Geoscience Reference
In-Depth Information
True position of the source
Two sources localisation problem
Measured self-potential
Initial inverse solution
−50
0.35
−100
−100
0.30
−150
−150
0.25
−200
−200
0.20
−250
−250
0.15
−300
−300
−350
0.10
−350
Observed voltage
Observed voltage + noise
Predicted data
−400
−400
0.05
−450
−450
0
−500
−500
-0.05
−550
−550
100
150
200
250
300
350
400
450
500
6.9
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
X
(m)
Self-potential (
μ
V)
(a)
(b)
Ninth iteration (using compactness)
Measured self-potential
−50
25
−100
−100
True current source 800 μA/m 3
−150
−150
20
−200
−200
−250
−250
15
−300
−300
−350
10
−350
Observed voltage
Observed voltage+noise
Predicted data
−400
−400
5
−450
−450
True current source 800 μA/m 3
−500
−500
0
−550
−550
100
150
200
250
300
350
400
450
500
6.9
7
7.1
7.2
7.3
7.4
7.5
7.6
7.7
X
(m)
Self-potential (μV)
(c) (d)
Figure 4.20 Test of the electrical source localization for two sources localized in an inhomogeneous medium. The sources are
analyzed in terms of volumetric source current distributions. a) Source current distribution at the first iteration. b) Comparison between
the true self-potential distribution and the one determined from the inverted source current density distribution. c) Source current
distribution using compactness. d) Comparison between the true self-potential distribution and the one determined from the inverted
source current density distribution using compactness. (See insert for color representation of the figure.)
Search WWH ::




Custom Search