Geoid determination in mountainous coastal regions from altimetry and gravimetry
Abstract
The paper presents numerical results for the solution of the altimetry-gravimetry boundary value problem along a mountainous coastline. The solution uses spherical Shanon wavelets based on the Abel-Poisson kernel and spherical pseudo-diffferential operators. The orthogonality of Shanon wavelets can be used for the numerical solution, overcoming some technical problems with generally non-orthogonal spherical wavelets. A numerical experiment has been conducted in the western coast of Canada and the US and the results have been compared with the geoid heights computed from gravity anomalies by applying 1D FFT spherical Stokes convolution with 50 km integration radius and with the most recent Canadian geoid (CGG2000). Significant effects of compatibility are expected in this mountainous coastal region. The smoothness effects on the solution are discussed and conclusions are drawn about the quality of the numerical solution obtained.
- Publication:
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AGU Spring Meeting Abstracts
- Pub Date:
- May 2004
- Bibcode:
- 2004AGUSM.G34A..05G
- Keywords:
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- 1214 Geopotential theory and determination