Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements

The Argentinean–German Geodetic Observatory (AGGO) is a fundamental geodetic observatory located close to the city of La Plata, Argentina. Two high-precision gravity meters are installed at AGGO: the superconducting gravimeter SG038, which is in operation since December 2015, and the absolute gravim...

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Autores principales:	Antokoletz, Ezequiel Darío, Wziontek, Hartmut, Tocho, Claudia Noemí, Falk, Reinhard
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2020
Materias:	Ciencias Astronómicas Geofísica AGGO Superconducting gravimeter Calibration factor Instrumental drift Absolute gravimeter Gravity reference function International Gravity Reference Frame
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/138483
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-138483
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas Geofísica AGGO Superconducting gravimeter Calibration factor Instrumental drift Absolute gravimeter Gravity reference function International Gravity Reference Frame
spellingShingle	Ciencias Astronómicas Geofísica AGGO Superconducting gravimeter Calibration factor Instrumental drift Absolute gravimeter Gravity reference function International Gravity Reference Frame Antokoletz, Ezequiel Darío Wziontek, Hartmut Tocho, Claudia Noemí Falk, Reinhard Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements
topic_facet	Ciencias Astronómicas Geofísica AGGO Superconducting gravimeter Calibration factor Instrumental drift Absolute gravimeter Gravity reference function International Gravity Reference Frame
description	The Argentinean–German Geodetic Observatory (AGGO) is a fundamental geodetic observatory located close to the city of La Plata, Argentina. Two high-precision gravity meters are installed at AGGO: the superconducting gravimeter SG038, which is in operation since December 2015, and the absolute gravimeter FG5-227, which has provided absolute gravity measurements since January 2018. By co-location of gravity observations from both meters between January 2018 and March 2019, calibration factor and instrumental drift of the SG038 were determined. The calibration factor of the SG038 was estimated by different strategies: from tidal models, dedicated absolute gravity measurements over several days and a joint approach (including the determination of the instrumental drift) using all available absolute gravity data. The final calibration factor differs from the determination at the previous station, the transportable integrated geodetic observatory, in Concepcion, Chile, by only 0.7‰, which does not imply a significant change. From the combined approach also the mean absolute level of the SG was determined, allowing to predict absolute gravity values from the SG at any time based on a repeatability of $$12\,\hbox {nm}/\hbox {s}^{2}$$; for the FG5-227 at AGGO. Such a continuous gravity reference function provides the basis for a comparison site for absolute gravimeters in the frame of the international gravity reference frame for South America and the Caribbean. However, it requires the assessment of the total error budget of the FG5-227, including the link to the international comparisons, which will be subject of future efforts.
format	Articulo Articulo
author	Antokoletz, Ezequiel Darío Wziontek, Hartmut Tocho, Claudia Noemí Falk, Reinhard
author_facet	Antokoletz, Ezequiel Darío Wziontek, Hartmut Tocho, Claudia Noemí Falk, Reinhard
author_sort	Antokoletz, Ezequiel Darío
title	Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements
title_short	Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements
title_full	Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements
title_fullStr	Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements
title_full_unstemmed	Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements
title_sort	gravity reference at the argentinean-german geodetic observatory (aggo) by co-location of superconducting and absolute gravity measurements
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/138483
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bdutipo_str	Repositorios
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Gravity reference at the Argentinean-German Geodetic Observatory (AGGO) by co-location of superconducting and absolute gravity measurements

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