A Search for the Free Inner Core Nutation in VLBI Data
Résumé
We investigate the time-frequency spectrum of VLBI nutation series, including operational series released by IVS analysis centers. We focus on the interannual prograde band, where the signal as- sociated with the free inner core nutation (FICN) should be searched. We do not conclude on the detection of the FICN. However, we point out some signi cant but unexplained structures within the FICN frequency band. We also investigate whether their origin is geophysical or they are artifacts due to VLBI analysis methods or reference frame effects.
| Origine | Fichiers produits par l'(les) auteur(s) |
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