Updated aeromagnetic compilation over Lake Superior

New aeromagnetic compilations have been produced for the Lake Superior region. The compilations combine previously published aeromagnetic survey data and compilations available from the Minnesota Geological Survey, Wisconsin Geological and Natural History Survey, Ontario Ministry of Energy, Northern Development and Mines, Natural Resources Canada, and U.S. Geological Survey (see MagneticSurveys.pdf). Two compilations were produced which differ in their theoretical observation height. The compilation at 150 m height maintains anomaly shape over geologic features on land; whereas the compilation at 300 m height better maintains anomaly shape for sources observed over Lake Superior and would be preferred for modeling anomaly sources beneath [...]