Prof. Wu Chen

Prof. Wu Chen joined the Hong Kong Polytechnic University in 2000 and currently is a professor at Department of Land Surveying and Geoinformatics, Hong Kong Polytechnic University. He has been actively working on GNSS related research for over 30 years and has been working on a large number of research projects funded by universities, governments, and industries. His main research interests are Geodesy and Geodynamics, Seamless positioning technologies, indoor positioning, navigation and integrity, GNSS positioning and applications, system integration, GNSS performance evaluation, regional GPS network, wireless sensor network positioning, and Airborne Lidar applications. He has published over 300 technical papers in different journals and international conferences, submitted over 30 technical reports to various organizations, granted or filed more than 10 patents. 

Recent Research Projects

Recent Journal Publications

1. Lu M., W. Chen, X. Shen, H.C. Lam, J. Liu (2007), Positioning and Tracking Construction Vehicles in Highly Dense Urban Areas and Building Construction Sites, Automation in Construction, 16(5): 647-656
2. Zhang L., F. Li, W. Chen (2007), Influence of Gravity Disturbance Resolution on GPS/Gravity Boundary Value Problem, Geomatics and Information Science of Wuhan University, 32(6): 523-526
3. Lu M., F. Dai, W. Chen, (2007) Real-time decision support for planning concrete plant operations enabled by integrating vehicle-tracking technology, simulation and optimization algorithms, Canadian Journal of Civil Engineering, 34(8): 912-922
4. Ji S., W. Chen, C. Zhao, X.L. Ding, Y.Q. Chen (2007) Single epoch ambiguity resolution for Galileo with the CAR and LAMBDA methods, GPS Solution, 11 (4): 259-268
5. Chen W., S. Gao, C. Hu, Y.Q. Chen, X.L. Ding (2008) Effects of ionospheric disturbances on GPS observation in low latitude area, GPS Solution, 12 (1): 33-41
6. Zhong P, X.L. Ding, D.W. Zheng, W. Chen, D. Huang (2008) Adaptive wavelet transform based on cross-validation method and its application to GPS multipath mitigation, GPS solution, 12(2): 109-117 
7. Shen X., W. Chen and M. Lu (2008) Wireless Sensor Networks for Resources Tracking at Building Construction Sites, Tsinghua Science & Technology, 13(S1): 78-83
8. Chen W., Z. Li, M. Yu, and Y.Q. Chen, (2008) An Integrated Map Match Algorithm with Position Feedback and Shape-based Mismatch Detection and Correction, Journal of Intelligent Transportation Systems, 12(4): 168 - 175
9. Zhang L., F. Li, W. Chen, C. Zhang, (2009) Height datum unification between Shenzhen and Hong Kong using the solution of the linearized fix-gravimetric boundary value problem, J. of Geodesy, 83(5): 411-417
10. Lu M., X. Shen; and W. Chen (2009) Automated Collection of Mixer Truck Operations Data in Highly Dense Urban Areas, ASCE Journal of Construction Engineering and Management, 135(1): 17-23 
11. Chen W., C. Hu, S. Gao, Y.Q. Chen, and X.L. Ding (2009) Error Correction Models and Their Effects on GPS Precise Point Positioning, Survey Review, 41:238-252
12. Yan H., W. Chen, Y. Zhu, W. Zhang, and M. Zhong (2009) Contributions of thermal expansion of monuments and nearby bedrock to observed GPS height changes, Geophysics Research Letters, 36: L13301
