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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
 
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