Completion of the nationwide GPS-gravimetric geoid solution for Hungary |
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| Institution: | 1. Water Researches and Technologies Center Borj-Cedria (CERTE), BP 273 Soliman 8020, Tunisia;2. Advanced Geosciences Europe, Spain;3. King Abdulaziz University, Jeddah, Saudi Arabia;1. Benha University, Faculty of Science, Department of Geology, Farid Nada Street 15, Benha 13518, Egypt;2. Cumhuriyet University, Department of Geological Engineering, 58140 Sivas, Turkey;3. Batman University, Department of Petroleum Engineering, 72100, Batman, Turkey;4. International Agency for Minerals Policy (MinPol GmbH), Dundlerinweg 120/1, A2753 Dreistetten, Austria;1. Geology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt;2. Exploration Geology Department, Institute for Applied Geosciences, Technical University of Berlin, Germany;3. Faculty of Science and Engineering, American University, Cairo, Egypt;1. Slovak Academy of Sciences, Banská Bystrica, Slovak Republic;2. G-trend, s.r.o., Bratislava, Slovak Republic;3. Comenius University, Bratislava, Slovak Republic;4. Slovak University of Technology, Bratislava, Slovak Republic |
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| Abstract: | The establishment of the Hungarian National GPS Network (OGPSH) had been completed in 1997. It is exclusively settled on the traditional horizontal network sites, no leveling benchmarks were included. The OGPSH network consists more than 1100 GPS points, but less than 30% of the sites have trustful leveled heights. Our task was to supply the remaining points with cm-accuracy heights above the geoid in a uniform system. For this purpose a technique had been developed using the GPS data and the geoid information available. A specialized geoid solution, covering the whole country was computed and used for supporting the GPS-heighting procedure.The OGG98B GPS-gravimetric geoid solution made the GPS-heighting very simple and efficient. The accuracy of the technique was extensively tested and proved to be accurate not worse than ±3 cm. Higher residuals were found only at some points, where the height information was questionable. The improved technique is planned to be used in the 3rd order leveling network in Hungary.This paper shortly summarizes the computational procedure of the GPS-gravimetric geoid and presents some results on the GPS-heighting had been performed in the OGPSH network. |
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