Contact

• E-mail: xycao@njnu.edu.cn
• Office Address: 403, School of Geographic Sciences, Nanjing Normal University, Nanjing, China
• Correspondence Address: No.1 Wenyuan Road, Qixia District, Nanjing, Jiangsu, China

Educational Background

• 2015/06 M.S. graduated from China University of Mining and Technology - College of Environment and Surveying and Mapping, Geodesy and Surveying Engineering (Supervisor: Prof. Jian Wang)
• 2018/12 PhD graduated from Wuhan University - School of Surveying and Mapping, Geodesy and Survey Engineering (Supervisor: Prof. Jiancheng Li)

Research experience

• 2023/09-2024/09, ETH Zurich, Institute of Geodesy and Photogrammetry, Visiting Scholar
• 2019/02-present, Nanjing Normal University, School of Geographical Sciences

Primary research interests

• Major Research Directions BeiDou/GNSS high-precision space-time position services (positioning, navigation, timing)
• Near-Earth Space Environment Sensing and Intelligent Processing (troposphere, ionosphere, soil moisture)
• Multi-source Spatial Positioning Resource Development and Utilization (multi-sensor, multi-source information fusion, machine learning)

Part-time work in society

• Member of Location Service Working Committee of China Society of Surveying and Mapping
• Secretary of Academic Working Committee of Jiangsu Society of Surveying, Mapping and Geoinformation
• Administrative Secretary of Key Laboratory of Jiangsu Universities (National Key Laboratory Cultivation and Construction Site)
• Distinguished Professor of Guizhou Scientific and Technological Innovation Leading Talent Workstation
• Member of the Youth Working Committee of Jiangsu Society of Surveying, Mapping and Geoinformation (2019-2023)
• Youth Editorial Board Member of the Science and Technology Herald, a journal of the China Association for Science and Technology (CAST) Long-term reviewer for several TOP journals, such as IEEE Transactions and GPS Solutions.

Honors and awards

• Young Talent Support Project of China Association for Science and Technology (CSST-funded quota)
• Lecture Competition for Young Teachers of Surveying and Mapping Specialties in Higher Educational Institutions - Principles of GNSS - Grand Prize (2022, Steering Committee for Teaching of Surveying and Mapping Specialties in Higher Educational Institutions of the Ministry of Education)
• Remote Sensing and Geographic Information Science and Technology Award for Young People of Jiangsu Province (2022, Jiangsu Society of Remote Sensing and GIS)
• High-level Innovative and Entrepreneurial Talents of Jiangsu Province - Dr. Double Creation (2020) Dr. Shuangchuang (2020, Organization Department of Jiangsu Provincial Committee of the Communist Party of China)
• Outstanding Author of the Year and Outstanding Paper of the Year, Journal of Wuhan University-Information Science Edition (2023/2024)
• Nanjing Normal University “Young and Middle-aged Leading Talents” Cultivation Program - Young Top-notch (2023-2027)
• Annual Outstanding Undergraduate Teaching Award, Nanjing Normal University (2020/2021) Undergraduate Teaching Award, 2020/2021/2022
• National Undergraduate Students' Innovation and Entrepreneurship Competition in Surveying and Mapping Disciplines Awarded-Instructor, 2021/2022
• Outstanding Dissertation for Master's Degree in Surveying and Mapping Geoinformation in Colleges and Universities of Jiangsu Province- Instructor, 2022/2023
• Outstanding Dissertation for Undergraduate Students' Degree in Surveying and Mapping Geoinformation in Colleges and Universities of Jiangsu Province- Instructor, 2022 Competition Award - Instructor, 2019/2020/2022/2024
• Nanjing Normal University Outstanding Graduate Student Dissertation - Instructor, 2024

Recently Published Papers (*Corresponding Author)

We have published more than 40 academic papers, of which 20 are first/corresponding authors (included SCI are JCR Q1/Q2), and the first/corresponding author papers in the last 3 years are as follows:

