Abstract
Recent Earth Geopotential Models (EGMs) represent a great improvement to several applications related to gravity field modeling. These models offer higher accuracy and better resolution of the gravity field.
In this research, the most recent models’ behavior like EIGENs, EGM2008 as well as the classic EGM96, are analyzed and compared in Argentina, aiming to know which one suits better in the country.
This investigation also studies the differences between EGMs and geoid undulation values (calculated with height data from GPS and spirit leveling) and gravity anomalies (obtained from terrestrial gravimetric campaigns).
In principle, a great difference is detected with the satellite-only geopotential models. The EGMs that perform better results are those that include satellite altimetry and terrestrial information in their calculation.
The comparison between local data and the results of seven global models is shown with the residual statistic.
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Acknowledgements
The authors want to express their acknowledgement to the institutions, universities and colleagues that provide data for this research, especially to: Agrim. Rubén Rodríguez, Ing. Geog. Eduardo Lauría (Instituto Geográfico Militar), Agrim. Daniel Luengo, Dr. Daniel Del Cogliano, Lic. Raúl Perdomo and Dra. Claudia Tocho (Fac. de Cs. Astronómicas y Geofísicas de la Universidad Nacional de La Plata).
This work was partially supported by the “Agencia Nacional de Promoción Científica y Técnica” (PICT 01590).
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Pereira, A., Pacino, M.C. (2010). Evaluation of Recent Global Geopotential Models in Argentina. In: Mertikas, S. (eds) Gravity, Geoid and Earth Observation. International Association of Geodesy Symposia, vol 135. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-10634-7_51
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DOI: https://doi.org/10.1007/978-3-642-10634-7_51
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