IA003 RECENT CONTRIBUTIONS OF BGR TO HIGH RESOLUTION HELICOPTER GEOPHYSICS AUTHORS Abstract 1 The Federal Institute for Geosciences and Natural Resources of Germany (BGR) optimised its helicopter-borne geophysical system to conduct high resolution airborne surveys using electromagnetics (EM) magnetics and gamma-ray spectrometry. The modifications comprise not only the measuring system particularly the five-frequency EM system but also the processing and interpretation software. Using the new developed line based algorithms for the interpretation of magnetic and EM data it is now possible to detect even small waste occurrences e.g. metallic objects at least as large as a steel drum as well


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