EGMlab, a scientific software for determining the gravity and gradient components from global geopotential models |
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| Authors: | R Kiamehr M Eshagh |
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| Institution: | (1) Department of Geodesy and Geomatics, Zanjan University, 45195-313 Zanjan, Iran;(2) Division of Geodesy, Royal Institute of Technology, SE10044 Stockholm, Sweden |
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| Abstract: | Nowadays, Global Geopotential Models (GGMs) are used as a routine stage in the procedures to compute a gravimetric geoid.
The GGMs based geoidal height also can be used for GPS/levelling and navigation purposes in developing countries which do
not have accurate gravimetric geoid models. Also, the GGM based gravity anomaly including the digital elevation model can
be used in evaluation and outlier detections schemes of the ground gravity anomaly data. Further, the deflection of vertical
and gravity gradients components from the GGMs can be used for different geodetic and geophysical interpretation purposes.
However, still a complete and user-friendly software package is not available for universities and geosciences communities.
In this article, first we review the procedure for determination of the basic gravity field and gradient components from the
GGMs, then general MATLAB based software is presented and applied as a sample case study for determination of gravity components
based on the most recent EIGEN-GL04C GRACE model in Sweden.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. |
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| Keywords: | Deflection of vertical components GPS Geoid Geoidal height Global geopotential model Gravity anomaly Gravity gradients Levelling Sweden |
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