Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error
International audience Accurate measurements of the Earth nutation by VLBI provide insights into the deformability of and the coupling mechanisms at the core-mantle and core-inner core boundaries. We propose here to adjust nutation amplitudes directly to VLBI delays, as opposed to the traditional me...
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ftccsdartic:oai:HAL:hal-02278150v1 2023-05-15T18:29:46+02:00 Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error Lambert, S. Nurul-Huda, I. Ziegler, Y. Richard, J.-Y. Liu, N. Gattano, C. Rosat, S. Bizouard, C. Centre National de la Recherche Scientifique (CNRS) M2A 2019 Laboratoire d'Astrophysique de Bordeaux Pessac (LAB) Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Dynamique globale et déformation active (IPGS) (IPGS-DGDA) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) svalbard, Norway 2018-06-03 https://hal.archives-ouvertes.fr/hal-02278150 en eng HAL CCSD hal-02278150 https://hal.archives-ouvertes.fr/hal-02278150 BIBCODE: 2019ivs.conf.204L International VLBI Service for Geodesy and Astrometry 2018 General Meeting Proceedings: "Global Geodesy and the Role of VGOS - Fundamental to Sustainable Development", Eds. Kyla L. Armstrong, Karen D. Baver, Dirk Behrend, NASA/CP-2019-219039, p. 204-208 https://hal.archives-ouvertes.fr/hal-02278150 International VLBI Service for Geodesy and Astrometry 2018 General Meeting Proceedings: "Global Geodesy and the Role of VGOS - Fundamental to Sustainable Development", Eds. Kyla L. Armstrong, Karen D. Baver, Dirk Behrend, NASA/CP-2019-219039, p. 204-208, Jun 2018, svalbard, Norway [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] info:eu-repo/semantics/conferenceObject Conference papers 2018 ftccsdartic 2021-12-25T23:46:44Z International audience Accurate measurements of the Earth nutation by VLBI provide insights into the deformability of and the coupling mechanisms at the core-mantle and core-inner core boundaries. We propose here to adjust nutation amplitudes directly to VLBI delays, as opposed to the traditional method consisting of fitting nutation amplitudes to time-domain nutation series. However, the complexity of the VLBI analysis chain makes the formal error on the parameters somehow obscure and disconnected from a realistic error based on, e.g., empirical tests of robustness and errors on models. In this work, we address some striking differences between formal and empirical errors. Conference Object Svalbard Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Norway Svalbard |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] |
spellingShingle |
[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] Lambert, S. Nurul-Huda, I. Ziegler, Y. Richard, J.-Y. Liu, N. Gattano, C. Rosat, S. Bizouard, C. Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error |
topic_facet |
[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] |
description |
International audience Accurate measurements of the Earth nutation by VLBI provide insights into the deformability of and the coupling mechanisms at the core-mantle and core-inner core boundaries. We propose here to adjust nutation amplitudes directly to VLBI delays, as opposed to the traditional method consisting of fitting nutation amplitudes to time-domain nutation series. However, the complexity of the VLBI analysis chain makes the formal error on the parameters somehow obscure and disconnected from a realistic error based on, e.g., empirical tests of robustness and errors on models. In this work, we address some striking differences between formal and empirical errors. |
author2 |
Centre National de la Recherche Scientifique (CNRS) M2A 2019 Laboratoire d'Astrophysique de Bordeaux Pessac (LAB) Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Dynamique globale et déformation active (IPGS) (IPGS-DGDA) Institut de physique du globe de Strasbourg (IPGS) Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS) |
format |
Conference Object |
author |
Lambert, S. Nurul-Huda, I. Ziegler, Y. Richard, J.-Y. Liu, N. Gattano, C. Rosat, S. Bizouard, C. |
author_facet |
Lambert, S. Nurul-Huda, I. Ziegler, Y. Richard, J.-Y. Liu, N. Gattano, C. Rosat, S. Bizouard, C. |
author_sort |
Lambert, S. |
title |
Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error |
title_short |
Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error |
title_full |
Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error |
title_fullStr |
Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error |
title_full_unstemmed |
Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error |
title_sort |
measurement of earth's nutation by vlbi: direct estimates from vlbi delays and a discussion on the error |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.archives-ouvertes.fr/hal-02278150 |
op_coverage |
svalbard, Norway |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Svalbard |
genre_facet |
Svalbard |
op_source |
International VLBI Service for Geodesy and Astrometry 2018 General Meeting Proceedings: "Global Geodesy and the Role of VGOS - Fundamental to Sustainable Development", Eds. Kyla L. Armstrong, Karen D. Baver, Dirk Behrend, NASA/CP-2019-219039, p. 204-208 https://hal.archives-ouvertes.fr/hal-02278150 International VLBI Service for Geodesy and Astrometry 2018 General Meeting Proceedings: "Global Geodesy and the Role of VGOS - Fundamental to Sustainable Development", Eds. Kyla L. Armstrong, Karen D. Baver, Dirk Behrend, NASA/CP-2019-219039, p. 204-208, Jun 2018, svalbard, Norway |
op_relation |
hal-02278150 https://hal.archives-ouvertes.fr/hal-02278150 BIBCODE: 2019ivs.conf.204L |
_version_ |
1766213121207173120 |