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Fig. 3.9
The Groom-Bailey decomposition in the superimposition model shown in Fig. 1.11;
-
⊥
- longitudinal and transverse phases of the two-dimensional regional
impedance; vertical bars characterize the data scattering caused by measurement noise, FA - favor-
able area, 1-data for the noise-free impedance, 2-true data
and
regional strike,
3.3 The Zhang-Roberts-Pedersen Method
Next we examine a special case that the (2D+2D)-superimposition model contains
a two-dimensional local near-surface structure L over a two-dimensional regional
structure R. The case has been investigated by Zhang et al. in their pioneering work
(1987).
Let
L
be the angles of regional and local strike respectively (Fig. 3.11).
In the regional coordinate system the
x,y
-axes are along and across the strike of the
regional structure. In that event
R
and
0
R
1
[
Z
R
]
=
,
R
2
−
0
