Peter J. G. Teunissen

Peter J. G. Teunissen
Born (1957-10-09) October 9, 1957
Owerri, Nigeria
Alma materDelft University of Technology
Known forLAMBDA[2] method, GNSS ambiguity resolution
AwardsVening Meinesz Medal, Johannes Kepler Award, IUGG Honorary Fellow
Scientific career
FieldsGeodesy,[1] Satellite Navigation
InstitutionsDelft University of Technology, Curtin University

Peter J. G. Teunissen (born 9 October 1957) is a Dutch geodesist,[3] known for his contributions to satellite navigation and Earth observation. He is particularly recognized for inventing the LAMBDA (Least-squares AMBiguity Decorrelation Adjustment) method, which has become the standard technique for solving integer ambiguities in GNSS carrier‑phase measurements.[4][2]

Early life and education

Teunissen was born in Owerri, Nigeria, on 9 October 1957. He earned his BSc (1978), MSc (1980, cum laude), and PhD (1985, cum laude) in Mathematical and Physical Geodesy from Delft University of Technology.[5]

Academic career

Teunissen has held several academic and leadership positions at Delft University of Technology (TU Delft), including Head of the Department of Geodesy, Vice-Dean of the Faculty of Civil Engineering and Geosciences, and Director of Education.[5]

He led the Earth Observation and Space Systems Department in the Faculty of Aerospace Engineering and later joined Curtin University in Perth, Australia, where he was the Foundation Head of the GNSS Research Centre and served as Science Director of the Cooperative Research Centre for Spatial Information (2009–2019).[6]

He has also served as Distinguished Visiting Chair Professor at Hong Kong Polytechnic University.[6]

Teunissen is currently emeritus Professor of Geodesy and Satellite Navigation at TU Delft and Vice-President of the International Association of Geodesy. He was the founding Editor-in-Chief of the Journal of Geodesy and serves on several editorial boards.[5]

Research

Teunissen is the originator of the Least-squares AMBiguity Decorrelation Adjustment (LAMBDA) method,[4][2] a key development in GNSS positioning. His research focuses on satellite navigation, mixed-integer estimation, quality control, and precise positioning with multi-GNSS constellations, including GPS, GLONASS, Galileo, BeiDou, and IRNSS.[5]

He has authored and co-authored numerous publications, including:

  • GPS for Geodesy[7] (with A. Kleusberg)
  • Adjustment Theory[8] and Testing Theory[9]
  • Springer Handbook of Global Navigation Satellite Systems[10] (with O. Montenbruck)

Awards and honours

Teunissen has received multiple international awards, including:

Selected publications

  • Teunissen, P.J.G. & Kleusberg, A. (Eds.), GPS for Geodesy, Springer.[7]
  • Teunissen, P.J.G. & Montenbruck, O. (Eds.), Springer Handbook of Global Navigation Satellite Systems, Springer.[10]
  • Multiple journal articles on GNSS ambiguity resolution, integer estimation, and geodetic theory.[12][13][14][15][16]

References

  1. ^ "Geodesy". Encyclopaedia Britannica. Retrieved 2025-07-03.
  2. ^ a b c Teunissen, Peter J.G. (1993). "Least-squares estimation of the integer GPS ambiguities". Invited lecture, Section IV: Theory and Methodology, IAG General Meeting, Beijing, China, pp. 1–16.
  3. ^ Sansò, Fernando (2000). "The Role of the Geodesist Today". Journal of Geodesy. 74 (6): 389–397. doi:10.1007/s001900000103.
  4. ^ a b \[1](https://www.ion.org/awards/2014-ionfellow-teunissen.cfm) Institute of Navigation Fellow citation – invention of the LAMBDA method]
  5. ^ a b c d e f g h i https://iugg.org/wp-content/uploads/2023/10/2023_IUGG_Fellow_Peter_Teunissen_CV.pdf IUGG 2023 Honorary Fellow CV – Peter Teunissen
  6. ^ a b https://www.polyu.edu.hk/lsgi/People/Distinguished-Chair-Professors-Emeritus/Prof-Teunissen-Petrus Profile – The Hong Kong Polytechnic University
  7. ^ a b Kleusberg, Alfred; Teunissen, Peter J. G., eds. (1998). GPS for Geodesy (2nd ed.). Springer Berlin Heidelberg. Lecture Notes in Earth Sciences, Vol. 60. ISBN 978‑3‑642‑72013‑0.
  8. ^ Teunissen, P.J.G. (2000; 2nd ed. 2024). Adjustment Theory: An Introduction. Series on Mathematical Geodesy and Positioning. VSSD Press; TU Delft OPEN Publishing. ISBN 978‑94‑6366‑885‑9. doi:10.59490/tb.95.
  9. ^ Teunissen, P.J.G. (2000; 2nd ed. 2006; 3rd ed. 2024). Testing Theory: An Introduction. Series on Mathematical Geodesy and Positioning. VSSD Press; TU Delft OPEN Publishing. ISBN 978‑90‑407‑1975‑2; ISBN 978‑94‑6366‑892‑7. doi:10.59490/tb.96.
  10. ^ a b Teunissen, Peter J.G.; Montenbruck, Oliver (eds.) (2017). Springer Handbook of Global Navigation Satellite Systems. Springer International Publishing. ISBN 978‑3‑319‑42928‑1.
  11. ^ https://www.egu.eu/awards-medals/vening-meinesz/2022/peter-jg-teunissen/ EGU – Vening Meinesz Medal 2022 – Peter Teunissen
  12. ^ Teunissen, Peter J.G. (1998). "Success probability of integer GPS ambiguity rounding and bootstrapping". Journal of Geodesy. 72 (10): 606–612. doi:10.1007/s001900050197.
  13. ^ Teunissen, P.J.G.; Amiri-Simkooei, A.R. (2008). "Least-squares variance component estimation". Journal of Geodesy. 82 (2): 65–82. doi:10.1007/s00190-007-0157-x.
  14. ^ Teunissen, P.J.G. (1999). "An optimality property of the integer least-squares estimator". Journal of Geodesy. 73 (11): 587–593. doi:10.1007/s001900050269.
  15. ^ Teunissen, P.J.G. (1998). "Success probability of integer GPS ambiguity rounding and bootstrapping". Journal of Geodesy. 72 (8): 606–612. doi:10.1007/s001900050199.
  16. ^ Teunissen, P.J.G.; Massarweh, L. (2025). "Theory for the ambiguity function method: probability model and global solution". Journal of Geodesy. 99: 28. doi:10.1007/s00190-025-01945-7.
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