Joint segmentation of multiple GPS coordinate series Title : Segmentation multiple de séries de coordonnées GPS

For the first time, a joint general segmentation procedure of multiple GPS coordinate series is proposed for nearby stations. It allows simultaneously estimating station-specific trends, seasonal signals and a common ground motion signal between series from adjacent stations. An extension of the model and the estimation procedure, which is an iterative procedure, proposed following Picard et al. (2011) and Bertin et al. (2014) is considered in order to take into account for the specificities of the GPS data. The tested approach has been shown to be efficient in providing meaningful offsets and is found to be a relevant method for avoiding segmenting the true physical signal. Mots-clés : Segmentation, Homogénisation, GPS, Séries temporelles