Modelo Geoidal para la Zona Norte de Colombia: Propuesta Metodológica

Abstract

The International Association of Geodesy (IAG) and The International Union of Geodesy and Geophysics (IUGG) issued a resolution in July 2015, with the consent of the United Nations Initiative on Global Geospatial Information Management (UN-GGIM) for the definition and implementation of an International Height Reference System (IHRS) promoting the enhancement and compatibility of space navigation and positioning systems, including Global Navigation Satellite Systems (GNSS), and universal access to them. In this way Colombia, the determination of an updated geoidal model with greater precision is necessary for the definition of a new national vertical reference system, this allows defining local parameters that enable the connection between vertical systems of neighbouring countries and their implementation to IHRS and IHRF. Therefore, this work develops a pilot test in the calculation of a quasi-geoidal model in the north of the country, applying the methodology of least squares by placement (LSC 3D), including in its process marine and continental data, presenting a difference of observable heights compared to the estimated ones of around 4 cm.