Significant improvements have been made since the last presentation of the webapp on ExplorationGeophysics.Info pages. Now the shareware TDEM data inversion web application (ww.geomodel.info) has easy and comfy Eng-Rus interface, the input supports six different file formats (airborne and ground systems), sounding stations position can be represented on the scalable Google Map, data is showed in a sheet, TEM off-time decay chart and calculated apparent resistivity with time or depth.
The software can be used with data from WalkTEM, TerraTEM, ProTEM, Geotech airborne VTEM, TEM-FAST 48HPC, Tsikl and other TEM systems. A user can suggest any new data format and provide GEOMODEL developers with corresponded information.
The inversion process is interactive (forward modeling with thickness and/or resistivity changing) or iterative (automatic iterations to get correspondence between calculated and measured decay curve).
The inversion is based on 1D algorithm with support of CSIRO Division of Exploration and Mining and Australian Mineral Institute Research Association (AMIRA), P223F project.
The next procedures can be done with TDEM Geomodel webapp:
-Import-export TEM data and inversions from a large number of industrial formats, including USF;
-Viewing and analysis of transient field decay curves;
-Editing individual decays or tens of decays together in a fast and easy way;
-Runing 1D inversion and compiling resistivity sections;
-Saving results in ASCII format for further processing and presentation in third-party software (Surfer, Autocad, Geosoft Oasis Montaj, etc.).
-Saving inversion results as resistivity sections and maps in different image file formats.
The next example shows Geotech airborne VTEM data inversion (Alberta, Canada):
The development team welcomes user’s comments and suggestions.