2024

• Young Talent Support Project of China Association for Science and Technology (CSST-funded quota)
• Lecture Competition for Young Teachers of Surveying and Mapping Specialties in Higher Educational Institutions - Principles of GNSS - Grand Prize (2022, Steering Committee for Teaching of Surveying and Mapping Specialties in Higher Educational Institutions of the Ministry of Education)
• Remote Sensing and Geographic Information Science and Technology Award for Young People of Jiangsu Province (2022, Jiangsu Society of Remote Sensing and GIS)
• High-level Innovative and Entrepreneurial Talents of Jiangsu Province - Dr. Double Creation (2020) Dr. Shuangchuang (2020, Organization Department of Jiangsu Provincial Committee of the Communist Party of China)
• Outstanding Author of the Year and Outstanding Paper of the Year, Journal of Wuhan University-Information Science Edition (2023/2024)
• Nanjing Normal University “Young and Middle-aged Leading Talents” Cultivation Program - Young Top-notch (2023-2027)
• Annual Outstanding Undergraduate Teaching Award, Nanjing Normal University (2020/2021) Undergraduate Teaching Award, 2020/2021/2022
• National Undergraduate Students' Innovation and Entrepreneurship Competition in Surveying and Mapping Disciplines Awarded-Instructor, 2021/2022
• Outstanding Dissertation for Master's Degree in Surveying and Mapping Geoinformation in Colleges and Universities of Jiangsu Province- Instructor, 2022/2023
• Outstanding Dissertation for Undergraduate Students' Degree in Surveying and Mapping Geoinformation in Colleges and Universities of Jiangsu Province- Instructor, 2022 Competition Award - Instructor, 2019/2020/2022/2024
• Nanjing Normal University Outstanding Graduate Student Dissertation - Instructor, 2024

2023

• An investigation of PPP time transfer via BDS-3 PPP-B2b service, GPS Solutions, Corresponding author, Region I TOP (ESI Highly Cited)
• BDS-3/GNSS non-combined precision single-point localization, Journal of Wuhan University - Information Science Edition, first author (Journal 2023 Outstanding Author and Outstanding Paper)
• The benefit of B1C/B2a signals for BDS-3 wide-area decimeter-lever and centimeter-lever point positioning with observable-specific signal bias, Measurement, Corresponding author, Region II TOP

2022

• An efficient method for undifferenced BDS-2/BDS-3 high-rate clock estimation. GPS Solutions, First author, Region I TOP
• BDS-3/GNSS multi-frequency precise point positioning ambiguity resolution using observable-specific signal. Measurement, First author, Region II TOP
• Inter-frequency code bias handling and estimation for multi-frequency BeiDou-3/Galileo uncombined precise point positioning. Measurement Science and Technology, First author

2021

• Time delay bias between the second and third generation of BeiDou Navigation Satellite System and its effect on precise point positioning, Measurement, First author, Region II TOP
• BDS-3/Galileo Time and Frequency Transfer with Quad-Frequency Precise Point Positioning. Remote Sensing, Corresponding author.
• Satellite availability and positioning performance of uncombined precise point positioning using BeiDou-2 and BeiDou-3 multi-frequency signals, Advances in Space Research, First author

Major scientific research projects undertaken (participated)

• National Natural Science Foundation of China (NSFC), Real-time Pseudo-absolute Phase Deviation Unified Estimation for Non-differential Fuzzy Fixation of GNSS Full Frequency Points, 480,000, presided over 
•  China Association for Science and Technology (CAST) Young Talent Support Project, Development and Utilization of Multi-source Spatial Positioning Resources in Different Geographic Scenarios, 300,000, presided over 
•  National Natural Science Foundation of China (NSFC), Study on Fast Centimeter-level Positioning Model of BDS-3/Galileo Quad-frequency Wide-area Single Station, 250,000, presided over Research on centimeter-level positioning model, 250,000, presided over 
•  Youth Fund of Natural Science Foundation of Jiangsu Province, Research on fast estimation model of BDS-3/BDS-2 joint precision satellite clock difference, 200,000, presided over 
•  Introduction Program of High-level Innovative and Entrepreneurial Talents in Jiangsu Province-Doctoral Program for Shuangchuang, 150,000, presided over 
•  Outstanding Sino-foreign Young People's Exchange Program of China Association for Science and Technology, presided over 
•  Key Laboratory of Territorial Satellite Remote Sensing Application of the Ministry of Natural Resources Open Project-Key Project, Research and Demonstration of Key Technology of Precision Agriculture Based on Satellite Remote Sensing and BeiDou Navigation, 200,000, presided 
•  Dynamic Vehicle-mounted High-precision Timing Technology of BeiDou/INS Fusion, presided 
•  Workstation of Scientific and Technological Innovation Leading Talents of Guizhou Province, 3 million, Distinguished Professor 
•  *** Key Technology of Navigation Modeling Algorithm, 2,020,000, Technical Leader 
•  *** Ocean Surveying and Mapping, 10 million, Second Participant Research on key technology of real-time cooperative service of space-time benchmark, 1.16 million, participant 
•  Research on inversion method of surface soil moisture based on satellite reflection signal, 580,000, first participant 
•  Research on key technology of non-differential ambiguity fixing for BDS-3/BDS-2 fusion precision single-point positioning, 100,000, first participant Participant 
•  National Natural Science Foundation of China (NSFC), Research on Kinematic Orbiting Method of Fuzzy Fixation Based on Non-differential and Non-combined Models, 630,000, first participant.