The measurement of gradients of the earth's magnetic field from an airborne platform has been advocated for many years. In 1954 Wickerham proposed the use of what is essentially a gradient along the flight direction (longitudinal gradient). Hood's 1965 suggestion was to measure the vertical gradient using a total-field magnetometer mounted in a tail stinger and a second magnetometer in a towed bird below the tail stinger. In fact, the system finally built by Hood's group at the Geological Survey of Canada used two tail stingers separated by 2 m. The advantages of this type of total-field vertical gradiometry were...

First Page Preview

First page PDF preview
You do not currently have access to this article.