Optimization in gravimetric terrain corrections

Terrain corrections for gravimetric measurements require topographical data of appropriate accuracy and density. The situation is clearly dependent on the ruggedness of the topography and the accuracy specifications for the terrain corrections. From the optimization point of view, this computational problem has been investigated and computer software developed for the near, intermediate, and distant zones surrounding the gravity stations. Test results indicate that the general accuracy objective of 1.0–1.5 mGal (10–15 μm s −2 ) for the gravimetric terrain corrections is easily achievable in practice with appropriate topographical data. For geophysical applications, higher accuracies are certainly achievable with the method, even in rugged areas.