“The best resistivity inversion software is the one you trust without second-guessing. For three decades, that trust has been placed in Interpex — and v350 proves why.”
The software implements two primary inversion algorithms:
Models horizontal coplanar, vertical coplanar, and vertical coaxial loop configurations. It processes in-phase and quadrature responses as percentages or parts-per-million (ppm) of the primary magnetic field.
The program features two core approaches to data evaluation. Users can estimate a or deploy a smooth model (such as Occam's inversion) to visualize continuous transitions in subsurface properties. 3. Parameter Pinning (Fix Flags)
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For marine EM work, a specialized variant handles inline E, crossline H, broadside E, joint inline‑E/crossline‑H soundings, step‑on/step‑off or impulse current sources, and even anisotropic resistivity models.
The software excels at converting apparent resistivity curves (measured in ohm-m) into a layered earth model—typically 2 to 7 layers—showing true resistivity and thickness for each layer. This output is essential for:
Here is an interesting deep-dive into the software that has been the "workhorse" of the geophysical industry for decades.
Fig. 1: The typical workflow for interpreting VES data using Interpex IX1D v3.50. “The best resistivity inversion software is the one
: Supports Robust inversion (typically 1 to 10 layers) and Smooth inversion (Occam’s method, 10 to 100 layers).
Interpex IX1D v350: A Comprehensive Guide to 1D Geophysical Inversion Software
Determining overburden thickness and bedrock depth.
Keywords integrated naturally: Interpex IX1D v350, 1D resistivity inversion, VES interpretation, geophysical software, layered earth modeling, DC sounding, Schlumberger array, apparent resistivity curve, Levenberg-Marquardt inversion. The program features two core approaches to data evaluation
Instructions on importing data from a specific instrument
If you open IX1D v3 today, you won't find the sleek, app-like interface of 2024. You will find a functional, menu-driven, grid-based workspace.
The core value of IX1D v3.50 lies in its dual approach to subsurface modeling, combining predictive forward calculations with data-driven inversions.
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