Efficient 2D hybrid inversion of airborne frequency domain data

E. Auken, T. Boesen, A. V.C. Christiansen, G. F. Fiandaca, A. A. Pfaffhuber, M. V. Vöge

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

Abstract

We present a 2D inversion code for frequency-domain HEM data designed for inverting field scale surveys on normal desktop computers. The fundamental algorithm is a 2.5D algorithm with field separation into primary and secondary fields. Due to limited memory, as well as performance concerns, sectioning is introduced for splitting large surveys into smaller sections. Sectioning is only done when calculating the 2D forward and derivatives, and it is done with a sufficient overlap, such that vital 2D information is preserved. The algorithm uses a hybrid scheme which i) starts with 1D forward and inverse calculations, ii) then switches to 2D forward calculations and 1D derivatives, and iii) finally ends with full 2D calculations. The result of this is a code which produces results like a 2D code, but with a substantially shorter computational time.

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
Pages1-5
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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