Dr.-Ing. Christian Hirt

Lehrstuhl für Astronomische und Physikalische Geodäsie
Technische Universität München
Arcisstr. 21
80333 München

Raum: 2621
Tel: +49 89 / 289 231 98
Fax: 
 
E-Mail: c.hirt@tum.de

Publikationen

2018

  • Bucha, B; Hirt, C.; Kuhn, M.: Cap integration in spectral gravity forward modelling: Near- and far-zone gravity effects via Molodensky’s truncation coefficients. Journal of Geoesy, 2018 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.: Artefact detection in global digital elevation models (DEMs): The maximum slope approach and its application for complete screening of the SRTM v4.1 and MERIT DEMs. Remote Sensing of Environment 207, 2018, 27-41 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, Christian; Wildermann, Eugen: Reactivation of the Venezuelan vertical deflection data set from classical astrogeodetic observations. Journal of South American Earth Sciences 85, 2018, 97-107 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Rexer, Moritz; Hirt, Christian; Bucha, Blažej; Holmes, Simon: Solution to the spectral filter problem of residual terrain modelling (RTM). Journal of Geodesy 92 (6), 2018, 675--690 mehr… BibTeX Volltext ( DOI )
  • Schack, P.; Hirt, C.; Hauk, M.; Featherstone, W. E.; Lyon, T. J.; Guillaume, S.: A high-precision digital astrogeodetic traverse in an area of steep geoid gradients close to the coast of Perth, Western Australia. Journal of Geodesy 92 (10), 2018, 1143--1153 mehr… BibTeX Volltext ( DOI )
  • Tenzer, R.; Foroughi, I.; Sjöberg, L.E.; Bagherbandi, M.; Hirt, C.; Pitoňák, M.: Definition of Physical Height Systems for Telluric Planets and Moons. Surveys in Geophysics, 2018 mehr… BibTeX Volltext ( DOI )
  • Yang, Meng; Hirt, Christian; Tenzer, Robert; Pail, Roland: Experiences with the use of mass-density maps in residual gravity forward modelling. Studia Geophysica et Geodaetica 62 (4), 2018, 596--623 mehr… BibTeX Volltext ( DOI )

2017

  • Hirt, C.; Kuhn, M.: Convergence and divergence in spherical harmonic series of the gravitational field generated by high‐resolution planetary topography – a case study for the Moon. Journal of Geophysical Research – Planets 2017 (122), 2017 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, Christian: Topographische Modellierung des Gravitationsfeldes. In: Rummel, Reiner (Hrsg.): Erdmessung und Satellitengeodäsie: Handbuch der Geodäsie, herausgegeben von Willi Freeden und Reiner Rummel. Springer Berlin Heidelberg, 2017, 259--294 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, Christian; Rexer, Moritz; Claessens, Sten; Rummel, Reiner: The relation between degree-2160 spectral models of Earth's gravitational and topographic potential: a guide on global correlation measures and their dependency on approximation effects. Journal of Geodesy 91 (10), 2017, 1179--1205 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)

2016

2015

  • Claessens, S.J.; Hirt, C.: A surface spherical harmonic expansion of gravity anomalies on the ellipsoid. Journal of Geodesy 89 (10), 2015, 1035-1048 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Rexer, M.: Earth2014: 1' shape, topography, bedrock and ice-sheet models - Available as gridded data and degree 10,800 spherical harmonics. International Journal of Applied Earth Observation and Geoinformation 39, 2015, 103-112 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Rexer, M.; Claessens, S.: Topographic evaluation of fifth‐generation GOCE gravity field models – globally and regionally. In: Newton's Bulletin 5, Special issue on validation of GOCE gravity fields, International Association of Geodesy. IAG, 2015, 1-24 mehr… BibTeX Volltext (mediaTUM)
  • Rexer, M.; Hirt, C.: Ultra-high-Degree Surface Spherical Harmonic Analysis Using the Gauss-Legendre and the Driscoll/Healy Quadrature Theorem and Application to Planetary Topography Models of Earth, Mars and Moon. Surveys in Geophysics 36 (6), 2015, 803-830 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Rexer, M.; Hirt, C.: Spectral analysis of the Earth’s topographic potential via 2D-DFT: a new data-based degree variance model to degree 90,000. Journal of Geodesy 89 (9), 2015, 887-909 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Rexer, M.; Hirt, C.; Claessens, S.; Braitenberg, C.: Use of topography in the context of the GOCE satellite mission - some examples. Proc. '5th International GOCE User Workshop', Paris, France, 25-28 November 2014, ESA Communications, 2015 mehr… BibTeX Volltext (mediaTUM)
  • Tenzer, R.; Hirt, C.; Claessens, S.J.; Novák, P.: Spatial and spectral representations of the geoid-to-quasigeoid correction. Surveys in Geophysics 36 (5, 627-658), 2015 mehr… BibTeX Volltext ( DOI )

