Interactive inversion of dipole loop-loop electromagnetic data for layered earth models using numerical integration and complex image theory (version 1.0)

This report is provided as a reference guide to define the basic graphical user interface (GUI) responses needed to perform interactive forward or inverse modeling of dipole loop-loop electromagnetic (EM) data using an IBM compatible personal computer (PC). The underlying model used is a one-dimensional (1-D) horizontal layered earth with parameters being the layer resistivities and thicknesses below the earth's surface. Mathematical details of the layered earth modeling are summarized below and in Appendix 1 that describes two general methods: numerical integration and complex image theory to compute forward or inverse sounding curves in the frequency-domain. Any combination of 5-different dipole loop-loop geometries can be selected in the modeling. The program in this report is named INVDP (for INVersion of DiPole data).