Prediction of vertical deflections from high-degree spherical harmonic synthesis and residual terrain model data
نویسنده
چکیده
This study demonstrates that in mountainous areas the use of residual terrain model (RTM) data significantly improves the accuracy of vertical deflections obtained from high-degree spherical harmonic synthesis. The new Earth gravitational model EGM2008 is used to compute vertical deflections up to a spherical harmonic degree of 2160. RTM data can be constructed as difference between high-resolution SRTM (Shuttle Radar Topography Mission) elevation data and the terrain model DTM2006.0 (a spherical harmonic terrain model that complements EGM2008) providing the long-wavelength reference surface. Because these RTM elevations imply most of C. Hirt Western Australian Centre for Geodesy & The Institute for Geoscience Research Curtin University of Technology GPO Box U 1987 Perth, WA 6845, Australia E-mail: [email protected] E-mail: [email protected]
منابع مشابه
Efficient and accurate high-degree spherical harmonic synthesis of gravity field functionals at the Earth’s surface using the gradient approach
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