ERTLab Solver is the resistivity and IP inversion module that offers full three-dimensional topographical modeling and inversion. Its numerical core based on tetrahedral FEM allows the user to input complex topographic information and to invert data sets collected using surface, borehole and surface-to-hole array configurations.

Inversion

• Smoothness constrained least-squared inversion
• Robust inversion (data variance iterative reweighting)
• Controllable parameters
• Forward solver accuracy
• Boundary conditions (Neumann, Dirichlet, mixed)
• Regularization factors
• Roughness functions weights
• Noise estimates

Survey Design

• Resistivity/IP 3D forward modelling from generic sequences
• Analysis and display of sensitivity functions
• Interactive definition of the starting model

Mesh generation

• 3D complex topography
• User defined mesh
• Mesh and model import/export tools

Data quality control

• Pseudo-plots view
• Graphic/numerical processing of bad data-points
• Reciprocal check

ERTLab Sequencer is a practical tool for the creation of 2D and 3D arrays/schedules of electrical resistivity measurements.

Cables/electrodes definition

• User-friendly interface to insert electrodes and cables
• Practical 3D view managing of the inserted objects
• Mouse controlled selection of the electrodes to be skipped or to be used in roll along mode

Sequence generation

• Sequence generator for 2D and 3D surface, borehole or surface-to-hole surveys (Linear Dipole-Dipole, Parallel Dipole-Dipole, Pole-Dipole, Pole-Pole, Wenner, Wenner-Schlumberger)
• Special envinroment for Multi-Borehole sequence creation
• Option to create mixed arrays by appending multiple sequences
• Multi-channel receiver optimization
• Geometric factor constraining
• Reciprocal quadrupoles generation
• Different Import/Export formats (ElectreII, ErtLab Solver, text)
• Conventional pseudo-plots for displaying measurement coverage

ERTLab Viewer is a powerful graphical envinroment to represent resistivity/IP models. Visualize inverse and forward models in a variety of ways, including sections, volumes and isosurfaces. These may be spun and re-oriented in real-time.

Display sections

• Display sections in xy, yz, xz plane
• Display sections in any generic direction of the space, by defining a point and a normal to the plane direction
• Three different modes to represent sections: contours (automatic or user-defined), cell scalars and node scalars

Volumes and isosurface extraction

• Plumes extraction (volumes)
• Isosurface definition

Color mapping

• Resistivity/conductivity switch
• Rainbow or red-blue, linear or logarithmic, regular or inverted colorbars

Advanced visualization properties

• Transparency, clipping on/off option
• Ortographic/perspective view
• Axes properties definition, labels editing

Export

• Export in bitmap format
• Load/save script file with session settings