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Dr Yong Chien Zheng

Yong Chien Zheng 2022 image

PhD (Otago) MSc (UTM) BSc (UTM)

Email yong.chienzheng@otago.ac.nz
Tel +64 3 479 7584
Office: Surveying building, first floor, Room 126

Profile

Lecturer

Yong is a geodesist who studies how the Earth's plate tectonic motions change over space and time. He is also interested to learn about the Earth's deformation (vertical land motion, landslides, etc.) with the Global Positioning System (GPS) measurements. With the emerging Global Navigation Satellite System (GNSS), his current research focuses on utilising the GPS/GNSS measurements with low-cost instruments to achieve high-precision positioning in geodynamics and deformation studies.

In 2012, he completed an MSc (Satellite Surveying) degree at Universiti Teknologi Malaysia (UTM). He then worked as a field surveyor in Singapore, carrying out a variety of cadastral, geodetic and engineering survey projects. A year later, in 2014, he undertook a PhD study at the School of Surveying, the University of Otago, in tectonic geodesy using nearly two decades of GPS data to investigate the impact of the great earthquakes (Magnitude 8 and above) in the western margin of Sundaland plate (Southeast Asia). After completing his PhD in 2019, he worked as a Postdoctoral Research Fellow in the same school with the project title: “Precise GNSS Positioning with Smartphones”, funded by Geoscience Australia (FrontierSI) in collaboration with RMIT University and the Australian National University. Yong was appointed as a Senior Lecturer at the UTM a year later in 2020, where he was teaching in surveying fundamentals (Year 1 Surveying and Computation), geometrical geodesy (Year 3 Map Projection), industrial surveying (Year 4) and a few other general papers (Year 3 Technical Writing and Year 4 Dissertation).

He returned to the University of Otago in October 2022 as a lecturer in the School of Surveying. His roles in the School are delivering the surveying fundamentals in Surveying and Spatial Science, introductory field courses and other papers. He is passionate about research by involving himself in plate tectonic, Earth deformation, and vertical land motion projects. His research currently focuses on studying an alternative positioning approach using smartphones and low-cost receivers capable of providing high-positioning performance for tectonic geodesy studies.

Teaching

  • SURV120 Surveying and Spatial Science (co-ordinator)
  • SURV298 Introductory Field Course (co-ordinator)

Research

Research Interests

  • Precise GPS/GNSS positioning
  • Low-cost and smartphone receivers
  • Tectonic geodesy
  • Earth Deformation
  • Vertical Land Motion

Projects

Current projects

  • Geoid Modelling. Project participant in “Optimum Approach of Downward Continuation and Geoid Computation to Produce Precise Hybrid Geoid Model Over Sarawak” (2022–ongoing)
  • Earth Deformation. Project participant in “An Integration of the Atmospheric Correction Derived from GPS and Microwave Radiometer Data for Improving Persistent Scatterer InSAR Processing in Dam Surface Deformation Modelling.” (2021–ongoing)
  • Land subsidence. Monitoring the vertical land movement in Kelantan, Malaysia with long record GPS CORSs measurements
  • Tectonic geodesy. Crustal deformation analysis in the Western Sundaland Plate (Indonesia, Malaysia, Singapore, Thailand, Borneo) from long record GPS CORSs measurements

Completed projects

  • Smartphone Positioning. Postdoctoral Research Fellow of “Precise GNSS positioning with smartphones”, funded by Geoscience Australia. (2020–2021)
  • PhD. Tectonic Geodesy: An Analysis of the Crustal Deformation of the Western Sundaland Plate from Nearly Two Decades of continuous GPS Measurements. (Supervisors: Paul Denys, Christopher Pearson)
  • MSc. Developing Continuous Displacement Detection System for Geohazards Monitoring. (Supervisors: Tajul Ariffin Musa, Rusli Othman)
  • BEng. Deformation Monitoring System in Web-based Visualisation. (Supervisor: Halim Setan)

Supervision

Previous Research Students

  • Mohd Syazwan Affif Sulaiman (2021), BEng(Hons, UTM), Global Navigation Satellite System Positioning Accuracy Performance Assessment with Precise Point Positioning and Relative Positioning. Achievement: Best Research Award, Undergraduate Research Conference 2021
  • Ahmad Danial Yusuf (2021), BEng(Hons, UTM), Determination of Land Volume and Its Accuracy Between GPS and Aerial Photo
  • Chang Yong Sheng (2021), BEng(Hons, UTM), Development of the fault database of Malaysia
  • Chia Yueh En (2021), BEng(Hons, UTM), Quality Assessment for High Precision GNSS Positioning with Android-Based Smartphone
  • Teo Chuan Yi (2021), BEng(Hons, UTM), Satellite geometry analysis and GNSS performance evaluation in the urban environment
  • Khairul Nizam Mohamad Kamal (2021), BEng(Hons, UTM), Determination of Co-seismic Deformation in Peninsular Malaysia During The 2012 Wharton Basin Earthquakes. Co-supervision with Dr Khairulnizam M. Idris

PhD opportunities

There are a number of potential projects in the area of tectonic geodesy for PhD research. Students who are interested must have a University of Otago equivalent grade point average (GPA) of at least 8.0 to be eligible for a competitive scholarship (open to domestic and international students). This scholarship covers a NZ$28,600 stipend per annum plus a domestic tuition fees waiver for 36 months. Further information can be obtained from the Graduate Research School website.

