CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Exploration Geophysics   
Exploration Geophysics
  The Journal of the Australian Society of Exploration Geophysicists
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Committee
For Advertisers
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Sample Issue
For Authors
General Information
Instructions to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review an Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with CP
blank image
facebook twitter youtube

red arrow Submit Article
blank image
Use the online submission system to send us your paper.

red arrow Preview
blank image
Preview, the Magazine of the Australian Society of Exploration Geophysicists, is also available online.

red arrow ASEG Extended Abstracts
blank image
ASEG Extended Abstracts, drawn from the ASEG´s conferencces, is also available online.


Article << Previous     |     Next >>   Contents Vol 40(2)

An integrated processing scheme for high-resolution airborne electromagnetic surveys, the SkyTEM system

Esben Auken 1 5, Anders Vest Christiansen 2, Joakim H. Westergaard 3, Casper Kirkegaard 1, Nikolaj Foged 1, Andrea Viezzoli 4

1 The Hydrogeophysics Group, Department of Earth Sciences, University of Aarhus, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark.
2 Geological Survey of Denmark and Greenland – GEUS, Department of Groundwater Mapping, Lyseng Alle 1, DK-8270, Højbjerg, Denmark.
3 Orbicon A/S, Department of Water Resources and Applied Geophysics, Jens Juuls Vej 16, DK-8260, Viby J, Denmark.
4 Aarhus Geophysics, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark.
5 Corresponding author. Email: esben.auken@geo.au.dk
PDF (1.8 MB) $25
 Export Citation


The SkyTEM helicopter-borne transient electromagnetic system was developed in 2004. The system yields unbiased data from 10 to 12 μs after transmitter current turn-off. The system is equipped with several devices enabling a complete modelling of the movement of the system in the air, facilitating excellent high-resolution images of the subsurface.

An integrated processing and inversion system for SkyTEM data is discussed. While the authors apply this system with SkyTEM data, most of the techniques are applicable for airborne electromagnetic data in general. Altitude data are processed using a simple recursive filtering technique that efficiently removes reflections from trees. The technique is completely general and can be used to filter altitude data from any airborne system. Raw voltage data that are influenced by electromagnetic coupling to man-made structures are culled from the dataset to avoid uncoupled data being distorted by coupled data, and geometrical corrections are applied to correct for pitch and roll of the transmitter frame. Data are de-spiked and averaged using trapezoid-shaped filter kernels. A Laterally Constrained Inversion using smooth models is actively used to evaluate the processing, and the final inversion is tightly connected to the processing procedures.

Keywords: airborne electromagnetic, altitude processing, constrained inversion, SkyTEM.

Subscriber Login

Legal & Privacy | Contact Us | Help


© CSIRO 1996-2015