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Dr. Chris Pearson

Dr Chris PearsonBSc (Union College) MSc (University of Alaska) PhD (Otago)

Email: chris.pearson@otago.ac.nz
Phone: +64 (0)3 479 5095
Room: Surveying building, 1st floor, Room 124

Profile

I teach and conduct research in areas of Geodesy, Crustal deformation, GPS and least square adjustments. I completed my PhD from the University of Otago, New Zealand in the area of earth deformation measurements in 1991 and then spent a year working on a post-doc at Columbia University in the area of GPS processing (Bernese) working on the first major earth deformation campaign in the South Island. In 1994 Between 1994 and 2001 I worked at the University of Otago as a research fellow measuring active deformation of the Southern Alps. During this time I played a key role in the establishment and the New Zealand Tide Gages and the Southern Alps Vertical CGPS networks and nearly all of the campaign style geodetic projects in the South Island undertaken between 1993 and 2001. I was also instrumental in making the first INSAR study of a New Zealand Earthquake. Between 2001 and 2011 I worked at the National Geodetic Survey of the US where I was responsible for development of the HTDP software. Suring that time I played a key role in developing a comprehensive block model of deformation in the western US a new and much improved velocity for Alaska. In 2011 I returned to the School of Surveying where I currently lecture in Surv 302, Surv 451 and Surv 399.

Teaching

Research

Research Interests

  • Geodetic reference systems

  • Dynamic datums
  • Earth Deformation

Current Projects

  • Southern Alps Geodetic Experiment (SAGENZ). Using CGPS to measure the rate and distribution of uplift of the Southern Alps.
  • Fiordland – Co-seismic and Post-seismic deformation. In August 2003, a Mw 7.2 earthquake caused horizontal displacements of up to 18cm in Fiordland, New Zealand.
  • Strain and Velocity Fields. Using GPS to measure the velocity field throughout the South Island (New Zealand). Hence determine the strain variability particularly in the Southern Alps and Central Otago.
  • HTDP Using block modelling of deformation in the western US to develop a velocity field. This is then used to correct positions and survey measurements for crustal deformation.

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Publications

Snay, R. A., Freymueller, J. T., & Pearson, C. (2013). Crustal motion models developed for version 3.2 of the Horizontal Time-Dependent Positioning utility. Journal of Applied Geodesy, 7(3), 173-190. doi: 10.1515/jag-2013-0005

Pearson, C. F., & Snay, R. A. (2014). Strain partitioning along the western margin of North America. Journal of Structural Geology, 64, 67-78. doi: 10.1016/j.jsg.2014.02.012

Denys, P., Norris, R., Pearson, C., & Denham, M. (2014). A geodetic study of the Otago Fault System of the South Island of New Zealand. In C. Rizos & P. Willis (Eds.), Earth on the edge: Science for a sustainable planet. 139, (pp. 151-158). Berlin: Springer. doi: 10.1007/978-3-642-37222-3_19

Pearson, C. F., Snay, R. S., & McCaffrey, R. (2014). Towards an integrated model of the interseismic velocity field along the western margin of North America. In C. Rizos & P. Willis (Eds.), Earth on the edge: Science for a sustainable planet. (pp. 159-165). Berlin, Germany: Springer. doi: 10.1007/978-3-642-37222-3_20

Pearson, C., Freymueller, J., & Snay, R. (2013). Software to help surveying engineers deal with the coordinate changes due to crustal motion in Alaska. In J. E. Zufelt (Ed.), Proceedings of the 10th International Symposium on Cold Regions Development (ISCORD): Planning for Sustainable Cold Regions. [CD-ROM & Book], (pp. 297-307). Reston, VA: American Society of Civil Engineers. doi: 10.1061/9780784412978.031

Snay, R. A., Freymueller, J. T., & Pearson, C. (2013). Crustal motion models developed for version 3.2 of the Horizontal Time-Dependent Positioning utility. Journal of Applied Geodesy, 7(3), 173-190. doi: 10.1515/jag-2013-0005

