The Argentine-German Geodetic Observatory (AGGO) as a reference station of the International Terrestrial Gravity Reference Frame (ITGRF)

Ezequiel D. Antokoletz; Hartmut Wziontek; André Gebauer; Johanna Peterle; Andreas Börnchen; Alfredo Pasquaré; Erik Brachmann

doi:10.24215/18527744e007

Autores/as

Ezequiel D. Antokoletz Bundesamt für Kartographie und Geodäsie, Alemania https://orcid.org/0000-0002-7822-1300
Hartmut Wziontek Bundesamt für Kartographie und Geodäsie, Alemania https://orcid.org/0000-0003-4139-714X
André Gebauer Bundesamt für Kartographie und Geodäsie, Alemania https://orcid.org/0000-0002-4036-4648
Johanna Peterle Bundesamt für Kartographie und Geodäsie, Alemania https://orcid.org/0009-0002-0740-318X
Andreas Börnchen Bundesamt für Kartographie und Geodäsie, Alemania https://orcid.org/0009-0008-2613-0790
Alfredo Pasquaré Observatorio Argentino-Alemán de Geodesia, Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina https://orcid.org/0009-0007-9877-3165
Erik Brachmann Bundesamt für Kartographie und Geodäsie, Alemania https://orcid.org/0000-0002-3104-1812

DOI:

https://doi.org/10.24215/18527744e007

Palabras clave:

AGGO, gravimetría superconductora, gravimetría absoluta, función de referencia de gravedad, ITGRF

Resumen

El Sistema de Referencia Internacional de Gravedad Terrestre (ITGRS) fue adoptado por la Asociación Internacional de Geodesia (IAG) en 2023 para su uso en geociencias y metrología. Su realización, el Marco de Referencia Internacional de Gravedad Terrestre (ITGRF), se establece mediante un conjunto de estaciones de referencia que cuentan con una función de referencia de gravedad, que permita monitorear los cambios temporales del campo de gravedad y controlar gravímetros absolutos. El laboratorio de gravedad del Observatorio Geodésico Argentino-Alemán (AGGO) opera el gravímetro absoluto FG5-227 y el gravímetro superconductor SG038. En este trabajo, se evalúa la primera estimación de la deriva instrumental del SG038 mediante la combinación con un conjunto extendido de observaciones de gravedad absoluta, que ahora abarca un período de más de cuatro años. De esta manera, se pudo resolver una discrepancia progresiva entre las observaciones, y la nueva estimación permite que ambas series temporales concuerden entre sí dentro de la incertidumbre del FG5. Estos resultados, junto con la infraestructura de AGGO para realizar comparaciones regionales de gravímetros absolutos y el vínculo con comparaciones internacionales y regionales proporcionadas por el FG5-227, permiten proponer a AGGO como core station del futuro ITGRF.

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