2014

  • Hirt, C.: GOCE’s view below the ice of Antarctica: Satellite gravimetry confirms improvements in Bedmap2 bedrock knowledge. Geophysical Research Letters 41 (14), 2014, 5021- 5028 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Kuhn, M.: A band-limited topographic mass distribution generates a full-spectrum gravity field – gravity forward modelling in the spectral and spatial domain revisited. Journal of Geophysical Research (JGR) – Solid Earth 119 (4), 2014, 3646–3661 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Kuhn, M.; Claessens, S.; Pail, R.; Seitz, K.; Gruber, Th.: Study of the Earth׳s short-scale gravity field using the ERTM2160 gravity model. Computers & Geosciences 73, 2014, 71-80 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Papp, G.; Pal, A.; Benedek, J.; Szucs, E.: Expected accuracy of tilt measurements on a novel hexapod-based Digital Zenith Camera System – a Monte Carlo simulation study. Measurement Science Technology 25 (085004), 2014 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Rexer, M.; Hirt, C.: Comparison of free high resolution digital elevation data sets (ASTER GDEM2, SRTM v2.1/v4.1) and validation against accurate heights from the Australian National Gravity Database. Australian Journal of Earth Sciences, 2014, 1-15 mehr… BibTeX Volltext ( DOI )

2013

2012

2011

2010

  • Hirt, C.: Prediction of vertical deflections from high-degree spherical harmonic synthesis and residual terrain model data. Journal of Geodesy 84 (3), 2010, 179-190 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Bürki, B.; Somieski, A.; Seeber, G.: Modern determination of vertical deflections using digital zenith cameras. Journal Surveying Engineering 136 (1), 2010, 1-12 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Featherstone, W.E.; Marti, U.: Combining EGM2008 and SRTM/DTM2006.0 residual terrain model data to improve quasigeoid computations in mountainous areas devoid of gravity data. Journal of Geodesy 84 (9), 2010, 557-567 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Filmer, M.S.; Featherstone, W.E.: Comparison and validation of recent freelyavailable ASTER-GDEM ver1, SRTM ver4.1 and GEODATA DEM-9S ver3 digital elevation models over Australia. Australian Journal of Earth Sciences 57 (3), 2010, 337 -347 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Guillaume, S.; Wisbar, A.; Bürki, B.; Sternberg, H.: Monitoring of the refraction coefficient of the lower atmosphere using a controlled set-up of simultaneous reciprocal vertical angle measurements. Journal of Geophysical Research (JGR) - Atmospheres 115, 2010, D21102 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)
  • Hirt, C.; Marti, U.; Bürki, B.; Featherstone, W.E.: Assessment of EGM2008 in Europe using accurate astrogeodetic vertical deflections and omission error estimates from SRTM/DTM2006.0 residual terrain model data. Journal Geophysical Research (JGR) – Solid Earth 115, 2010, B10404 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)

2009

  • Flury, J.; Gerlach, C.; Hirt, C.; Schirmer, U.: Heights in the Bavarian Alps: mutual validation of GPS, levelling, gravimetric and astrogeodetic quasigeoids. Geodetic Reference Frames, IAG Symposia, Springer, 2009 mehr… BibTeX Volltext ( DOI ) Volltext (mediaTUM)

