Unformatted text preview: • Vertical gradient is a maximum of about 0.03nT/m at poles and 0.01 nT/m at equator. • Elevation correction • Generally not required for ground surveys • Only in airborne when large elevation changes experienced • Terrain correction • Only comes into play near the base of steep slopes of high k material Elevation and Terrain Corrections...
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- Spring '09
- Geodesy, 60 degrees, Normal Field Correction