We present new developments of the versatile towed transient electromagnetic system (tTEM). The system now meets the demand of near surface mapping down to 100m and is suitable for application not only ground-based but also in aquatic (rivers, lakes etc.) and snow environments. The receiver technology of the system has been upgraded and it has a 4 times lower noise level compared to previous system, increasing the depth of investigation down to 100 m. The latter two system are called FloaTEM and SnowTEM, respectively. FloaTEM surveys were conducted in several parts of United States including the Mississippi delta region for mapping and characterizing the alluvial aquifer system below the river beds. The results show that the FloaTEM system produces detailed subsurface resistivity images in quick time compared to other geophysical methods. We conducted over 300 km of survey along several rivers within a week in the Mississippi delta region. The SnowTEM system uses a 4 turn, 4 m x 4 m transmitter coil and a specially designed low noise receiver coil. It has been put on skies and is towed behind a snow scooter or a snow robot.


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  1. Auken, E., Boesen, T., and Christiansen, A. V.
    , 2017, A Review of Airborne Electromagnetic Methods With Focus on Geotechnical and Hydrological Applications From 2007 to 2017, inNielsen, L., ed., Advances in Geophysics, Volume 58, Academic Press Elsevier, p. Startpage 47.
    [Google Scholar]
  2. Auken, E., Christiansen, A. V., Westergaard, J. A., Kirkegaard, C., Foged, N., and Viezzoli, A.
    , 2009, An integrated processing scheme for high-resolution airborne electromagnetic surveys, the SkyTEM system: Exploration Geophysics, v. 40, p. 184–192.
    [Google Scholar]
  3. Auken, E., Foged, N., Larsen, J., Lassen, K., Maurya, P., Dath, S., and Eiskjœr, T.
    , 2018, tTEM — A towed transient electromagnetic system for detailed 3D imaging of the top 70 m of the subsurface: GEOPHYSICS, p. E13–E22.
    [Google Scholar]
  4. Christiansen, A., Pedersen, J. B., Auken, E., Søe, N. E., Holst, M. K., and Kristiansen, S. M.
    , 2016, Improved Geoarchaeological Mapping with Electromagnetic Induction Instruments from Dedicated Processing and Inversion: Remote Sensing, v. 2016, no. 8, p. 15.
    [Google Scholar]
  5. Foged, N., Auken, E., Christiansen, A. V., and Sørensen, K. I.
    , 2013, Test site calibration and validation of airborne and ground based TEM systems: Geophysics, v. 78, no. 2, p. E95–E106.
    [Google Scholar]
  6. Maurya, P. K., Rønde, V. K., Fiandaca, G., Balbarini, N., Auken, E., Bjerg, P. L., and Christiansen, A. V.
    , 2017, Detailed landfill leachate plume mapping using 2D and 3D electrical resistivity tomography - with correlation to ionic strength measured in screens: Journal of Applied Geophysics, v. 138, p. 1–8.
    [Google Scholar]
  7. Sørensen, K. I., and Auken, E.
    , 2004, SkyTEM - A new high-resolution helicopter transient electromagnetic system: Exploration Geophysics, v. 35, p. 191–199.
    [Google Scholar]
  8. Viezzoli, A., Auken, E., and Munday, T.
    , 2009, Spatially constrained inversion for quasi 3D modelling of airborne electromagnetic data - an application for environmental assessment in the Lower Murray Region of South Australia: Exploration Geophysics, v. 40, p. 173–183.
    [Google Scholar]

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