Interpex Ltd. (Golden, Colorado) officially sunset active development of the v3.x series after 2015, focusing on their cross-platform IX1D v4 and IX2D v4. However, the remains widely circulated in academic and government circles. Why? Because it runs offline, requires no license server, and has a predictable, deterministic behavior—critical for regulatory work where reproducibility is key.
It parses both in-phase and quadrature components as a percentage or parts-per-million (ppm) of the primary magnetic field, translating them directly into apparent conductivity profiles measured in milliSiemens/meter ( 3. Magnetotellurics (MT) interpex ix1d v350
Look at the smooth curve to estimate the number of distinct layers (e.g., a dry topsoil, a wet sand aquifer, and a clay bedrock equals 3 layers). Interpex Ltd
is a professional 1‑dimensional (1‑D) inversion program developed by Interpex Limited , a specialized geophysical software company based in Golden, Colorado, USA. The software’s primary purpose is to determine a 1‑D layered‑earth model—that is, the true resistivities and thicknesses of subsurface layers—that best explains measurements obtained from various surface geophysical methods. Magnetotellurics (MT) Look at the smooth curve to
The delta between your field curve and the forward curve guides manual adjustments.
A major trap in 1D inversion is —the physical reality that different combinations of layer thicknesses and resistivities can produce identical sounding curves. IX1D v3.50 addresses this via its robust Equivalence Analysis feature. Understanding Equivalence