
TY  - JOUR
A1  - n, G.A.Wilso 
A1  - Raiche, A.P. 
A1  - Sugeng, F. 
T1  - 2.5D inversion of airborne electromagnetic data
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 2006
VL  - 37
IS  - 4
SP  - 363
EP  - 371
KW  - 
UR  - https://doi.org/10.1071/EG06363 
N2  - 2.5D electromagnetic (EM) modelling computes the response of a 3D source from an arbitrary 2D geoelectrical model. As such, it is practical for airborne EM (AEM) data to be inverted using 2.5D modelling provided that the geoelectrical cross-section is relatively constant along a strike length that exceeds the AEM system footprint. The program ArjunAir is introduced for modelling and inversion based on a 2D finite-element method that enables the accurate simulation of 3D source excitation for full domain models inclusive of topography, non-conforming boundaries, and very high resistivity contrasts. Inversion is based on an iterative Gauss-Newton method that is solved using the damped eigenparameter algorithm. Examples are presented for synthetic and practical frequency and time-domain AEM surveys for which inversion run-times are on the order of hours. 
ER  -

