Improving the geoid accuracy by adapting the reference field |
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| Institution: | 1. Civil Engineering Department, Faculty of Engineering, Minia University, Minia 61111, Egypt;2. Institute of Theoretical Geodesy, Graz University of Technology, Steyrergasse 30, A-8010, Graz, Austria;1. INRA, UMR1213 Herbivores, F-63122 St-Genès-Champanelle, France;2. Clermont Université, VetAgro Sup, UMR Herbivores, BP 10448, F-63000 Clermont-Ferrand, France;3. Institut de la Nutrition, de l’Alimentation et des Technologies Agro-Alimentaires, INATAA, Université Frères Mentouri-Constantine, route de Ain El Bey, 25000 Constantine, Algeria;4. Département des Sciences de la Nature et de la Vie, Université Larbi Ben M’Hidi, Oum El Bouaghi, Algeria;1. KU Leuven, Department of Chemical Engineering, Process and Environmental Technology Lab, J. De Nayerlaan 5, 2860 Sint-Katelijne-Waver, Belgium;2. University of Oxford, Department of Engineering Science, Parks Road, Oxford OX1 3PJ, United Kingdom;1. Water and Society Program, College of San Luis C.A. (COLSAN), Parque Macul 155, Colinas del Parque, C.P 78294, San Luis Potosí, Mexico;2. Applied Geosciences Division, Potosin Institute of Scientific and Technological Research, C.A. (IPICYT), Camino a la Presa San José # 2055, Lomas 4a, Sección, C.P. 78216, San Luis Potosi, Mexico;3. Cátedras CONACYT, IPICYT, Applied Geosciences Division, Potosin Institute of Scientific and Technological Research, C.A (IPICYT), Camino a la Presa San José # 2055, Lomas 4a, Sección, C.P. 78216, San Luis Potosi, Mexico;4. Inter-American Institute of Technology and Water Sciences, Autonomous University of the State of Mexico, Carretera Toluca Atlacomulco Km 14.5, Unidad San Cayetano, Toluca, 50200, Mexico;1. Fayoum University - Faculty of Engineering - Civil Engineering Dept., Fayoum, Egypt.;2. Al-Baha University, Faculty of Engineering, Civil Engineering Dept., Al-Baha, Saudi Arabia;1. Department of Physics, Yeungnam University, Gyeongsan 38541, Republic of Korea;2. NUS Environmental Research Institute, National University of Singapore, #02-01, T-Lab Building, 5A Engineering Drive 1, Singapore 117411;3. Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur 208001, India;4. Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, Solan 173 234, India;5. Department of Environmental Science and Technology, Central University of Punjab, V.P.O. Ghudda, Bathinda, Punjab 151401, India;6. Instituto Tecnológico Vale, Rua Boaventura da Silva 955, Nazaré, 66055-090 Belém, Pará, Brazil;7. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China;8. University Institute of Biotechnology, Chandigarh University, Mohali 140413, Punjab, India;9. Department of Civil Engineering, Harcourt Butler Technical University, Kanpur 208002, Uttar Pradesh, India;10. Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia;11. Center for Transdisciplinary Research, Saveetha Institute of Medical and Technical Sciences, Saveetha University , Chennai, India;1. Department of Economics, Swedish University of Agricultural Sciences, P.O. Box 7013, 750 07, Uppsala, Sweden;2. Nordic Africa Institute, PO Box 1703, 75147, Uppsala, Sweden |
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| Abstract: | In the frame work of the Austrian Geoid 2000 project, the accuracy of the geoid has to be enhanced. One of the possibilities is to use an adapted reference field. The traditional remove/restore technique has the disadvantage of removing a part of the effect of the topography and its compensation twice. In order to avoid this double consideration the effect of the topographic-isostatic masses for the used fixed data window has been subtracted from the reference field yielding an adapted reference field. This adapted reference field has been used for the remove/restore technique. The paper shows a comparison between the geoid computed by the adapted technique using the enhanced reference field, the geoid computed by the traditional remove/restore technique and the geoid based on the RTM-method for the remove/restore process. All the models are checked against a geoid derived by GPS and levelling points. The geoid based on the adapted remove/restore technique shows the best results. |
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