GMINV: A computer program for gravity or magnetic data inversion

Abstract

A computer program for inversion of potential field data using the damped approximate technique is presented. The underlying principles for the optimized damped approximate inversion scheme are discussed. The damping factors and threshold level are selected optimally so that maximum information contained in the data is retained. The facility for constraining or allowing the parameters to range freely is incorporated in GMINV. The analysis of the resolution matrix, eigenvalues, damping factors, V-matrix, and correlation matrix simultaneously facilitates the study of degree of uniqueness of the retrieved parameters and their interdependence. Synthetic gravity data generated across a basinal structure and two field examples are used to highlight the efficacy of the program.