Journal - Research Article

Pearson, C. F., & Snay, R. A. (2014). Strain partitioning along the western margin of North America. Journal of Structural Geology, 64, 67-78. doi: 10.1016/j.jsg.2014.02.012

Journal - Research Article

Denys, P., Norris, R., Pearson, C., & Denham, M. (2014). A geodetic study of the Otago Fault System of the South Island of New Zealand. In C. Rizos & P. Willis (Eds.), Earth on the edge: Science for a sustainable planet. 139, (pp. 151-158). Berlin: Springer. doi: 10.1007/978-3-642-37222-3_19

Conference Contribution - Published proceedings: Full paper

Pearson, C. F., Snay, R. S., & McCaffrey, R. (2014). Towards an integrated model of the interseismic velocity field along the western margin of North America. In C. Rizos & P. Willis (Eds.), Earth on the edge: Science for a sustainable planet. (pp. 159-165). Berlin, Germany: Springer. doi: 10.1007/978-3-642-37222-3_20

Conference Contribution - Published proceedings: Full paper

Pearson, C., Freymueller, J., & Snay, R. (2013). Software to help surveying engineers deal with the coordinate changes due to crustal motion in Alaska. In J. E. Zufelt (Ed.), Proceedings of the 10th International Symposium on Cold Regions Development (ISCORD): Planning for Sustainable Cold Regions. [CD-ROM & Book], (pp. 297-307). Reston, VA: American Society of Civil Engineers. doi: 10.1061/9780784412978.031

Conference Contribution - Published proceedings: Full paper

Pearson, C., & Snay, R. (2013). Introducing HTDP 3.1 to transform coordinates across time and spatial reference frames. GPS Solutions, 17(1), 1-15. doi: 10.1007/s10291-012-0255-y

Journal - Research Article

Pearson, C., McCaffrey, R., Elliott, J. L., & Snay, R. (2010). HTDP 3.0: Software for coping with the coordinate changes associated with crustal motion. Journal of Surveying Engineering, 136(2), 80-90. doi: 10.1061/(ASCE)SU.1943-5428.0000013

Journal - Research Article

Denys, P. H., Denham, M., & Pearson, C. F. (2007). A geodetic measurement of strain variation across the Central Southern Alps, New Zealand. In P. Tregoning & C. Rizos (Eds.), Dynamic planet: Monitoring and understanding a dynamic planet with geodetic and oceanographic tools. (pp. 445-452). Berlin: Springer.

Chapter in Book - Research

Pearson, C., & Snay, R. (2007). Updating HTDP for two recent earthquakes in California. Surveying & Land Information Science, 67(3), 149-158.

Journal - Research Article

Pearson, C., & Mick, D. (2008). Height datums on the Mississippi and Illinois river systems: An inconvenient feast. Surveying & Land Information Science, 68(1), 15-19.

Journal - Research Article

Pearson, C., Denys, P., Norris, R., & Denham, M. (2011). A geodetic study of the Central Otago Fault System. In N. J. Litchfield & K. Clark (Eds.), Geoscience Society of New Zealand Miscellaneous Publication. 130A, (pp. 83-84). Wellington, New Zealand: GSNZ. [Abstract]

Conference Contribution - Published proceedings: Abstract

Denys, P., Norris, R., Pearson, C., & Denham, M. (2011). A geodetic study of the Otago Fault System of the South Island of New Zealand. Proceedings of the International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth on the Edge: Science for a Sustainable Planet. Retrieved from http://www.iugg2011.com/program.asp

Conference Contribution - Published proceedings: Abstract

Snay, R., & Pearson, C. (2011). HTDP (Horizontal Time-Dependent Positioning) (Version 3.1) [Computer Software]. National Geodetic Survey. Retrieved from http://www.ngs.noaa.gov/TOOLS/Htdp/Htdp.shtml

Software

Pearson, C., Denys, P., Norris, R., & Denham, M. (2012). A geodetic study of Otago and South Westland. In A. Pittari & R. J. Hansen (Eds.), Geoscience Society of New Zealand Miscellaneous Publication. 134A, (pp. 72). Wellington, New Zealand: GSNZ. [Abstract]