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Publications

Yong, C. Z., Harima, K., Rubinov, E., McClusky, S., & Odolinski, R. (2022). Instantaneous best integer equivariant position estimation using Google Pixel 4 smartphones for single- and dual-frequency, multi-GNSS short-baseline RTK. Sensors, 22, 3772. doi: 10.3390/s22103772

Yong, C. Z., Odolinski, R., Zaminpardaz, S., Moore, M., Rubinov, E., Er, J., & Denham, M. (2021). Instantaneous, dual-frequency, multi-GNSS precise RTK positioning using Google Pixel 4 and Samsung Galaxy S20 smartphones for zero and short baselines. Sensors, 21(24), 8318. doi: 10.3390/s21248318

Yong, C. Z., Denys, P. H., & Pearson, C. F. (2019). Groundwater extraction-induced land subsidence: A geodetic strain rate study in Kelantan, Malaysia. Journal of Spatial Science, 64(2), 275-286. doi: 10.1080/14498596.2018.1429329

Yong, C. Z., Denys, P. H., & Pearson, C. F. (2017). Present-day kinematics of the Sundaland plate. Journal of Applied Geodesy, 11(3), 169-177. doi: 10.1515/jag-2016-0024

Yong, C. Z. (2019). Techtonic geodesy: An analysis of the crustal deformation of the western Sundaland Plate from nearly two decades of continuous GPS measurements (PhD). University of Otago, Dunedin, New Zealand. Retrieved from http://hdl.handle.net/10523/9484

Yong, C. Z., Harima, K., Rubinov, E., McClusky, S., & Odolinski, R. (2022). Instantaneous best integer equivariant position estimation using Google Pixel 4 smartphones for single- and dual-frequency, multi-GNSS short-baseline RTK. Sensors, 22, 3772. doi: 10.3390/s22103772

Journal - Research Article

Yong, C. Z., Odolinski, R., Zaminpardaz, S., Moore, M., Rubinov, E., Er, J., & Denham, M. (2021). Instantaneous, dual-frequency, multi-GNSS precise RTK positioning using Google Pixel 4 and Samsung Galaxy S20 smartphones for zero and short baselines. Sensors, 21(24), 8318. doi: 10.3390/s21248318

Journal - Research Article

Yong, C. Z., Denys, P. H., & Pearson, C. F. (2019). Groundwater extraction-induced land subsidence: A geodetic strain rate study in Kelantan, Malaysia. Journal of Spatial Science, 64(2), 275-286. doi: 10.1080/14498596.2018.1429329

Journal - Research Article

Yong, C. Z., Denys, P. H., & Pearson, C. F. (2017). Present-day kinematics of the Sundaland plate. Journal of Applied Geodesy, 11(3), 169-177. doi: 10.1515/jag-2016-0024

Journal - Research Article

Yong, C. Z. (2019). Techtonic geodesy: An analysis of the crustal deformation of the western Sundaland Plate from nearly two decades of continuous GPS measurements (PhD). University of Otago, Dunedin, New Zealand. Retrieved from http://hdl.handle.net/10523/9484

Awarded Doctoral Degree

Zulkifli, N. A., Din, A. H. M., Aris, W. A. W., & Yong, C. Z. (2021). Differences between 2009 and 2016 revisions based on coordinates in GDM2000. Journal of Information System & Technology Management, 6(24), 161-173. doi: 10.35631/JISTM.624017

Journal - Research Article

Yong, C. Z., Denys, P. H., & Pearson, C. F. (2020). An estimate of the coupling of the Sunda subduction zone from campaign and continuous GPS data (1991-2016). ESSOAr. doi: 10.1002/essoar.10503408.1

Working Paper; Discussion Paper; Technical Report

Yong, C. Z., Denys, P. H., & Pearson, C. F. (2017). The strain segmentation at the Sumatra Subduction Zone based on GPS-derived interseismic coupling. In J. Baker & M. Rowe (Eds.), Geoscience Society of New Zealand Miscellaneous Publication. 134A, (pp. 132). Takaka, New Zealand: GSNZ. [Abstract]

Conference Contribution - Published proceedings: Abstract

More publications...