3.3.2. Predicted Data File

predicted data files output from e3d.exe contain the locations and predicted data. The order of the data points is in the same order as the survey and locations file. Each block, separated by a blank line, are the data for a particular transmitter and frequency. Thus predicted data files take the format:

Data Array 1

Data Array 2

\(\;\;\;\;\;\;\;\; \vdots\)

Data Array N

3.3.2.1. Data Array

Important

The data are represented in a left-handed coordinate system where X is Easting, Y is Northing and Z is +ve downward.

For each transmitter at each frequency, a set of field observations are made for a set of receivers. These field observations include real and imaginary components of the electric and magnetic fields. The rows of the data array are formatted as follows:

\[| \; x \; | \; y \; | \; z \; | \;\;\; E_x \; data \;\;\; | \;\;\; E_y \; data \;\;\; | \;\;\; E_z \; data \;\;\; | \;\;\; H_x \; data \;\;\; | \;\;\; H_y \; data \;\;\; | \;\;\; H_z \; data \;\;\; |\]

such that \(E_x \; data\) is comprised of 2 columns:

\[| \; E_x^\prime \; | \; E_x^{\prime \prime} \; |\]

where

• \(E_x^\prime\) is the real component of the electric field along the Easting direction

• \(E_x^{\prime\prime}\) is the imaginary component of the electric field along the Easting direction

This is done likewise for \(E_y\), \(E_z\), \(H_x\), \(E_y\), \(H_z\).