TWSTFT calibration involving four sites using a mobile sation on a trailer

In November 2012 the time transfer links between Physikalisch-Technische Bundesanstalt (PTB), Observatoire de Paris (OP/LNE-SYRTE), Swiss Federal Institute of Metrology (METAS), and TimeTech GmbH were calibrated using TimeTech's mobile TWSTFT calibration station for the first time.

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