In: Contributions to Geophysics and Geodesy, vol. 47, no. 3
Juraj Janák - Petr Vaníček - Ismael Foroughi - Robert W. Kingdon - Michael B. Sheng - Marcelo C. Santos
Detaily:
Rok, strany: 2017, 201 - 229
Kľúčové slová:
gravity field, geoid, Stokes-Helmert's method, downward continuation, topographical density variation, rigorous orthometric heights
O článku:
The aim of this paper is to show a~present state-of-the-art precise gravimetric geoid determination using the UNB Stokes-Helmert's technique in a simple schematic way. A detailed description of a practical application of this technique in the Auvergne test area is also provided. In this paper, we discuss the most problematic parts of the solution: correct application of topographic and atmospheric effects including the lateral topographical density variations, downward continuation of gravity anomalies from the Earth surface to the geoid, and the optimal incorporation of the global gravity field into the final geoid model. The final model is tested on 75 GNSS/levelling points supplied with normal Molodenskij heights, which for this investigation are transformed to rigorous orthometric heights. The standard deviation of the computed geoid model is 3.3 cm without applying any artificial improvement which is the same as that of the most accurate quasigeoid.
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FulltextAko citovať:
ISO 690:
Janák, J., Vaníček, P., Foroughi, I., Kingdon, R., Sheng, M., Santos, M. 2017. Computation of precise geoid model of Auvergne using current UNB Stokes-Helmert's approach. In Contributions to Geophysics and Geodesy, vol. 47, no.3, pp. 201-229. 1338-0540.
APA:
Janák, J., Vaníček, P., Foroughi, I., Kingdon, R., Sheng, M., Santos, M. (2017). Computation of precise geoid model of Auvergne using current UNB Stokes-Helmert's approach. Contributions to Geophysics and Geodesy, 47(3), 201-229. 1338-0540.