Guangcai Li

Work address     Innovation Academy for Precision Measurement Science and Technology (APM), CAS

 No. 349 Xudong Street, Wuchang District, Wuhan, 430079, China

Email                   guangcai.li@apm.ac.cn; guangcai.li@whu.edu.cn; lgcgnss@gmail.com

ORCID               0000-0002-0892-3390

Summary

Guangcai Li is an associate researcher at APM, CAS. He obtained his Ph.D. in Geodesy and Engineering Surveying from Wuhan University in 2021. His research interests lie in the theory and methods of GNSS high-precision positioning, with a particular focus on mass-market/Android GNSS and its applications. He is dedicated to resolving the issues surrounding mass-market GNSS ambiguity resolution, multipath mitigation and multi-sensor fusion, with the aim of facilitating the democratisation of GNSS high-precision positioning. He has published over 40 papers with over 870 citations on Google Scholar and an h-index of 16. Some of his research achievements have been applied to engineering applications such as smartphone navigation positioning, cadastral surveying, and geoscience research. He is currently leading a National Natural Science Foundation of China (NSFC) Youth Fund project, two sub-projects of the NSFC International Cooperation and Exchange Program, and three provincial-level projects. In 2022, he was selected for the Hubei Provincial Postdoctoral Innovation Research Program. His awards include the ION GNSS+ 2020 Student Paper Award, the 2025 Shaanxi Higher Education Institutions Outstanding Scientific Research Achievement Award (First Prize), and the 2025 Satellite Navigation and Positioning Science and Technology Progress Award (First Prize). He has been appointed as the Chair of the "Mass-market high-precision GNSS and applications" Working Group and a member of the "Smartphone and Low-cost GNSS" Working Group by the International Association of Geodesy (IAG). Additionally, he serves as a young editor for Satellite Navigation and a reviewer for various international journals. 

Professional experiences

        · 2024-Present, Associate Researcher, APM, CAS, P.R. China

Mass-market high-precision GNSS and applications, AI 

· 2023-2024, Associate researcher, Wuhan University, P.R. China

Mass-market high-precision GNSS and applications 

· 2021-2023, Postdoctor of GNSS Research Center, Wuhan University, P.R. China

Supervised by Prof. Jingnan Liu and Jianghui Geng

Developed the external GNSS antenna specifically designed for smartphones, conducted comprehensive evaluations of mass-market GNSS performance, and verified the feasibility of mass-market GNSS centimeter-level positioning with ambiguity resolution.

Education

· 2017-2021, Ph.D. of Geodesy and Engineering Surveying, Wuhan University, China
Thesis title: Theory and Method of GNSS Ambiguity Resolution for Smartphones

· 2014-2017, Master of Geodesy and Engineering Surveying, Information Engineering University, China

Thesis title: Research on the key technology of multi-GNSS integrated navigation and positioning

· 2010-2014, BSc. of Geodesy and Engineering Surveying, Shandong Agricultural University, China

Project and Grants

· 2023-2026, National Natural Science Foundation of China (NSFC) Youth Science Fund Project, Adaptive Error Processing Method for Smartphone BeiDou/GNSS Decimeter-level Positioning (PI)

· 2022-2024, 72nd batch of funding from China Postdoctoral Science Foundation, Robust Positioning Method for Smartphone BeiDou/GNSS Decimeter-level Positioning (PI)

· 2022-2024, Hubei Provincial Postdoctoral Innovative Research Post Funding Project, Optimizing BeiDou/GNSS Data Quality for Monitoring Geological Hazards in Complex Mountainous Regions (PI)

· 2021-2022, Commercialization of scientific and technological achievements, PRIDEANDRTK Satellite Navigation and Positioning Application V1.0 (PI)

· 2024-2027, NSFC-NCN Project (China-Poland), Exploring the potential of mass-market high-precision GNSS for geoscience applications (Participant)

· 2023-2025, NSFC-RS Project (China-UK), Integration of consumer-grade GNSS and accelerometers for structural and seismic motion monitoring (Participant)

· 2022-2025, Special Fund of Hubei Luojia Laboratory, Smartphone BeiDou/multi-source fusion high-precision robust positioning (Participant)

· 2022-2025, National Key R&D Program Project, Key Technologies and Application，Componentized Flexible Integrated Navigation and Control Key Technology and Application Verification (Participant)

· 2021-2024, National Key R&D Program Project, Development of BeiDou Integrated System for Monitoring and Early Warning of Geological Disasters in Complex Mountainous Areas (Participant)

Selected awards & scholarships since 2010

· ION GNSS+ 2020 Student Paper Award (only 4 worldwide), US, 2020

· Postdoctoral Innovative Research Position Grantee, Hubei Province, 2022

· Guanghua Scholarship of Wuhan University, China, 2021

· Excellent Graduate of Wuhan University, China, 2021

· First Prize in the Algorithm Capability Category of the First Beidou Intelligent Creator Competition, China, 2020

