Comparison of deformations resulting from GPS and VLBI data: problems and preliminary results.

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

This paper discusses preliminary results related to the comparison of long baselines obtained from GPS and VLBI data processing in Europe. This comparison was carried out with the aim to check the agreement of the crustal deformation fields derived by the two techniques. An approach based on the theory of stationary and ergodic stochastic processes is proposed. This approach is able to evaluate temporal correlations of the estimated distances. The results show these correlations are remarkable within each series. The residuals with respect to a linear trend were filtered via least squares collocation but, after having removed the stochastic signal, there is no evidence of significant correlations between the filtered GPS and VLBI residuals.

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