HR: 1340h
AN: G33A-0904 [Abstracts]
TI: VLBI-simulations for the estimation of degree-three Love and Shida numbers h3 and l3
AU: * Mendes Cerveira, P J
EM: mendes@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstrasse
27-29, Vienna, 1040, Austria
AU: Boehm, J
EM: jboehm@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstrasse
27-29, Vienna, 1040, Austria
AU: Wresnik, J
EM: wresnik@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstrasse
27-29, Vienna, 1040, Austria
AU: Spicakova, H
EM: hana@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstrasse
27-29, Vienna, 1040, Austria
AU: Schuh, H
EM: hschuh@mars.hg.tuwien.ac.at
AF: Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstrasse
27-29, Vienna, 1040, Austria
AB:
For the displacement due to solid Earth tides, the IERS Conventions 2003 recommend several corrections to
nominal values. One of these corrections is the in-phase contribution by using the real Love and Shida numbers
h3 and l3 at all degree-3 tides, where only the contribution of the moon is relevant. The maximum predicted radial
displacement is in the order of 1.7 mm. The nominal values are 0.292 for h3, and 0.015 for l3, respectively. Using
realistic station and source catalogues, we simulated VLBI (Very Long Baseline Interferometry) group time
delays, with a white noise going up to 2 cm, and taking into account the solid Earth tides displacement. Goal of
this study was to investigate whether degree-3 Love and Shida numbers can be unambiguously determined from
VLBI observations. Therefore, several setups w.r.t., e.g., station constellation, cutoff angle, time span, sampling
interval, and different levels of white noise were tested. Attention was put into the separability and correlation
between the degree-2 and degree-3 Love and Shida numbers.
DE: 1213 Earth's interior: dynamics (1507, 7207, 7208, 8115, 8120)
DE: 1219 Gravity anomalies and Earth structure (0920, 7205, 7240)
DE: 1225 Global change from geodesy (1222, 1622, 1630, 1641, 1645, 4556)
DE: 1229 Reference systems
DE: 1239 Earth rotation variations
SC: Geodesy [G]
MN: 2007 Fall Meeting