13. Yuan L. G., X. L. Ding, P. Zhong, W. Chen, D. F. Huang (2009) Estimates of ocean tide loading displacements and its impact on position time series in Hong Kong using a dense continuous GPS network. Journal of Geodesy, 83(11):999-1015
14. Yuan L.G., X.L. Ding, H.P. Sun, P. Zhong and W. Chen (2010) Determination of ocean tide loading displacements in Hong Kong using GPS technique, SCIENCE CHINA Earth Sciences, 53(7): 993-1007
15. Shen X., M. Lu, and W. Chen (2010) Computing Three-Axis Orientations of a Tunnel Boring Machine through Surveying Observation Points, Journal of Computing in Civil Engineering 1:54
16. Shen X., M. Lu, and W. Chen (2010) Tunnel Boring Machine Positioning during Microtunneling Operations through Integrating Automated Data Collection with Real Time Computing, Journal of Construction Engineering and Management 1:168
17. Ji S., W Chen, X.L. Ding, Y.Q. Chen, C. Zhao and C. Hu (2010) Potential Benefits of GPS/GLONASS/GALILEO Integration in an Urban Canyon-Hong Kong, Journal of Navigation, 63: 681-69
18. Ji S., W. Chen, X.L. Ding, Y.Q. Chen; C. Zhao, C. Hu, (2010) Ambiguity validation with combined ratio test and ellipsoidal integer aperture estimator, Journal of Geodesy, 84(10):597-604
19. Yan H., W. Chen, Y. Zhu, W. Zhang, M. Zhong, G. Liu, (2010) Thermal effects on vertical displacement of GPS stations in China, Chinese Journal of Geophysics, 53(2): 252_260
20. Ji, S., W. Chen, X. Ding, and C. Zhao (2011), Equatorial ionospheric zonal drift by monitoring local GPS reference networks, J. Geophys. Res., 116: A08310
21. Ding Q., W. Chen, B. King, Y.Q. Chen, Y. Liu, H. Zhang, (2011) Coastal Wetland Investigations by Airborne LiDAR: A Case Study in the Yellow River Delta, China, Marine Technology Society Journal, 45(5): 59-70
22. Xu, G., T. Xu, T.K. Yeh, W. Chen (2011) Analytical solution of a satellite orbit disturbed by lunar and solar gravitation, Monthly Notices of the Royal Astronomical Society, 410(1): 645-653
23. Xu, G., T. Xu, W. Chen, T.K. Yeh (2011) Analytical solution of a satellite orbit disturbed by atmospheric drag, Monthly Notices of the Royal Astronomical Society
    410(1): 654-662
24. Chong Y., W. Chen, Z. Li, W.H.K. Lam (2011) Method for Preceding Vehicle Type Classification based on Sparse Representation". TRANSPORTATION RESEARCH RECORD: JOURNAL OF TRANSPORTATION RESEARCH BOARD, 2243: 74-80
25. Iz B., Y. Q. Chen, C. K. Shum, X. L. Ding, B. A. King, W. Chen and M. Berber (2012) Assessing consistency of Chang’E-1 and SELENE reference frames using nearly-colocated laser altimetry footprint positions, Journal of Geodesy, 86(2): 109-117
26. Chong Y., W. Chen, Z. Li, W. H. K. Lam, C. Zheng and Q. Li (2012) Integrated Real-Time Vision-Based Preceding Vehicle Detection in Urban Roads, Advanced Intelligent Computing, Lecture Notes in Computer Science, Volume 6838/2012: 270-275
27. Prasanna I., W. Chen, (2012) Geoid modeling using a high resolution geopotential model and terrain data: A case study in Canadian Rockies, J. of Applied Geodesy, 6(2): 89-01
28. Ji S., W. Chen, X. L. Ding, Y. Q. Chen, C. M. Zhao and C. W. Hu (2013) An improved cascading ambiguity resolution (car) method with Galileo multiple frequencies, survey review, 45(328): 51-58
29. Kao S., Y. Tu, W. Chen, D. Weng, S. Ji (2013) Factors affecting the estimation of GPS receiver instrumental biases, Survey Review 45(328):59-67
30. Kao S., Y. Tu, S. Ji, W. Chen, Z. Wang, D. Weng , X.L. Dingc T. Hu (2013) A 2-d ionospheric model for low latitude area – Hong Kong, Advances in Space Research 51(9): 1701-1708
