4893 20200605145921.0 10.33012/2019.16940 DOI SCART-2020-0112 Fidalgo, Javier Definition of a European GNSS Timing Service 2019 NO Píriz, Ricardo Cezón, Anna Fernández, A Callewaert, K Bolchi, M Defraigne, Pascale Danesi, A Jeannot, M Boyero, Juan-Pablo Proceedings of the ION GNSS 2019 2019 827-839 pascale.defraigne@observatoire.be published in NONREF