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(g)
|
b
x
|
0.08
(g)
/
Z
0
|
|E
y
0.04
(g)
|b
z
|
0.00
0
(g)
Phase b
x
−
100
(g)
Phase E
y
−200
(g)
Phase b
z
−300
−
300
−
200
−
100
0
100
200
300
Distance, km
Fig. 11.5.
The computed meridional distribution of amplitudes (upper panel) and
phases (bottom panel) of electric (
E
(
g
y
/Z
0
−
long dashed line) and magnetic compo-
nents (
b
(
g
x
- solid line,
b
(
g
z
- short dashed line). Geomagnetic latitude is
Φ
=60
◦
,
inclination is
I
=74
◦
. Distance = 0 is the base of the FLR-line. A four-layered
geoelectrical cross-section with
ρ
1
=30Ohm
·
m
,h
1
=3km;
ρ
2
=3
×
10
3
Ohm
·
m
,
h
2
=50km;
ρ
3
=3
×
10
2
Ohm
·
m
,h
3
= 50 km and the perfect conductive lower
half-space.
Σ
P
=13Ohm
−
1
,Σ
H
=14Ohm
−
1
.
The electric and magnetic compo-
nents are normalized with the incident Alfven wave
coordinate dependencies of the electric
E
(
g
y
(
x
) and magnetic
b
(
g
x
(
x
) compo-
nents and their ratio as functions of distance from the FLR-shell
Z
g
(
x
)=
E
(
g
y
(
x
)
.
(11.25)
b
(
g
x
(
x
)
Figure 11.5 shows the dependencies of amplitudes and phases on distance from
the base of the FLR-shell for field components
b
(
g
x
,E
(
g
y
/Z
0
and
b
(
g
z
.
The computations revealed a number of important features of a ground-
based field:
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