Effect of filtering on drift and anisotropy parameters determined by full correlation analysis
The effect of low-pass filtering on the various drift and anisotropy parameters obtained by full correlation analysis of spaced receiver records is studied theoretically, assuming Gaussian correlation functions. A decrease in the characteristic velocityVcis shown with increasing filtering, unlessV ≫ Vv, whenVcincreases with filtering. The ratioVc/V however shows an increase as the decrease in the true drift velocityV is steeper thanVc. An increase in the size of the ground pattern with increasing filtering is also shown, while the axial ratio for anisotropic patterns shows a decrease. The results are verified with experimental data recorded earlier at Tiruchirapalli.
Volume 128 | Issue 8
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