2. Type of array rotation to find the difference between anisotropy
and inhomogeneity influence.
For separation of
anisotropy and inhomogeneity influence we recommend non-symmetrical rotation
of arrays (for example, to rotate the D - array around the center of AB
(or MN), instead of spacing center) and analysis of azimuthal diagrams'
spectrum (Bolshakov et al., 1997). Even harmonics of spectrum are
the result of anisotropy influence, while odd harmonics are
the result of inhomogeneity influence. Dipole equatorial array is
not so convenient for asymmetrical rotation, at which one dipole is gone
along a circle’s arch, while other dipole turns around its center. For
such rotation it is better to use array with one current electrode, for
example T or Y-array or Arrow-type (AT)
array. Only one current electrode is used as rotation center, while
the second one is in infinity.
119899, Russia, Moscow, Moscow State University, Geological
Faculty, Department of Geophysics
V.A. Shevnin, I.N. Modin
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