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Communication Dans Un Congrès Année : 2018

Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error

I. Nurul-Huda
  • Fonction : Auteur
Y. Ziegler
  • Fonction : Auteur
J.-Y. Richard
  • Fonction : Auteur
N. Liu
C. Gattano
S. Rosat
C. Bizouard
  • Fonction : Auteur

Résumé

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.
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Dates et versions

hal-02278150 , version 1 (04-09-2019)

Identifiants

Citer

S. Lambert, I. Nurul-Huda, Y. Ziegler, J.-Y. Richard, N. Liu, et al.. Measurement of Earth's Nutation by VLBI: Direct Estimates from VLBI Delays and a Discussion on the Error. 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. ⟨hal-02278150⟩
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