AGS Aarhus GeoSoftware The DC & IP module is designed for processing and inversion of ERT and induced polarization data. A unique feature is the ability to invert the full decays of the IP signal and not only the integral IP. The module implements extensive processing tools with pseudo sections showing DC or IP data, electrode positions with elevation, and full decay IP signals. The module is fully integrated with the GIS interface and automatic filters help to improve the data quality and speed up the processing. Inversion for both DC and IP can be done in 1D or 2D using smooth, sharp, blocky or layered models. The full IP decay data is modelled with a Cole-Cole, MPA, or CPA parametrization using the robust and fast AarhusInv inversion code. Modelling and presentation to the customer is done with the well known functions of the Aarhus Workbench so integrating with bore- holes, 3D viewer, creating reports etc. is easy and only a few clicks away. OVERVIEW
Transcript
AGS Aarhus GeoSoftware
The DC & IP module is designed for processing and inversion of ERT and induced polarization data. A unique feature is the ability to invert the full decays of the IP signal and not only the integral IP. The module implements extensive processing tools with pseudo sections showing DC or IP data, electrode positions with elevation, and full decay IP signals. The module is fully integrated with the GIS interface and automatic filters help to improve the data quality and speed up the processing.
Inversion for both DC and IP can be done in 1D or 2D using smooth, sharp, blocky or layered models. The full IP decay data is modelled with a Cole-Cole, MPA, or CPA parametrization using the robust and fast AarhusInv inversion code.
Modelling and presentation to the customer is done with the well known functions of the Aarhus Workbench so integrating with bore-holes, 3D viewer, creating reports etc. is easy and only a few clicks away.
OVERVIE
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Key features
• Data processing with integrated display of electrode positions, pseudo section and IP decays.• Automatic processing of IP decays.• Full current waveform and filters incorporated into the forward response when modelling IP data. • 1D/2D Cole-Cole, Maximum Phase Angle (MPA), Constant Phase Angle (CPA), and Integrated IP parametrization for inversion of IP data.• 1D/2D integrated IP inversion.• Support for DEM and topography files.• Smooth, sharp, blocky or layered inversion.• Re-process data directly from inversion results.• Integrated with the GIS interface.• Visualization in 3D viewer, pdf reports and profiles.• Support for .dat and extended .dat format.• Importers for ABEM Terrameter LS, Iris Syscal and Instrumentation GDD instruments.• Advanced automatic signal processing for ABEM Terrameter LS 2 data for greatly improved signal-to-noise ratio for IP data.• RES2DINV compatible.
Import
DC and IP data are imported using well-known data for-mats. In addition, the importer supports topography from an external topography grid or topography and electrode positions measured with GPS. Data information is listed during import to make sure everything is correctly read from the data and electrode coordinate files.
Processing
The processing tool is integrated with the GIS in-terface and location of selected data points or electrodes will be displayed on the GIS interface. The processing window shows the data points at each focus depth along with pseudo section, electrode posi-tions, DC and IP decay curves. For processing the user can disable electrodes and the corresponding data points, single data points, IP decay curves and vertical soundings.
Inversion
Inversion of the DC and IP data is performed with the AarhusInv inversion code. Full waveform IP data are inverted with Cole-Cole, Maximum Phase Angle, or con-stant phase parametrization. An integrated IP inversion option is also available. The model can be 1D or 2D with few-layered, many-layered and sharp models. Starting values for resistivity, thickness, constraints, chargeabil-ity, tau, and C can be individually changed for each layer, or optimal values can be chosen automatically. The in-version supports multi CPU cores with a high parallel efficiency.
