5344 20210511101157.0 10.1007/s10291-021-01090-6 DOI SCART-2021-0088 Defraigne, Pascale Impact of Galileo-to-GPS-Time-Offset accuracy on multi-GNSS positioning and timing 2021 NO Pinat, Elisa Bertrand, Bruno GPS Solutions 25 2021 45 pascale.defraigne@observatoire.be published in REFERD