Buenos Aires Province - Argentina (AGGOQG_2025)
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Authors: A.R. Gómez, et al.
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Created: 2025
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Resp: A.R. Gómez
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Description:
AGGOQG_2025 is a local, high-precision, high-resolution, pure-gravimetric quasigeoid model developed for the area surrounding AGGO and LPGS, two International Height Reference Frame (IHRF) stations located in the Province of Buenos Aires, Argentina, covering latitudes 36°S to 31°S and longitudes 61°W to 55°W, with a 0.03° grid resolution. The model purpose is to determine the IHRF vertical coordinate at these stations. Its computation followed Molodensky’s formulation of the Geodetic Boundary Value Problem (GBVP) and employed the remove–compute–restore (RCR) strategy. Long-wavelength components were modeled using the XGM2019e Global Geopotential Model (GGM) up to degree and order 600. Topographic contributions were modeled via Residual Terrain Modeling (RTM) using the SRTM v4.1 Digital Elevation Model (DEM). Residual height anomalies were calculated with either the 1D-FFT technique incorporating the Wong-Gore modification of Stokes’ kernel or the Least-Squares Collocation (LSC) technique. All computational steps were performed with the GRAVSOFT software package. Validation against 111 GNSS/leveling points yielded an estimated precision of 0.063 m after applying a four-parameter fit for both processing techniques.
Reference:
A.R. Gómez, C. Tocho, E.D. Antokoletz, S.R. Cimbaro (2025). Local quasigeoid modeling at Argentinean stations of the International Height Reference Frame (IHRF). Journal of Geodesy, 99, 94. DOI: 10.1007/s00190-025-02018-5
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