31. Ding Q., W. Chen, B. King, Y. Liu, G. Liu (2013) Combination of overlap-driven adjustment and Phong model for LiDAR intensity correction, ISPRS Journal of Photogrammetry and Remote Sensing 75:40-47
32. Ji S., W. Chen, D. Weng, Z. Wang, X.L. Ding (2013) A study on cycle slip detection and correction in case of ionospheric scintillation, Advances in Space Research, 51(5): 742-753
33. Liu Z., S. Ji; W. Chen; and X.L. Ding, (2013) New Fast Precise Kinematic Surveying Method Using a Single Dual-Frequency GPS Receiver, J. of Surveying Engineering (ASCE), 139(1): 19-33
34. Prasanna I., W Chen, HB Iz, (2013) High resolution local Moho determination using gravity inversion: a case study in Sri Lanka, Journal of Asian Earth Sciences, 74(25):62-70
35. Prasanna I. W Chen, D Gomez-Ortiz, (2014) Geophysical Investigation of Lithosphere Structure Beneath Sri Lanka Using Surface and Internal Load Variations. Pure and Applied Geophysics, 171(8): 1951-1962
36. Ji S., Y. Xu, W. Chen, Z. Wang, D. Weng, B. Huang, S. Fan and G. Sun (2014) Comparison of standalone performance between COMPASS and GPS, Journal of Navigation, 67(1):37-48
37. Weng D., S. Ji, W. Chen and Z. Liu (2014) Assessment and Mitigation of Ionospheric Disturbance Effects on GPS Accuracy and Integrity, Journal of Navigation, 67(3): 371-384
38. Xue S., Y.X. Yang, Y. Dang, W. Chen (2014) Dynamic positioning configuration and its first-order optimization, J. of Geodesy, 88:127-143
39. Chen Q., Y. Shen, X. Zhang, H. Hsu, and W. Chen (2014) Global Earth’s gravity field solution with GRACE orbit and range measurements using modified short arc approach, Acta Geodaetica et Geophysica 50(2): 173-185
40. Ji, SY  ; X. Wang ; Y. Xu, Y  ; Z. Wang, W. Chen, H. Liu, (2014) First Preliminary Fast Static Ambiguity Resolution Results of Medium-Baseline with Triple-Frequency Beidou Wavebands, J. of Navigation, 67(6): 1109-1119
41. Ji, S., D. Weng, Z. Wang, W. Chen, W. Chan (2014) Second-order ionospheric effect on PPP over Hong Kong, J. of Atm. and Solar-Terrestrial Physics, 119: 184-192
42. Chen, Q., Y. Shen, X. Zhang, H. Hsu, W. Chen, X. Ju, and L. Lou (2015), Monthly gravity field models derived from GRACE Level 1B data using a modified short-arc approach, J. Geophys. Res. Solid Earth, 120(3):1804–1819
43. Xu R., Z. Liu, W. Chen (2015) Improved FLL-assisted PLL with in-phase pre-filtering to mitigate amplitude scintillation effects, GPS Solution, 19(2): 263–276
44. Weng D., S. Ji, W. Chen, Z. Li, Y. Xu, L. Ye (2015) Assessing and Mitigating the effects of the ionospheric variability on DGPS, GPS Solution, 19(1): 107–116
45. Hung R., B. King and W. Chen (2015) Conceptual Issues Regarding the Development of Underground Railway Laser Scanning Systems, ISPRS Int. J. Geo-Inf., 4(1): 185-198
46. Weng D., S. Ji, W. Chen, Z. Li, Y. Xu, L. Ye (2015) Assessing and mitigating the effects of the ionospheric variability on DGPS, GPS Solutions, 19(1): 107-116
47. Xu R., W. Chen, Y. Xu and S. Ji (2015) A New Indoor Positioning System Architecture Using GPS Signals, Sensors 2015, 15, 10074-10087
48. Chen Q., Y. Shen, W. Chen, X. Zhang, H. Hsu and X. Ju (2015) A modified acceleration-based monthly gravity field solution from GRACE data, Geophys. J. Int., 202: 1190–1206
