Resix 2DI
2D Resitivity and Induced Polarization Smooth Inversion
Features

Support for Wenner, poledipole, dipole dipole, polepole and
Schlumberger arrays

Direct Support for instrument file formats including the Syscal series
of receivers.

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

Topography corrections

Inversion Options

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
error value

Four methods of damping determination

Choose between Ridge Regression or Occam's inversion method

Control Partial Derivative calculations by using approximated or full
solutions

Options to perform QuasiNewton updates on all or selected iterations
during inversion
General
RESIX 2DI is an interactive, graphically oriented, inversion program
designed for the interpretation of resistivity and IP data. RESIX 2DI
performs a 2D cell based inversion, which is constrained by the
resistivity pseudosection. The software supports Wenner, poledipole,
polepole, dipoledipole, 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 halfspace
using a finite element routine. It then performs a rapid least squares
inversion of apparent resistivity using nonlinear optimization
techniques.
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 ohmmeter 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
field data.
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 ???
Standard Components
RESIX 2DI v1 software and manual.
Ordering Information
Description


Order number

Resix 2DI v1 

4601000050 