Master Tables for Electromagnetic Depth Sounding Interpretation (IFI Data Base Library)

In the fall of 1970, I went to Delft sounding - all with application of the digital University of Technology to do my doctoral linear filtering approach I developed in thesis under the supervision of Professor association with Professor Koefoed. Since Otto Koefoed at the geophysical laboratory. that time I have had it in mind to publish a He immediately directed my attention to the collection of multilayer earth numerical tables for compiling master curves to assist R&D project in electromagnetic depth sounding that was being pursued at the in interpreting electromagnetic geophysical laboratory. Aware of my admiration for his surveys. And this is how this volume has work, I immediately settled on pursuing evolved. research for my doctoral thesis in electro­ magnetics, which he gladly accepted. I was In this volume, after discussion of the indeed happy to work with him, as this had theory and interpretation of EM sounding, numerical tables of mutual coupling ratios been my long cherished ambition. for horizontal coplanar, perpendicular, and vertical coplanar loop configurations on the During the course of my graduate work at Delft, I realized that although EM surface of a four- and three-layer earth are sounding was gaining importance with the presented; the results can be readily ex­ rapid advancement of the EM theory for tended to other configurations. The numerical various applications including petroleum tables are extensive in that they have been and geothermal resources exploration, the computed over a wide range of parameters.