Conference Contribution - Published proceedings: Abstract

Pearson, C., Jordan, A., & Denys, P. (2012). PositioNZ-PP: Development of an online GPS post-processing service for New Zealand. Proceedings of the New Zealand Institute of Surveyors (NZIS) 124th Conference: Connecting Spatially. [USB Memory Stick] NZIS. [Abstract]

Conference Contribution - Published proceedings: Abstract

Beavan, J., Pearson, C., & Palmer, N. (2012). Postseismic strain and fault slip in the region between the Darfield and Christchurch earthquakes. In A. Pittari & R. J. Hansen (Eds.), Geoscience Society of New Zealand Miscellaneous Publication. 134A, (pp. 7). Wellington, New Zealand: GSNZ. [Abstract]

Conference Contribution - Published proceedings: Abstract

Denys, P., Pearson, C., & Denham, M. (2005). A geodetic measurement of strain variation across the Southern Alps, New Zealand. Proceedings of the Joint Meeting of the IAG, IAPSO and IABO. (pp. 108). [Abstract]

Conference Contribution - Published proceedings: Abstract

Beavan, R. J., Denham, M., Denys, P. H., Hager, B., Herring, T., Kurnik, C., … Pearson, C. F. (2002). A direct geodetic measurement of the uplift rate of the Southern Alps. Proceedings of the 2002 Western Pacific Geophysics Meeting. 83(22). Retrieved from http://www.agu.org/meetings/waiswp02.html

Conference Contribution - Published proceedings: Abstract

Pearson, C. F., Denys, P. H., & Hodgkinson, K. (2000). Geodetic constraints on the kinematics of the Alpine Fault in the southern South Island of New Zealand, using results from the Hawea-Haast GPS transect. Geophysical Research Letters, 27(9), 1319-1323.

Journal - Research Article

Moore, M. A., Anderson, H. J., & Pearson, C. F. (2000). Seismic and geodetic constraints on plate boundary deformation across the northern Macquarie Ridge and southern South Island of New Zealand. Geophysical Journal International, 143(3), 847-880. doi: 10.1046/j.1365-246X.2000.00282.x

Journal - Research Article

Denys, P. H., Beavan, R. J., Bilham, R., Hager, B., Herring, T., Kurnik, C., … Pearson, C. F. (2000). The South Alps geodetic experiment (SAGENZ): Measuring vertical deformation in New Zealand using GPS and absolute gravity. Proceedings of the Geological Scoiety of New Zealand and New Zealand Geophysical Society Joint Annual Conference. (pp. 35). Wellington: Victoria University. [Abstract]

Conference Contribution - Published proceedings: Abstract

Beavan, J., Moore, M., Pearson, C., Henderson, M., Parsons, B., Bourne, S., … Hodgkinson, K. (1999). Crustal deformation during 1994-1998 due to oblique continential collision in the central Southern Alps, New Zealand, and implications for seismic potential of the Alpine fault. Journal of Geophysical Research, 104(B11), 25233-25256. doi: 10.1029/1999JB900198

Journal - Research Article

Dymock, P., Hannah, J., & Pearson, C. F. (1999). The second Manapouri tailrace tunnel control survey: The integration of GPS and conventional surveying in an area of significant deviation of the vertical. New Zealand Surveyor, (289), 13-18.

Journal - Research Article

Chong, A. K., & Pearson, C. F. (1998). Geometrically rectified images for resource mapping and precision farming. In P. Firns (Ed.), 10th Annual Colloquium of Spatial Information Research Centre (SIRC). (pp. 63-68). Dunedin: University of Otago. [Full Paper]

Conference Contribution - Published proceedings: Full paper

Pearson, C. F. (1998). Preliminary geodetic strain measurements from the South Fiordland region using repeat GPS measurements: Implications for subduction on the Puysegur Trench. Geophysical Research Letters, 25, 3185-3188.

Journal - Research Article

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