The application of geoeye-1 stereo pair images to regional gravimetric terrain corrections

The accuracy of the gravity corrections is limited by the ability to survey the near-station topography. By now, regional gravity terrain corrections still rely on traditional high field survey, which is inefficient and expensive. In this paper, we explored an alternative way by using high resolution satellite stereo-photogrammetry for gravimetric terrain corrections. In the proposed approach, geoeye-1 stereo pair images with rational function model were used to obtain high precision and density digital terrain models near gravimetric points. Meanwhile, a differential equation was put forwards to compute the gravity terrain effect. Compared with field gravity surveying data, results illustrated that our model is effective for middle zone terrain correction, and has a good prospect for inner zone terrain correction.