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W
=
, pass from the Ith quadrant to the IVth quadrant and merge with
the longitudinal impedance phases,
arg
W
zy
+
π
.
In closing consider the field and tipper profiles.
Figure 7.24 presents the electric and magnetic profiles in a model with the resis-
tive central segment. The fields
E
x
,
H
y
(TE-mode) and
E
y
(TM-mode) are nor-
malized to the normal fields
E
N
x
E
N
y
H
N
y
. The inductive TE-anomalies envelope
the central segment and rather quickly attenuate with distance. At the distances
,
,
Fig. 7.24
Electromagnetic field profiles in the three-segment model with resistive central segment
shown in Fig. 7.16;
y
-distance to the centre of the model. Model parameters:
1
=
1Ohm
·
m
,
h
1
=
,
1
=
1km
100 Ohm
·
m
,v
=
10 km
,
=
10000 Ohm
·
m
,
h
2
=
99 km
,
=
0 Profile param-
2
3
eter: period
T
= 1-10000 s
