Abstract
As it is well known, GNSS data analysis is a powerful tool to study geodynamic processes. However, observational methodologies and data analysis results should be adapted to determine local or even regional effects. It is particularly important in tectonic plate boundary areas when looking for subduction zone limits.
When using Continuous GNSS (CGNSS) observing receiver networks, a set of precise topocentric coordinates (e, n, u) for each place, will be available. Furthermore time series formed by the daily positions will produce the sites temporal variations. If those time series are long enough, horizontal components (e, n) use to show linear behaviors if there are no other geodynamic effect affecting the tectonic plates movement. Anyway the height component (u) uses to show periodical but not linear effects. But often time series are disturbed by different processes, as local subsidence, periodic dilatation compression effects, GNSS signal interferences, etc.
This paper shows a detailed topocentric coordinates time series study for sites belonging to what we call the SPINA network, which stands for South of the Iberian Peninsula, North of Africa Region. To avoid the above mentioned local effects, a priori quality control is carefully performed. Solutions are obtained by processed positioning with respect to a IGS reference station and by PPP processing (Precise Point Positioning), using the Bernese software. Results will be compared and combined. Then, a designed methodology, using filter processes, harmonic adjustments and wavelets will be applied. As final product we expect to get horizontal displacement model to describe the regional geodynamic main characteristics.
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Acknowledgements
We are thankful to all individuals and institutions contributing to GPS data collection and dissemination. Thanks are due to RAP (IECA, Instituto de Estadística y Cartografía de Andalucía, Junta de Andalucía), REGAM (Consejería de Obras Públicas y ordenación del Territorio, Región de Murcia) and MERISTEMUM (Consejeriá de Agua, Agricultura y Medio Ambiente, Región de Murcia) for the Murcia Region CGPS Networks, ERVA (Generalitat Valenciana) for Valencian Reference Stations Network, IGN (Instituto Geográfico Nacional), IGS (International GNSS Service), ROA (Real Instituto y Observatorio de la Armada) and from Portugal permanent stations by RENEP (Direcção Geral do Território). We would also like to thank Onsala Space Observatory for their calculation of the ocean tide loading parameters.
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Rosado, B. et al. (2016). SPINA Region (South of Iberian Peninsula, North of Africa) GNSS Geodynamic Model. In: Freymueller, J.T., Sánchez, L. (eds) International Symposium on Earth and Environmental Sciences for Future Generations. International Association of Geodesy Symposia, vol 147. Springer, Cham. https://doi.org/10.1007/1345_2016_252
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DOI: https://doi.org/10.1007/1345_2016_252
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-69169-5
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