Specifications

University of Pretoria etd – Combrinck, M (2006)
0
0.5
1
1.5
2
2.5
3
3.5
ES
US
ES
US
ES
US
US, smoothed
ES, smoothed
US, smoothed
ES, smoothed
US, smoothed
ES, smoothed
Average percentage error
Lagrange Three Point
Cubic Spline
Inverse of Integration
Figure 4-6: A summary (in ascending order) of the average error over twenty data points for
each of the alternatives in Figure 4.5. (ES: equal spacing, US: unequal spacing)
4.4.3.2 S-layer differential transform applied to forward modelled data
A set of data was calculated for a three-layer earth using MARCO software developed by
AMIRA. The model and data are shown in Figure 4-7.
1.00E-10
1.00E-09
1.00E-08
1.00E-07
1.00E-06
1.00E-05
0.00001 0.0001 0.001 0.01
Time [s]
dB/dt [T/s]
0.02 S/m
0.02 S/m
0.2 S/m
15 0 m
15 m
Ea rt h re s is tivit y mo de l
Figure 4-7: Synthetic data and model for three-layer earth.
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