2008

2007

  • Hirt, C.; Denker, H.; Flury, J.; Lindau, A.; Seeber, G.: Astrogeodetic validation of gravimetric quasigeoid models in the German Alps - first results. Proceedings of the 1st International Symposium of the International Gravity Field Service, Istanbul 2006, Harita Dergisi, Special Issue, 2007 mehr… BibTeX Volltext (mediaTUM)

Vorträge & Poster

2018

  • Albayrak, M.; Hirt, C.; Guillaume, S.; Hauk, M.; Halicioglu, K.: Testing the QDaedalus Measurement System for Astrogeodetic Observations of the Gravity Field. American Geophysical Union Fall Meeting, 2018 mehr… BibTeX
  • Rexer, M.; Hirt, C.; Bucha, B.: Spectrally complete residual terrain modelling (RTM) – On solving an often neglected filter problem. European Geosciences Union General Assembly, 2018 mehr… BibTeX
  • Schack, P.; Hirt, C.; Hauk, M.; Featherstone, W.; Lyon, T.; Guillaume, S.: The first high-precision digital astrogeodetic traverse in the Southern Hemisphere. European Geosciences Union General Assembly, 2018 mehr… BibTeX
  • Schack, P.; Hirt, C.; Hauk, M.; Featherstone, W.E.; Lyon, T.J.; Guillaume, S.: A high-precision digital astrogeodetic traverse in a coastal area of steep geoid gradients. International Symposium Gravity, Geoid and Height Systems 2, 2018 mehr… BibTeX
  • Yang, M.; Hirt, C.; Pail, R.: The tree canopy effect in high-frequency gravity forward modelling. European Geosciences Union General Assembly, 2018 mehr… BibTeX

2017

  • Kelly, K.; Hirt, C.; Kuhn, M.; Barzaghi, R.: International Digital Elevation Model Service (IDEMS): A Revived IAG Service. Joint Scientific Assembly of the International Association of Geodesy and the International Association of Seismology and Physics of the Earth's Interior, 2017 mehr… BibTeX
  • Rexer, M.; Hirt, C.; Pail, R.: High-resolution global forward modelling - A degree-5480 global ellipsoidal topographic potential model. European Geosciences Union General Assembly 2017, 2017 mehr… BibTeX

2016

  • Hirt, C.; Pail, R.; Rexer, M.: Ultra-high resolution modelling of the Earth's gravity field. Living Planet Symposium 2016, 2016 mehr… BibTeX
  • Hirt, C.; Rexer, M.: The 1 arc-min resolution Earth2014 global topography model. International Symposium on Gravity, Geoid and Height System 2016 - 1st Joint Commission 2 and IGFS Meeting, 2016 mehr… BibTeX
  • Kuhn, M.; Hirt, C.: Examination of approximation by Rock-Equivalent Topography (RET)for the topographic gravitational potential and its first and second derivatives. International Symposium on Gravity, Geoid and Height System 2016 - 1st Joint Commission 2 and IGFS Meeting, 2016 mehr… BibTeX
  • Reußner, E.; Hirt, C.; Rexer, M.; Kuhn, M.: Characterisation of the gravity field generated by a degree-2160 topography model. International Symposium on Gravity, Geoid and Height System 2016 - 1st Joint Commission 2 and IGFS Meeting, 2016 mehr… BibTeX
  • Rexer, M.; Claessens, S.; Hirt, C.: Convergence in spectral forward modelling - Binominal series solution vs. direct integral solution at high degrees. European Geosciences Union General Assembly 2016, 2016 mehr… BibTeX
  • Rexer, M.; Hirt, C.: Ultra-high degree spectral modelling of Earth and planetary topography. European Geosciences Union General Assembly 2016, 2016 mehr… BibTeX
  • Rexer, M.; Hirt, C.; Claessens, S.; Tenzer, R.: A framework for layer-based spectral forward modelling of Earth's gravitational field w.r.t. a reference sphere and a reference ellipsoid. International Symposium on Gravity, Geoid and Height System 2016 - 1st Joint Commission 2 and IGFS Meeting, 2016 mehr… BibTeX

