HR: 1330h
AN: G22A-0300 INVITED     [PDF]
TI: Information about the core from VLBI data.
AU: * Dehant, V M
EM: v.dehant@oma.be
AF: Royal Observatory of Belgium, 3 avenue Circulaire, Brussels, B1180 Belgium
AB: The Earth rotation and orientation are observed with very high precision techniques. Scientists are using the accumulation of recent data in order to get information about the Earth rotation variations: length-of-day (LOD), polar motion and nutations. The core has a large influence on the LOD at decadal timescale, and in the nutations. In particular the analysis of the Earth orientation in space from Very Long Baseline Interferometry, has provided the scientific community with information about the coupling between the inner core and the outer core and between the liquid core and the mantle at the nutation timescale. It also provides the values of the rotational normal mode periods and amplitudes. The paper will review the situation.
DE: 1213 Earth's interior--dynamics (8115, 8120)
DE: 1229 Reference systems
DE: 1239 Rotational variations
DE: 7207 Core and mantle
SC: Geodesy [G]
MN: 2003 Fall Meeting