Publication: A high-resolution gravimetric geoid in the Strait of Gibraltar
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1997-06
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Springer
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A high-resolution gravimetric geoid model in the Strait of Gibraltar is presented. The computations are based in a data set consisting of 104890 free-air gravity anomalies covering the area (33 < phi < 39, -10.5 < lambda < 5.5). the OSU91A geopotential model and a Digital Terrain Model. The remove-restore technique, the Helmert second condensation reduction and the Stokes formula are applied. The computations are made with the spherical 1 D FFT.Discrete spectra of the kernel function are used. In order to avoid circular convolution effects. 100% zero padding has been appended arounded the signal matrix. The result is a 256 x 512 grid referred to the GRS80 system. Comparison with previous geoids in the same area shows an improvement in precision and reliability. The computed geoid is compared with geoid undulations obtained by GPS Levelling, and a precision of 1.0 ppm obtained.
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Balmino G, Lamy D, Sarrailh M, Toustou D, Vale s N (1989) Computation of a gravimetric geoid over the Strait of Gibraltar. Worksh Geod in the Strait of Gibraltar. Madrid, 8±10 March. SCEG (ed) pp 28
Benaim El Hassan (1995) Strategies de calcul d'un geoide gravimetrique sur le detroit de Gibraltar. Institut Agronomique et Veterinaira Hassan II, Rabat
Denker H, Behrend D, Torge W (1994) European Gavimetric Geoid: Status report. In: SuÈ nkel H and Marson I (Eds) Gravity and Geoid, International Association of Geodesy Symposia, Vol. 113, Springer, Berlin Heidelberg New York, pp 423-437
Denker H, Behrend D, Torge W (1995) The European gravimetric quasigeoid EGG95. BGI Bull D'Inf 77 (Toulouse) IGeS Bull 4 (Milano), pp 3-11
Forsberg R (1984) A study of terrain reductions, density anomalies and geophysical inversion methods in gravity ®eld modelling. Rep 355 Dept Geod Sci Surv. Ohio State University, Columbus
Groten E, Roehrich S (1989) Accuracy estimates of geoid computation and related quantities for GPS-work across the Strait of Gibraltar. Worksh Geod in the Strait of Gibraltar. Madrid, 8-10 March. SCEG (ed) pp 36-45
Gurtner W (1989) The determination of a local geoid. Worksh Geod in the Strait of Gibraltar, Madrid, 8-10 March. SCEG (ed) pp 54-63
Haagmans RHN, de Min E, van Gelderen M (1993) Fast evaluation of convolution integrals on the sphere using 1D-FFT, and a comparison with existing methods for Stokes' integral. Manuscr Geod 18: 227-241
Heiskanen WA, Moritz H (1967) Physical Geodesy. W.H. Freeman, San Francisco
Milbert DG (1995) Improvement of a high-resolution geoid height model in the United States by GPS height on NAVD88 benchmarks. BGI Bull D'Inf 77 (Toulouse) IGeS Bull. 4 (Milano), pp 13-36
Moritz H (1980) Advanced Physical Geodesy. Herbert Wichmann, Karlsruhe.
Moritz H(1984) Geodetic Reference System 1980. Bull Geod 58: 388-398
Rapp RH, Wang YM, Pavlis NK (1991) The Ohio State 1991 Geopotential and Sea Surface Topography Harmonic Coefficient Models. Rep 410 Dept Geod Sci Surv. Ohio State University, Columbus
Sevilla MJ (1995) A new gravimetric geoid in the Iberian Peninsula. BGI Bull D'Inf 77 (Toulouse) IGeS Bull 4 (Milano), pp 163-180
Sevilla MJ, RodrÃguez-Velasco G (1994) Digital terrain model for Spain. In: Arabelos D and Tziavos N (Eds), Mare nostrum 4. Thessaloniki, pp 19-31
Sideris MG (1990) Rigorous gravimetric terrain modelling using Molodensky's operator. Manuscr Geod 15: 97-106
Sideris MG (1994) Geoid determination by FFT Techniques. Lecture Notes. International School for the determination and use of the Geoid. International Geoid Service, DIIAR, Milan
Sideris MG (1995) FFT geoid computations in Canada. BGI Bull D'Inf 77 (Toulouse) IGeS Bull 4 (Milano), pp 37-52
Sideris MG, She BB (1995) A new, high-resolution geoid for Canada and part of the U.S. by the 1D-FFT method. Bull Geod 69: 92-108
Tscherning CC (1989)Achievable accuracy for geoid height differences across the Strait of Gibraltar. Worksh Geod in the Strait of Gibraltar, Madrid, 8-10 March. SCEG (ed) pp 53
Tscherning CC (1991) A strategy for gross-error detection in satellite altimeter data applied in the Baltic-sea area for enhanced geoid and gravity determination. In: Rapp RH and Sanso F (eds), Determination of the geoid. Present and future, International Association of Geodesy Symposia, Vol. 106, Springer, Berlin Heidelberg New York, pp 95-107
Tscherning CC (1995) GEOCOL10 Program. Unix version 1995.03.06
Tscherning CC, Knudsen P, Forsberg R (1994) Description of the GRAVSOFT package. Technical report. Geophysical Institute, University of Copenhagen. Copenhagen
Tziavos IN (1996) Comparison of spectral techniques for geoid computations over large regions. J Geod 70: 357-373