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Fig. 3.8
The Bahr decomposition in the superimposition model shown in Fig. 1.11;
y
-
deflection angles; vertical bars characterize the data scattering caused by measurement noise, FA -
favorable area
x
and
8
n
equations in 4
n
+3 unknowns (real and imaginary parts of longitudinal and trans-
verse regional impedances and frequency-independent
s
). Let
n
= 5. Thus,
we have 40 equations in 23 unknowns. Solving this overdetermined system of equa-
tions, we considerably smooth out the scatter in the local and regional parameters.
Another multi-frequency statistic has been suggested by Smith (1995). On this way
we examine a sequence of tentative regional strikes, stepping in small increment to
the strike angle, and select the best-fitting strike by weighted misfit minimization,
taking into account the correlated measurements errors.
R
,
t
,
