2-D Resitivity and Induced Polarization Smooth Inversion
Support for Wenner, pole-dipole, dipole- dipole, pole-pole and
Direct Support for instrument file formats including the Syscal series
Support for expanding arrays by increasing a spacings
256 Color support for screen graphics
256 Color support for most common commercial hardcopy devices
User defined color scale setup and contour settings
Invert both Resistivity and IP data
Show inversion progress in text or graphics mode
Control number of iterations by decrease in error value or absolute
Four methods of damping determination
Choose between Ridge Regression or Occam's inversion method
Control Partial Derivative calculations by using approximated or full
Options to perform Quasi-Newton updates on all or selected iterations
RESIX 2DI is an interactive, graphically oriented, inversion program
designed for the interpretation of resistivity and IP data. RESIX 2DI
performs a 2-D cell based inversion, which is constrained by the
resistivity pseudosection. The software supports Wenner, pole-dipole,
pole-pole, dipole-dipole, and Schlumberger arrays. The only limits to
the number of sources and receiver electrodes used are the speed of your
computer and the size of its memory.
RESIX 2DI calculates the forward response of a homogeneous half-space
using a finite element routine. It then performs a rapid least squares
inversion of apparent resistivity using non-linear optimization
The regularization methods used to stabilize the inversions are of two
types: the first is based on Occam's Principle, which optimizes
smoothness in the model; the other is based on a ridge regression
algorithm, which minimizes the least squares error.
There is also an exact inversion method available which calculates the
partial derivatives of all the data and then performs the inversion. The
resulting smooth model may then be saved in a binary random access disk
file for later retrieval and presentation.
Topography corrections are done by calculating the resistivity response
of a 1 ohm-meter homogenous earth containing the topography. These
computed values may then be factored into the synthetic calculations
(leaving the data untouched), or they may be divided directly into the
The smooth model may in turn be used as a template for constructing
polygonal starting models while in the RESIX IP2DI Resistivity and
Induced Polarization Data Interpretation Software on page ???
RESIX 2DI v1 software and manual.
|Resix 2DI v1