All Stories

  1. Linear filter theory for the forward Laplace transform and its use in calculating 1D EM responses

    Article • Computers & Geosciences, April 2025, Elsevier

    Niels Christensen

  2. A fast hybrid 1D inversion approach for ground conductivity data

    Article • Near Surface Geophysics, December 2024, Wiley

    Niels Christensen

  3. Joint inversion of airborne TEM data and surface geoelectrical data. The Egebjerg case

    Article • Journal of Applied Geophysics, January 2022, Elsevier

    Niels Christensen

  4. Resolution attributes for geophysical inversion models: Depth of investigation and novel measures

    Article • Near Surface Geophysics, December 2021, Wiley

    Niels Christensen

  5. Using geophysical survey results in the inference of aquifer vulnerability measures

    Article • Near Surface Geophysics, August 2021, Wiley

    Niels Christensen

  6. Multiparametric coupling and constrained interpolation to improve natural recharge estimation

    Article • Journal of Earth System Science, December 2019, Springer Science + Business Media

    Niels Christensen

  7. Interpretation attributes derived from airborne electromagnetic inversion models using the continuous wavelet transform

    Article • Near Surface Geophysics, November 2018, Wiley

    Niels Christensen

  8. Fast 3D multichannel deconvolution of electromagnetic induction loop-loop apparent conductivity data sets acquired at low induction numbers

    Article • Geophysics, November 2017, Society of Exploration Geophysicists

    Niels Christensen

  9. A novel approach to comparing AEM inversion results with borehole conductivity logs

    Article • Exploration Geophysics, January 2017, CSIRO Publishing

    Niels Christensen

  10. Comparing Test Line Inversion Results from Different Helicopterborne Transient Instruments with Regard to Hydrogeological Mapping

    Article • ASEG Extended Abstracts, January 2016, CSIRO Publishing

    Niels Christensen

  11. Derivative analysis of geophysical borehole traces

    Article • ASEG Extended Abstracts, January 2015, CSIRO Publishing

    Niels Christensen

  12. TEM sensitivity functions

    Article • Geophysics, July 2014, Society of Exploration Geophysicists

    Niels Christensen

  13. Mapping pollution and coastal hydrogeology with helicopterborne transient electromagnetic measurements

    Article • Exploration Geophysics, January 2014, CSIRO Publishing

    Niels Christensen

  14. Derivative analysis for layer selection of geophysical borehole logs

    Article • Computers & Geosciences, October 2013, Elsevier

    Niels Christensen

  15. SkyTEM helicopter transient electromagnetic surveys of tailings dams

    Article • ASEG Extended Abstracts, January 2012, CSIRO Publishing

    Niels Christensen

  16. A lateral model parameter correlation procedure for one-dimensional inverse modelling

    Article • Geophysical Prospecting, September 2009, Wiley

    Niels Christensen

  17. Preface to the Special Issue on Airborne Geophysics

    Article • Journal of Applied Geophysics, March 2009, Elsevier

    Niels Christensen

  18. The AC-geoelectrical sounding method: a combined electric/electromagnetic prospecting tool

    Article • Boreas, January 2008, Wiley

    Niels Christensen

  19. 1D inversion and resolution analysis of marine CSEM data

    Article • Geophysics, March 2007, Society of Exploration Geophysicists

    Niels Christensen

  20. A survey of current trends in near-surface electrical and electromagnetic methods

    Article • Geophysics, September 2006, Society of Exploration Geophysicists

    Niels Christensen

  21. A New Inversion Scheme for Helicopterborne Electromagnetic Data

    Article • January 2006, Society of Exploration Geophysicists

    Niels Christensen

  22. Approximate 2D inversion of airborne TEM data

    Article • ASEG Extended Abstracts, January 2006, CSIRO Publishing

    Niels Christensen

  23. A quantitative appraisal of airborne and ground‐based transient electromagnetic (TEM) measurements in Denmark

    Article • Geophysics, March 2003, Society of Exploration Geophysicists

    Niels Christensen

  24. Approximate 2D Inversion of AEM Data

    Article • ASEG Extended Abstracts, January 2003, CSIRO Publishing

    Niels Christensen

  25. A generic 1-D imaging method for transient electromagnetic data

    Article • Geophysics, March 2002, Society of Exploration Geophysicists

    Niels Christensen

  26. Pulled array continuous electrical sounding with an additional inductive source: an experimental design study

    Article • Geophysical Prospecting, March 2001, Wiley

    Niels Christensen

  27. Difficulties in determining electrical anisotropy in subsurface investigations

    Article • Geophysical Prospecting, January 2000, Wiley

    Niels Christensen

  28. The Determination of Electrical Anisotropy Using Surface Electric and Electromagnetic Methods

    Article • January 1998, Society of Exploration Geophysicists

    Niels Christensen

  29. Two‐Dimensional Imaging of Transient Electromagnetic Soundings

    Article • January 1997, Society of Exploration Geophysicists

    Niels Christensen

  30. Comment on 'The fast Hankel transform' by Adel A. Mohsen and E.A. Hashish1

    Article • Geophysical Prospecting, May 1996, Wiley

    Niels Christensen

  31. 2D Inversion of Resistivity Profile Data

    Article • January 1996, Society of Exploration Geophysicists

    Niels Christensen

  32. Pulled Array Continuous Vertical Electrical Sounding (PA‐CVES) with an Additional Inductive Source

    Article • January 1996, Society of Exploration Geophysicists

    Niels Christensen

  33. 1D Imaging of Central Loop Transient Electromagnetic Soundings

    Article • Journal of Environmental and Engineering Geophysics, July 1995, Society of Exploration Geophysicists

    Niels Christensen

  34. Imaging and Inversion of Transient Electromagnetic Soundings

    Article • January 1995, Society of Exploration Geophysicists

    Niels Christensen

  35. Large Scale Hydrogeological Investigation in the Beder Area — A Case Study

    Article • January 1994, Society of Exploration Geophysicists

    Niels Christensen

  36. Integrated Use of Electromagnetic Methods for Hydrogeological Investigations

    Article • January 1994, Society of Exploration Geophysicists

    Niels Christensen

  37. Geophysical methods in environmental studies in Denmark. A review

    Article • Journal of Applied Geophysics, February 1992, Elsevier

    Niels Christensen

  38. The AC-geoelectrical method as a tool for mapping saline groundwater

    Article • Journal of Applied Geophysics, February 1992, Elsevier

    Niels Christensen

  39. REPLY TO COMMENT BY WALTER L. ANDERSON1

    Article • Geophysical Prospecting, April 1991, Wiley

    Niels Christensen

  40. OPTIMIZED FAST HANKEL TRANSFORM FILTERS1

    Article • Geophysical Prospecting, July 1990, Wiley

    Niels Christensen

  41. An investigation of the marine electrical sounding method — is the method applicable for prospecting in near-coast regions in Denmark?

    Article • Geoexploration, July 1983, Elsevier

    Niels Christensen

  42. Imaging of transient electromagnetic soundings using a scaling approximate fréchet derivative

    Article • Springer Science + Business Media

    Niels Christensen

  43. Deconvolution of geophysical multioffset resistivity profile data

    Article • Springer Science + Business Media

    Niels Christensen

  44. Inversion of transient hydraulic head variation caused by a controlled point source

    Article • Springer Science + Business Media

    Niels Christensen