Abstract
In most positioning, mapping and exploration applications, conventional spirit levelling is being replaced by modern methods such as GPS and use of geoid information. The objective of this paper is to compute a precise geoid/quasigeoid model for Libya based on high resolution gravity and terrain data in combination with a global geopotential model.
This paper gives overview on the work connected with the computation of the first gravimetric geoid for the area of Libya. The data used are; (a) 5’× 5’ gridded value of Bouguer anomalies (onshore) and free-air anomalies (offshore) based on the African Gravity Project, and released for geoid computation by Geophysical Exploration Technology University of Leeds (GETECH), (b) global (5’×5’) Terrain Base global digital terrain model (c) the OSU91A and EGM96 geopotential models. Two geoid/quasigeoid models have been computed. First model is referred to OSU91A and second one to EGM96 global model.
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References
Benaim E.H., Takhchi M., Tikdirnine L., Sevilla M.J., 1997, The first northern Moroccan gravimetric geoid, paper presented at XXII General Assembly of European Geophysical Society, Vienna, Austria, 21–25 April 1997
Bouziane M., 1996, The New Algerian Quasi-Geoid 96 Computed Using Spherical FFT, International Geoid Service, Bulletin N. 5, pp.40–56, Milano, Italy
Forsberg R., Sideris M.G.,1993, Geoid computations by the multi-band spherical FFT approach, Manuscripta Geodaetica, 18, pp.82–90
Hanafy M.S.A, El Tokhey M.E.A., 1995, Towards a High Precision Geoid for Egypt, Gravity and Geoid, Symposium No. 113, Springer, pp.597–606
Row L.W., Hastings D.A., Dunbar P.K., 1995, Terrain Base, Worldwilde Digital Terrain Data, CD.-ROM Release 1.0, National Oceanic and Atmospheric Administration, Boulder, Colorado
Schwarz K.P., Sideris M.G., Forsberg R., 1987, Orthometric Heights Without Levelling, Journal of Surveying Engineering, vol. 113, No 1
Wichiencharoen C., 1982, The Indirect Effects on the Computation of Geoid Undulations, The Ohio State University, Department of Geodetic Science and Surveying, Report No. 336
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© 1998 Springer-Verlag Berlin Heidelberg
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Łyszkowicz, A., Wahiba, A.A. (1998). The Gravimetric Geoid for Libya. In: Forsberg, R., Feissel, M., Dietrich, R. (eds) Geodesy on the Move. International Association of Geodesy Symposia, vol 119. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72245-5_40
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DOI: https://doi.org/10.1007/978-3-642-72245-5_40
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