
%0 Journal Article
%A Fullagar, Peter 
%A Reid, James 
%A Pears, Glenn 
%T Rapid 3D inversion of airborne TEM data from Forrestania, Western Australia
%J ASEG Extended Abstracts
%D 2015/03/12
%V 2015
%N 1
%P 1-4
%K 
%R https://doi.org/10.1071/ASEG2015AB120
%U https://www.publish.csiro.au/paper/ASEG2015AB120 
%X VPem3D performs 3D inversion on time-integrated (resistive limit) data. Conversion to resistive limits delivers a massive increase in speed since the TEM inverse problem reduces to a quasi-magnetic problem. The time evolution of the decay is lost during the conversion, but the information can be largely recovered by constructing a starting model from CDIs or 1D inversions. We have carried out preliminary inversion of VTEM dBz/dt data from the Forrestania EM test range. The inversion places a weak conductor at a depth and location consistent with the known target. Run time is a few minutes, a fraction of that required by a full 3D EM inversion. 
