is a leading 1D forward and inverse modeling software program designed for processing, interpreting, and displaying multidisciplinary geophysical sounding data. Developed by Interpex Limited based in Golden, Colorado, this specialized tool serves as an industry standard for geophysicists, hydrogeologists, and civil engineers. The software effectively translates field measurements into concrete, one-dimensional vertical profiles of the Earth's subsurface. Core Applications and Supported Methods
Note: If you are looking for the very latest updates, the software lineage has evolved into newer versions and suites, but v3 remains iconic in the industry for its stability and focused toolset.
Before performing inversion, the user can run a using any user‑specified 1‑D resistivity model. This capability is valuable for survey planning—for example, to determine the required AB/2 spacings for a VES survey or the appropriate listening times for a TDEM sounding. interpex ix1d v350
Detailed documentation and software updates are available on the Interpex IX1D product page .
| Feature | Interpex IX1D v350 | Modern 2D Inversion (e.g., Res2DInv) | | :--- | :--- | :--- | | | 1D (assumes lateral homogeneity) | 2D (accounts for lateral changes) | | Speed | Very fast (<2 sec per sounding) | Slow (minutes to hours per line) | | Data density required | Low (20-40 AB spacings) | High (100+ measurement points) | | User expertise | High (requires manual model input) | Moderate (automated meshing) | | Best use case | Deep sounding, regional characterization | Detailed profiles, complex geology | is a leading 1D forward and inverse modeling
The interactive, graphically oriented interface allows users to:
Click to let the Marquardt or Occam algorithm run. Within seconds, the software minimizes the Root Mean Square (RMS) error between the observed field data and the synthetic model. Aim for an RMS error below 5% for high-confidence geological interpretations. Core Applications Groundwater Exploration Core Applications and Supported Methods Note: If you
A key study published at compared three approaches for interpreting Schlumberger sounding data: master curves, IX1D, and the IPI2win program. The analysis showed that:
Subsurface chargeability variations can be inverted alongside resistivity. The program supports data measured in: (expressed in milliseconds / msec). Percent Frequency Effect (PFE). Phase Angle (expressed in milliradians / mrad). 3. Magnetotellurics (MT)
Understanding Interpex IX1D v3.50: The Standard for 1D Geophysical Interpretation