Effect of filtering on drift and anisotropy parameters determined by full correlation analysis

Abstract

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 velocity V c is shown with increasing filtering, unless V >> V c, when V c increases with filtering. The ratio V,/V however shows an increase as the decrease in the true drift velocity V is steeper than V~. 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.