2015

  • Hirt, C.; Pail, R.; Rexer, M.: Ultra-high resolution modelling of the Earth's gravity field. TUM-IAS General Assembly, Garching, April 23-24, 2015, 2015 mehr… BibTeX
  • Hirt, C.; Rexer, M.: The new Earth2014 suite of shape, topography, bedrock and ice-sheet models: available as 1-arcmin gridded data and degree-10,800 spherical harmonics. 26th IUGG General Assembly 2015, 2015 mehr… BibTeX
  • Rexer, M.; Hirt, C.: Estimating degree variances and omission errors at ultra-short scales - 2D-DFT spectral analysis of the topographic potential based on GGMplus gravity maps. 26th IUGG General Assembly 2015, 2015 mehr… BibTeX
  • Rexer, M.; Hirt, C.; Claessens, S.: Extension of the SHTOOLS-Software-Package for ultra-high spherical harmonic computations - A step towards potential modelling to d/o 21,600. 26th IUGG General Assembly 2015, 2015 mehr… BibTeX

2014

  • Hauk, M.; Ackermann, C.; Hirt, C.: Erprobung des astrogeodätischen Messsystems QDaedalus zur Bestimmung von genauen Lotabweichungen. Geodätische Woche, 2014 mehr… BibTeX
  • Hirt, C.; Pail, R.; Rexer, M.: Ultra-high resolution modelling of the Earth's gravity field. TUM-IAS General Assembly, Garching, April 10-11, 2014, 2014 mehr… BibTeX
  • Rexer, M.; Hirt, C.; Claessens, S.; Braitenberg, C.: Use of topography in the context of the GOCE satellite mission - some examples. 5th International GOCE User Workshop, 2014 mehr… BibTeX

2013

  • Hirt, C.; Kuhn, M.; Claessens, S.; Rexer, M.; Pail, R.; Fecher, T.: Local-­‐resolution gravity modelling on a global scale – towards a 200m-­‐resolution Earth gravity model. IAG Scientific Assembly 2013, 2013 mehr… BibTeX
  • Rexer, M.; Hirt, C.; Bonvalot, S.; Bruinsma, S.; Pail, R.; Kuhn, M.: Evaluation of GOCE satellite gravimetry using BGI ground gravity observations over Africa, Asia and South America. AGU Fall Meeting, 2013 mehr… BibTeX

2006

  • Flury, J.; Gerlach, C.; Hirt, Ch.; Schirmer, U.: Heights in the Bavarian Alps: Mutual validation of GPS, levelling, gravimetric and astrogeodetic quasigeoid. GRF2006 - Geodetic Reference Frames, 2006 mehr… BibTeX
  • Flury, J.; Gerlach, C.; Hirt, Ch.; Schirmer, U.: Heights in the Bavarian Alps: Mutual validation of GPS, levelling, gravimetric and astrogeodetic quasigeoid. Geodätische Woche 2006, 2006 mehr… BibTeX

Betreute Arbeiten

2017

  • Rexer, Moritz : Spectral Solutions to the Topographic Potential in the context of High-Resolution Global Gravity Field Modelling. Dissertation, 2017 mehr… BibTeX Volltext (mediaTUM)

2016

  • Schramm, Sonja: Vergleich sphärisch-harmonischer Modelle des topographischen Gravitationspotentials. Bachelorarbeit, 2016 mehr… BibTeX

2015

  • Reußner, Elisabeth: Untersuchungen zur ultra-hochauflösenden Modellierung des topographischen Potentials mit spektralen Methoden. Masterarbeit, 2015 mehr… BibTeX

2014

  • Hauk, Markus: Erprobung des astrogeodätischen Messsystems QDaedalus zur Bestimmung von genauen Lotabweichungen. Masterarbeit, 2014 mehr… BibTeX
  • Stephan, Barbara: Bewertung aktueller und hochauflösender Modelle der Erdoberfläche - Topographie, Bathymetrie und Eiskappen. Bachelorarbeit, 2014 mehr… BibTeX