Determination of the Gravity Disturbance on the Earth's Topographic Surface from Airborne Gravity Gradient Data
Abstract
The test flight of the gravity gradiometer survey system was taken in a flat area. In the future the test will be carried out in the rough mountain area and the topographic effect has to be taken into account. In this report the analytical downward continuation method was used to determine the gravity disturbance on the earth's topographic surface. The downward continuation is an improperly posed problem, especially in the processing of the aerial gradient data. In order to overcome this difficulty, three methods were discussed and were used for a simulated computation. The numerical computation shows that the gravity disturbance can be determined on the earth's surface with satisfied accuracy. With 1 Eotvos measure error in the gravity gradient data, the gravity disturbance was determined on the earth's surface with the accuracy of 1 mgal. The gravity disturbance was recovered with the accuracy of 3 mgal when the measure error of the gravity gradient was 5 Eotvos. Keywords: Gravity; Gradiometer; Downward Continuation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1988
- Accession Number
- ADA214596
Entities
People
- Yan M. Wang
Organizations
- Ohio State University