Occam Inversions

An Occam inversion generates a smooth model from CSAMT data—one different depth-conductivity value for each frequency (Constable and others, 1987). It is a fast and simple way to get a first look at the conductivity structure beneath a station, but requires a starting layer thickness and conductivity, and it cannot provide a least-squares error or other quantification of the fit. An Occam inversion of CSAMT data is shown in figure 3.

All Occam inversions were done for the TE = XY orientation. Station MSH-1001 is identical to station MSH-1002, and station MSH-1003 is identical to station MSH-1004 (two sets of repeated measurements).