TY - GEN
T1 - Comparison of near-surface sensitivity functions of airborne and ground-based em systems
AU - Madsen, L. M.
AU - Lassen, K. V.
AU - Auken, E.
AU - Christiansen, A. V.
N1 - Funding Information:
This study was supported by the TopSoil (InterReg VB North Sea) and rOpen (Innovation Fund Denmark) projects.
PY - 2017
Y1 - 2017
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85039851248&partnerID=8YFLogxK
U2 - 10.3997/2214-4609.201702150
DO - 10.3997/2214-4609.201702150
M3 - Conference article in proceedings
AN - SCOPUS:85039851248
T3 - 2nd European Airborne Electromagnetics Conference 2017, Held at Near Surface Geoscience Conference and Exhibition 2017
SP - 11
EP - 15
BT - 2nd European Airborne Electromagnetics Conference 2017, Held at Near Surface Geoscience Conference and Exhibition 2017
PB - European Association of Geoscientists and Engineers, EAGE
T2 - 2nd European Airborne Electromagnetics Conference 2017
Y2 - 3 September 2017 through 7 September 2017
ER -