49. Ji S., W. Chen, D. Weng, Z. Wang (2015) Characteristics of equatorial plasma bubble zonal drift velocity and tilt based on Hong Kong GPS CORS network: From 2001 to 2012, J. Geophys. Res. Space Physics, 120: 7021–7029
50. Xu R., Z. Liu and W. Chen (2015) Multi-PLL with two-stage fusion to mitigate ionospheric scintillation effects on GPS receivers, Radio Science, 50(7): 630–641
51. Chen Q. Y. Shen, X. Zhang, W. Chen, H. Hsu (2015) Tongji-GRACE01: A GRACE-only static gravity field model recovered from GRACE Level-1B data using modified short arc approach, Advances in Space Research, 56(5): 941–951,
52. Xu Y., S. Ji, W. Chen, D. Weng (2015) A new ionosphere-free ambiguity resolution method for long-range baseline with GNSS triple-frequency signals, Advances in Space Research, 56(8): 1600–1612
53. Yan H., W. Chen, L.G. Yuan (2016) Crustal vertical deformation response to different spatial scale GRACE and GCMs surface loading, Geophys. J. Int., 204 (1): 505-516
54. Wang Z., X. Wang, S. Ji and W. Chen (2016) Optimal cycle slip detection and correction with reliability, Survey Review, 48(349): 233-239
55. Chen Q. Y. Shen, W. Chen, X. Zhang, H. Hsu (2016) An improved GRACE monthly gravity field solution by modelling the non-conservative acceleration and attitude observation errors, J. of Geodesy, 90(6): 503-523
56. Chen Q. Y. Shen, X. Zhang, W. Chen, H. Xu (2016) GRACE, Data-based High Accuracy Global Static Earth’s Gravity Field Model, Acta Geodaetica et Cartographica Sinica, 45(4):396-403
57. Kumar S., W. Chen, Z. Liu, S. Ji (2016) Effects of solar and geomagnetic activity on the occurrence of equatorial plasma bubbles over Hong Kong, JGR Space Physics, 121(9): 9164–9178
58. Tang S., Q. Zhu, W. Chen, M. Chen (2016) Enhanced RGB-D Mapping Method for Detailed 3D Indoor and Outdoor Modeling, Sensors 16(10):1589 
59. Wang Z., X. Wang, S. Ji & W. Chen (2016) Optimal cycle slip detection and correction with reliability, Survey Review, 48:349: 233-239
60. Qiao J., and W. Chen (2016) Improving BDS autonomous orbit determination performance using onboard accelerometers, Acta Geodaetica et Cartographica Sinica, 45(S2): 116-131
61. Darwish W., S. Tang, W. Li, and W. Chen (2017) A New Calibration Method for Commercial RGB-D Sensors, Sensors 17(6): 1204
62. Yang C., W. Shi, W. Chen (2017) Comparison of Unscented and Extended Kalman Filters with Application in Vehicle Navigation, Journal of Navigation, 70(2): 411-431
63. Wu Y., Z. Luo, W. Chen and Y.Q. Chen (2017) High-resolution regional gravity field recovery from Poisson wavelets using heterogeneous observational techniques, Earth, Planets and Space, 69:34,
64. Zheng Y., Y. Yang, and W. Chen (2017) A Novel Range Compression Algorithm for Resolution Enhancement in GNSS-SARs, Sensors 2017, 17(7), 1496
65. Yu W., X.L. Ding, W. Dai, W. Chen (2017) Systematic error mitigation in multi-GNSS positioning based on semiparametric estimation, J Geod (2017). doi:10.1007/s00190-017-1038-6
66. Xu R., W. Chen, Y. Xu, S. Ji, J. Liu (2017) Improved GNSS-based indoor positioning algorithm for mobile devices, GPS solution, 2017, DOI 10.1007/s10291-017-0647-0
67. Kumar S., W. Chen, M. Chen, Z. Liu, R. P. Singh (2017), Thunderstorm/Lightning induced ionospheric perturbation: An observation from equatorial and low latitude stations around Hong Kong" Journal of Geophysical Research - Space Physics, DOI: 10.1002/2017JA023914