These ExternalAttrib scripts estimate AVO intercept and gradient based on Shuey's 2 term approximation to the Zoeppritz equation.

Intercept and Gradient from 4 Angle Stacks

Script: Miscellaneous/

Takes as input 4 angle stacks and the corresponding angles and fits a least squares line to the amplitude and $ sin^2(angle) $ at each sample point. Ouput includes the intercept, gradient and the correlation coefficient of the line fit.

Input Parameters input parameters input parameters

For each input volume the corresponding incident angle must be provided.