Comparison of near-surface sensitivity functions of airborne and ground-based em systems

L. M. Madsen, K. V. Lassen, E. Auken, A. V. Christiansen

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingspeer-review

3 Citations (Scopus)

Abstract

Knowledge of the sensitivity function of an electromagnetic (EM) system helps to assess the advantages and shortcomings of the system set-up. We have computed 3D sensitivity functions of three different EM systems - one airborne (SkyTEM) and two ground-based systems (tTEM and GCM) - in order to compare the sensitivity distribution of the different transmitter-receiver set-ups. The results show that the GCM has the highest sensitivity to near-surface structures, but also has a very limited footprint depth. The SkyTEM and tTEM systems have comparable sensitivities vertically in the ground with a 90% footprint depth around 5 m for early time measurements. However, the sensitivity of the SkyTEM system is distributed must wider horizontally than the tTEM.

Original languageEnglish
Title of host publication2nd European Airborne Electromagnetics Conference 2017, Held at Near Surface Geoscience Conference and Exhibition 2017
PublisherEuropean Association of Geoscientists and Engineers
Pages11-15
Number of pages5
ISBN (Electronic)9781510850804
DOIs
Publication statusPublished - 2017
Event2nd European Airborne Electromagnetics Conference 2017 - Malmo, Sweden
Duration: 3 Sep 20177 Sep 2017

Publication series

Name2nd European Airborne Electromagnetics Conference 2017, Held at Near Surface Geoscience Conference and Exhibition 2017

Conference

Conference2nd European Airborne Electromagnetics Conference 2017
Country/TerritorySweden
CityMalmo
Period3/09/177/09/17

Programme Area

  • Programme Area 2: Water Resources

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