Description: RIO2QG_LSC_2025 is a local, high-precision, high-resolution, pure-gravimetric quasigeoid model developed for the area surrounding RIO2, an International Height Reference Frame (IHRF) station located in the Province of Tierra del Fuego, Argentina, covering latitudes 56°S to 51°S and longitudes 71°W to 64°W, with a 0.03° grid resolution. The model’s purpose is to determine the IHRF vertical coordinate at this station. 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 700. Topographic contributions were modeled via Residual Terrain Modeling (RTM) using the SRTM v4.1 Digital Elevation Model (DEM). Residual height anomalies were calculated with the Least-Squares Collocation (LSC) technique. All computational steps were performed with the GRAVSOFT software package. Validation against 41 GNSS/leveling points yielded an estimated precision of 0.066 m after applying a four-parameter fit. The geoid model is provided in ISG format 2.0 (ISG Format Specifications), while the file in its original data format is available at the model ISG webpage.
Global identifier:
Doi(
"10.5880/isg.2025.006",
)
Tags: Argentinien ? Geografische Koordinaten ? Software ? Geodäsie ? Modellierung ? Daten ? Rückstand ? EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS ? EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITY ? Geoid model ? ISG ? Least Squares Collocation ? Tierra del Fuego Province ?
License: Creative Commons Namensnennung 4.0
Language: Englisch/English
Issued: 2025-01-01
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