T. Wittwer. De keuze van het kansmodel in de geodetische netwerkvereffening. Download

T. Wittwer, N. Schaefers. Innovatie in de Landmeetkunde. Geo-Info 3/2020.

T. Wittwer, D. Sparla. GeoNext brengt perronranden en spoorassen in kaart. GIS Magazine 7/2018.

T. Wittwer. Automatisierte Gleisvermessung in Punktwolken vom mobilem Laserscanning. Zeitschrift für Vermessungswesen 2/2018. Link

T. Wittwer. Van panoramafoto tot 3D-mesh en puntenwolk. GIS Magazine 1/2018.

T. Wittwer. Trimble TX8. GIS Magazine 6/2015.

T. Wittwer. A comparison of freely available point cloud viewers for Windows.

T. Wittwer. Connect & Construct. STUMICO Nieuwsbrief 113.

T. Wittwer, H. Pauw. BIM & GIS: Een perfect huwelijk. STUMICO Nieuwsbrief 111.

T. Wittwer. Wat kan het AHN2 betekenen voor BGT? Onderzoeksrapport voor Het Waterschaphuis, 2012.

T. Wittwer. Regional gravity field modelling with radial basis functions. PhD Thesis, TU Delft, 2009. Link

B.C. Gunter, T. Wittwer, W. Stolk, R. Klees, P. Ditmar. Comparison of regional and global GRACE models at high latitudes. Proceedings IAG 2009.

R. Tenzer, R. Klees, T. Wittwer. Local gravity field modelling in rugged terrain using spherical radial basis functions – Case study for the Canadian Rocky Mountains. Proceedings IAG 2009.

T. Wittwer. Direct transformation of GPS coordinates and baselines into a local coordinate system. Unpublished.

R.Klees, X. Liu, T. Wittwer, B.C. Gunter, E. Revtova, R. Tenzer, P. Ditmar, H.C. Winsemius, H.H.G. Savenije. A comparison of global and regional GRACE models for land hydrology. Surveys in Geophysics 29, 335-359. DOI: 10.1007/s10712-008-9049-8.

T. Wittwer. Choosing the optimal BLAS and LAPACK library. Unpublished.

R. Klees, I. Prutkin, R. Tenzer, T. Wittwer. A data-driven approach to local gravity field modelling using spherical radial basis functions. Journal of Geodesy 82, 457-471. DOI 10.1007/s00190-007-0196-3.

R. Tenzer, R. Klees, I. Prutkin, T. Wittwer, B. Alberts, U. Schirmer, J. Ihde, G. Liebsch, U. Schäfer. Comparison of techniques for the computation of a height reference surface from gravity and GPS/levelling data. Proceedings IUGG 2007 Earth – Our Changing Planet, Peruggia, Italy.

T.Wittwer, R. Klees, K. Seitz, and B. Heck. Ultra-high degree spherical harmonic analysis and synthesis using extended-range arithmetic. Journal of Geodesy 82, 223-229. DOI 10.1007/s00190-007-0172-y.

R. Klees, I. Prutkin, R. Tenzer, T. Wittwer. Development of a technique for combining parameters of the Earth’s gravity field for quasi-geoid determination on the territory of the Federal Republic of Germany and Europe: Final report, Delft, 2007, 62 pages.

R. Klees and T. Wittwer. A data-adaptive design of a spherical basis function network for gravity field modeling. Dynamic Planet 2005, ‘Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools’, pp. 322-328. Springer 2006, ISBN 3-540-49349-5.

R. Klees and T. Wittwer. Local gravity field modelling with multi-pole wavelets. Dynamic Planet 2005, ‘Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools’, pp. 303-308. Springer 2006, ISBN 3-540-49349-5.

T. Wittwer. An Introduction to Parallel Programming. VSSD uitgeverij, Delft, the Netherlands, ISBN 90-71301-78-8. Download PDF. Download source code. Download data.

R. Klees, A. Marchenko, B. Alberts, T. Wittwer, and P. Ditmar. Comparison of various methods for the inversion of airborne gravity data. Proceedings Dynamic Planet 2005, ‘Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools’, 6 pages.

R. Klees, T. Wittwer, B. Alberts, and P. Ditmar. Local gravity field modelling from scattered data using multipole wavelets. Geophysical Research Abstracts, 7.

T. Wittwer. High Performance Computing im Einsatz zur Schwerefeldanalyse mit CHAMP, GRACE und GOCE. Diplomarbeit, Universität Stuttgart.

T. Wittwer. Interpolation und Verdichtung von Satellitengradiometriedaten. Studienarbeit, Universität Stuttgart.

T. Wittwer. Neuvermessung des Testnetzes Vaihingen und Vergleich mit der Epoche von 1999. Studienarbeit, Universität Stuttgart. Download.