· CPGPS Forum "Best Oral Presentation", 2018

· Excellent Dissertation of Information Engineering University, 2018

· Excellent Graduate of Information Engineering University, China, 2017

· Excellent Graduate of Shandong Agricultural University, China, 2014

· Excellent Graduate of Shandong Province, China, 2014

· National Scholarship, China, 2013

· First Prize in the Preliminary Round of the Fifth Chinese Mathematics Competitions, China, 2013

· Outstanding Student Leader of Shandong Province, China, 2013

· Top Ten "100 Excellent Students" of Shandong Agricultural University, China, 2012

· National Encouragement Scholarship, China, 2011

Journal editors & reviews & membership

· 2023-present: International Association of Geodesy (IAG-WG 4.2.3) “Mass-market high-precision GNSS and applications”, Chair

· 2023-present: Satellite Navigation, Young Editor

· 2019-present: International Association of Geodesy (IAG-WG 4.4.3) “Smartphone and low-cost GNSS”, Member

· 2020-present: Satellite Navigation, “BDS/GNSS high-precision products: strategies, services, and applications”, Assisting Editor

· 2020-present, Journal of Geodesy, GPS Solution, Measurement, IEEE Transactions on Instrumentation and Measurement, Advances in Space Research, Journal of Spatial Science, Earth Science Informatics etc., Review

Peer-reviewed journal publications (*Corresponding authors)

1. Li Guangcai, Geng Jianghui* (2019) Characteristics of raw multi-GNSS measurement error from Google Android smart devices. GPS Solutions 23:90-106

2. Geng Jianghui, Li Guangcai (2019) On the feasibility of resolving Android GNSS carrier-phase ambiguities Journal of Geodesy 93:2621-2635 doi:10.1007/s00190-019-01323-0

3. Li Guangcai, Geng Jianghui* (2022) Android multi-GNSS ambiguity resolution in the case of receiver channel-dependent phase biases. Journal of Geodesy 96:72 doi:10.1007/s00190-022-01656-3

4. Li Guangcai, Geng Jianghui*, Chu Bin (2023) High-precision velocity determination using mass-market Android GNSS measurements in the case of anomalous clock variations. GPS Solutions 27:98

5. Li Guangcai*, Wu Jiangfei, Zhao Caixin, Tian Yijun (2017) Double differencing within GNSS constellations Gps Solutions 21:1161-1177 doi:10.1007/s10291-017-0599-4

6. Ren Hanxin, Li Guangcai*, Geng Jianghui, Wang Feng, Li Pengbo. (2023). Multipath hemispherical map model with geographic cut-off elevation constraints for real-time GNSS monitoring in complex environments. GPS Solutions 27, 188

7. Geng Jianghui, Li Pengbo, Li Guangcai*. (2024). Combining the GPS/Galileo/BDS-3 signals on overlap frequencies for interoperable multipath hemispherical maps. Journal of Geodesy, 98(4), 32. doi: 10.1007/s00190-024-01841-6

8. Cheng Sisi, Wang Feng, Li Guangcai*, Geng Jianghui. (2023). Single-Frequency Multi-GNSS PPP-RTK for Smartphone Rapid Centimeter-Level Positioning. IEEE Sensors Journal.

9. Geng, Jianghui, Long Chiyu, Li Guangcai*. (2023). A Robust Android GNSS RTK Positioning Scheme Using Factor Graph Optimization. IEEE Sensors Journal.

10. Li Guangcai*, Long Chiyu, Wang Feng. (2020). Synchronizing and Integrating Android Multi-GNSS/accelerometer Sensors to Capture Broadband Vibrations at Sub-centimeter Resolution. Paper presented at the Proceedings of the 33rd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2020). doi: 10.33012/2020.17677 (ION GNSS+ Student Paper Award)

Academic presentations

• 2025 IAG, High-Precision Wide-Bandwidth Deformation Monitoring Using Mass-Market GNSS/Accelerometers, 2025.9

• 2024 CNC-IAG, Mass-market GNSS/accelerometer high-precision broadband deformation monitoring, 2024.5

• 2020 ION GNSS+, Synchronizing and Integrating Android Multi-GNSS/accelerometer Sensors to Capture Broadband Vibrations at Sub-centimeter Resolution, 2020.9

• 2018 CPGPS Forum, Multi-GNSS carrier-phase double-difference positioning using smart devices, 2018.7

• 2016 CSNC Forum, A New Approach of Satellite Selection for Multi-constellation Integrated Navigation System, 2016.5

Patents and softwritings

• An intelligent autonomous networked earthquake early warning equipment and method. Patent No. ZL202010453626.3

• Seismic Rotation Measurement System and Method with GNSS Dual Antenna Assisted Gyroscope. Patent No. ZL202111392765.0

• A building height measurement method based on crowdsourced GNSS data . Patent No. ZL202411145793.6

• PRIDEANDRTK Satellite Navigation and Positioning Application V1.0. Software copyright No. 2022SR0637118 

• Smartphone Beidou + 5G Precise Epidemic Flow Investigation APP. Software copyright No. 2024SR0735064

• Shared Beidou Module Collaborative Smartphone Positioning Application Software. Software copyright No. 2025SR2139823