Local Geoid Modelling by the Combination of GPS Data and Geopotentialmodel
Research Area: | Volume 3,Issue 5, Sept. 2014 | Year: | 2014 |
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Type of Publication: | Article | Keywords: | Gauss, Geoid, Geopotential Model |
Authors: |
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Journal: | IJEIR | Volume: | 3 |
Number: | 5 | Pages: | 659-665 |
Month: | September | ||
Abstract: | An important advantage of the Global Positioning System GPS is providing a three dimensional position of a point in a Geodetic system. Since GPS derived heightsare ellipsoidal, the heights required for surveying, and engineering applications are Orthometric Geoidheights, transference from geodetic height Orthometric height must occur. Achieving using GPS derived Orthometricheight is one of the most important goals of Geodesy and has been the purpose of many studies. This approach will eliminate the costly and time-consuming levelling observations. One of the methods to achieve GPS derived Orthometric height is to have an accurate local Geoid model.
Publishing the new global GOCEGeopotential with a higher accuracy than previous models can contribute to acquiring a reliable model by combining this model with GPS data andtesting and evaluating it in Iran. This paper discusses the GOCEGeopotential model first and then combines this model with GPS data using appropriate basis functions to achieve an optimum outcome. The results of testing Geoid in southern Iran suggests an accuracy of 52 cm for the GOCEGeopotential model, while using a combination of GPS data with the GOCEGeopotential model suggests an accuracy of 33 cm for this model. |
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Full text: IJEIR_1136_Final.pdf
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