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INTRODUCTION

Geophysical practice is filled with spheres and cones. Wave fronts are spheres. The Kirchhoff impulse response has a conical asymptote. Surface wave noises fill a conical surface. Likewise linear moveout in 3-D can be taken to be a conical surface. Because of the many applications that I found for a helix mapping of a cartesian space, I chose to examine spheres and cones. (To a small boy with a new hammer, everything looks like a nail.)


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Stanford Exploration Project
4/20/1999