an 710054, China
  • 3 Hunan Institute of Surveying and Mapping Technology, 693 Mid-Shaoshan Road, Changsha 410007, China

    • YAN Jianwen, postgraduate, majors in GNSS data processing and precise positioning, E-mail:

About Author:

YAN Jianwen, postgraduate, majors in GNSS data processing and precise positioning, E-mail:

Published: 2025-03-15 doi: 10.14075/j.jgg.2024.04.168
Outline
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We propose an adaptive stochastic model for low-cost receiver precise point positioning(PPP) in complex environments. The model improves PPP performance by adaptively adjusting the weight ratio of pseudorange observations and carrier phase observations of all GNSS satellites in a single epoch. We take the Hexinxingtong UM982 low-cost GNSS receiver to conduct PPP tests in three complex environments, including tree shade, high buildings and glass walls. The static PPP results show that the positioning accuracy of adaptive stochastic model is improved by 24%, 45% and 50% in three complex environments, respectively, and the convergence time is shortened by 49%, 27% and 24%, respectively, compared with the traditional empirical weighted stochastic model. The kinematic PPP results show that the positioning accuracy of adaptive stochastic model is improved by 35% in complex environment.

low-cost receiver  /  precise point positioning  /  adaptive stochastic model
闫健文, 蔡昌盛, 敖敏思, 陈春花. 一种复杂环境下低成本GNSS接收机PPP自适应随机模型. 大地测量与地球动力学, 2025 , 45 (3) : 297 -302 . DOI: 10.14075/j.jgg.2024.04.168
Jianwen YAN, Changsheng CAI, Minsi AO, Chunhuaianwen CHEN. A PPP Adaptive Stochastic Model for Low-Cost GNSS Receivers in Complex Environments[J]. Journal of Geodesy and Geodynamics, 2025 , 45 (3) : 297 -302 . DOI: 10.14075/j.jgg.2024.04.168
Funding
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  • Open Fund of State Key Laboratory of Geo-Information Engineering(SKLGIE2021-Z-2-1)
  • National Natural Science Foundation of China(42174040)
  • National Natural Science Foundation of China(42388102)
  • Project of Department of Natural Resources of Hunan Province(HNGTCH-2023-05)
Appendix
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Year 2025 volume 45 Issue 3
23
8
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Article Info
doi: 10.14075/j.jgg.2024.04.168
  • Receive Date：2024-04-12
  • Online Date：2026-10-30
  • Published：2025-03-15
Article Data
Affiliations
History
  • Received：2024-04-12
Funding
Open Fund of State Key Laboratory of Geo-Information Engineering(SKLGIE2021-Z-2-1)
National Natural Science Foundation of China(42174040)
National Natural Science Foundation of China(42388102)
Project of Department of Natural Resources of Hunan Province(HNGTCH-2023-05)
Affiliations
    1 School of Geosciences and Info-Physics, Central South University, 932 South-Lushan Road, Changsha 410083, China
    2 State Key Laboratory of Geo-Information Engineering, 1 Mid-Yanta Road, Xi' an 710054, China
    3 Hunan Institute of Surveying and Mapping Technology, 693 Mid-Shaoshan Road, Changsha 410007, China
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https://castjournals.cast.org.cn/joweb/ddcl/EN/10.14075/j.jgg.2024.04.168
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