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Fig. 3.13
Phase-tensor
ellipses: 3D -
three-dimensional regional
background, 2D -
two-dimensional regional
background
x
Ψ
1
3D
α
1
β
α
y
Ψ
2
x
2D
Ψ
1
α
1
=
α
y
Ψ
2
of
ske
w
CBB
from zero identifies the three-dimensional asymmetry of the regional
background.
Note that the Caldwell-Bibby-Brown
ske
w
CBB
given by (3.79) is connected with
the Bahr
ske
w
B
given by (1.61):
1
2
arctan(
Mske
B
)
ske
w
CBB
=
w
,
(3
.
80)
where
M
is a scale factor
Z
xy
−
Z
yx
2
=
Re
Z
xy
Re
Z
yx
)
.
M
(
xx
+
yy
)(Re
Z
xx
Re
Z
yy
−