Abstract
An analytical inversion of the Hotine formula is presented and is evaluated by use of fast Fourier transform techniques. Three modifications of the analytical inversion of the Hotine formula are compared and tested using one-year average satellite altimetry data from the Exact Repeat Mission of GEOSAT. Estimated gravity information from these GEOSAT altimetry data using the analytical inversion of the Hotine formula is compared to marine gravity data from shipboard measurements in the Orphan Knoll area. The RMS and mean differences between satellite and shipboard gravity disturbances are about 8.0 and 2.9 mGal. Then, the observed geoidal undulations and gravity anomalies from satellite and marine measurements are subdivided into three major spectral bands: global, regional and local. In this paper, the local spectral bands of geoidal undulation and gravity are extracted from the measurements in order to model geophysical features such as knolls and seamounts. Forward geopotential modelling techniques are applied to model these features based on satellite altimetry and marine gravity data, and seismic and bathymetric data are used to constrain the solution. Two examples of using this forward modelling technique for the Orphan Knoll and the Shredder Seamount in the Labrador Sea are described and documented in detail.
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© 1995 Springer-Verlag Berlin Heidelberg
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Zhang, C., Sideris, M.G. (1995). Gravity Disturbances from GEOSAT Data and Forward Geopotential Models in the Labrador Sea. In: Sünkel, H., Marson, I. (eds) Gravity and Geoid. International Association of Geodesy Symposia, vol 113. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-79721-7_33
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DOI: https://doi.org/10.1007/978-3-642-79721-7_33
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