Specifications
University of Pretoria etd – Combrinck, M (2006)
y = 0.0127x - 5E-07
0
5
10
15
20
25
30
35
0 200 400 600 800 1000 1200
Depth [m]
Conductance [S]
Equivalent Current Filament
Electric Field Maxima
Cumulative conductance S-Layer
Corrected S layer
Linear (Cumulative conductance S-Layer)
Figure 4-18: Cumulative conductance curves for late time half space and S-layer approximations.
Though the ‘smoke ring’ idea was developed by representing the half space response by a
single current filament, expanding outward and downward, the S-layer transform likewise
uses a single filament to present the S-layer behaviour. It was consequently assumed that
the factor that relates the filament depth to the electrical field maxima in the half space
behaviour will be the same in the S-layer approach. This factor of 0.7807 was then used to
calculate a correction factor for S, given below.
.54600
offactortion multiplica correctiondepthatoleading
43.1
7807.0
.
S
d
FATOR
FACTOR
=
=
1.5.2 Correction factor: Application to synthetic data
The three possibilities for a correction factor are compared on five synthetic data sets in
this section. All synthetic data were generated with MARCO software assuming the
following system parameters:
Tx loop: 50m X 50m
Tx current: 5 A
Rx loop: 1 m^2
Time channels in seconds:
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