EMIGMA Premium Series

EMIGMA for Airborne FEM + TEM

Airborne FEM + TEM package is available as an add-on to other EMIGMA Complete packages or as a standalone product. The combination of airborne FEM+TEM with the airborne magnetics license is a popular choice.

In the airborne FEM method, the transmitter and receiver coils are generally housed in a single case and are towed by a helicopter, whereas in airborne TEM transmitters are attached to the fixed wings, nose and tail of an aircraft and a 3-component receiver is housed in a bird. EMIGMA also provides configurations of helicopter TEM systems for both central loop and slingram syles.

Airborne FEM and TEM offer the advantage of collecting large amounts of data over a relatively short period of time. Being not limited by the survey size, EMIGMA allows for rapid airborne FEM and TEM modeling within a full contrast range from massively conducting targets in a resistive environment to resistive targets inside a conducting earth, for any number of plate, prism and polyhedra anomalies. EMIGMA is an excellent tool for survey design as well as for interpreting your data.

Unlimited Survey Size!

Data Import

• Calibrated FEM data imports from either ASCII files or manufacturers format (Fugro DIGHEM, SIAL and RESOLVE)
• Airborne TEM (VTEM, Fugro Geotem/Megatem)

Data Processing and Correction

Data Display and Analyses

• Display of data over flight altitude variations, GPS positions
• Display of Apparent Resistivity as a surface or spatial contour
• PEXShow tool - 2D representation of geoelectric sections
• Display of 3D models sliced and diced in the 3D Visualizer
• Grids: Natural Neighbor, Delauney Triangulation, Shepard, Minimum Curvature and Thin-Plate-Splines
• Contours: 2D and 3D surfaces
• Time decay contours (TEM)
• Line plots
• Residual plots
• Overburden model removal processing

For more detailed data display capabilities, see EMIGMA Complete

3D Modeling

• Fast and accurate 3D simulations: model suite generation and batch mode
• Prisms, thin-sheet plates, polyhedra and sphere targets
• Multiple body interactions
• Modeling of topography effects
• Modeling of magnetic effects in EM data
• Accounting for variations in resistivity, susceptibility and Cole-Cole parameters
• Ability to handle full contrast between host and bodies
• Incorporation of altitude information
• Interactive 3D model building tool

1D Inversion

• Joint Susceptibility/Apparent Resistivity Inversion for FEM - 3D Resistivity volumes including susceptibility effects
• Smooth Occam and non-smooth Marquardt algorithms - Two-layer inversion for mapping overburden or depth to basement and Multi-layer inversion for up to 19 layers of non-uniform thickness
• 1D inversion of fixed-wing and helicopter TEM data
• Suite of minimization techniques
• Incorporation of GPS_Z information

TEM Pseudo Inversion

• Display of time decays (layered or 3D) for user selected time windows

EIKMAP

• Apparent Resistivity Tool - a half-space mapping technique for generating apparent resistivities as a function of frequency
• Sengpiel Depth-Sections - a resistivity pseudosection technique for generating resistivities as a function of pseudo-depths
• CDI for TEM

Export

• Images exported to postscript files or raster formats
• Data export to XYZ ASCII delete (measured, modeled , inverted)
• Inversions exportable to ASCII file
• Grids to XYZ ASCII or Geosoft/Surfer formats
• Data export to Geosoft *.GBN format
• Models exported to EMIGMA or GeoTutor formats