Recommendation 3 of the 82nd CIPM (1993)

Clock comparison by satellite laser techniques

The Comité International des Poids et Mesures,


  • the need for long distance time transfer at the highest possible level of accuracy,
  • that successful time transfer with a precision of 100 ps has been achieved between Western Europe and North America using LASSO (Laser Synchronization from Satellite Orbit) experiment,
  • that time transfer techniques, such as GPS (Global Positioning System), GLONASS (Global Navigation Satellite System) and two-way satellite time transfer, need an independent means of assessment of their accuracy,
  • that solutions have been proposed that may lead to dock synchronization by laser techniques using non-geostationary satellites,

recommends that the space agencies consider the installation on their satellites of appropriate equipment for dock comparison by satellite laser techniques.

DOI : 10.59161/CIPM1993REC3E

The reader should note that the official version of this Resolution is the French text

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