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H o y ( y o )
y
1
π
W zy ( y ) H o y ( y )
+
dy o =−
W zy ( y )
.
(5
.
80)
y o
−∞
In the closing stage of the synthesis, it is a simple matter to apply (5.69) and
translate the anomalous magnetic field into the anomalous electric field.
Summing up, we arrive at a conclusion that the Wiese-Parkinson matrices given
at all points of the Earth's surface carry complete information on magnetotelluric
anomalies. Using this information with a knowledge of the normal field and the
normal impedance, we can reconstruct the magnetotelluric field and the impedances.
Thus, considering a two-dimensional model and taking into account (5.58), we have
(Vanyan et al.,1997):
y
E o x
H o z ( y o ) dy o ,
E o x ( y )
=
i
o
(5
.
81)
−∞
whence
y
E o x ( y )
H o y ( y ) =
1
H o y ( y )
H o z ( y o ) dy o } .
Z ( y )
=
1 {
Z N
i
o
(5
.
82)
+
−∞
5.2.4 Synthesis of the Magnetic Field from the Generalized
Impedance Tensors
Let the normal field in the generalized impedance model contain three independent
modes: two plane-wave modes with polarization in the orthogonal directions and
the source-effect mode with vertical magnetic component. In that model we have
the generalized impedance tensor
Z xx
Z xy
Z xz
[ Z ]
=
,
Z yx
Z yy
Z yz
which
transforms
the
magnetic
field
H ( H x ,
H y ,
H z )
into
the
electric
field
E ( E x ,
E y ):
Z xx H x +
Z xy H y +
Z xz H z ,
E x =
Z yx H x +
Z yy H y +
Z yz H z .
E y =
 
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