BIPM - Resolution 4 of the 18th CGPM

– the intergovernmental organization through which Member States act together
on matters related to measurement science and measurement standards.

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Resolution 4 of the 18th CGPM (1987)

Version française

Time comparisons using satellite links

The 18th Conférence Générale des Poids et Mesures

considering

that high-precision timing is rapidly becoming an essential part of modern telecommunications,
that two-way satellite links allow international time comparisons at very high precision,
that it appears possible to exchange pseudo-random-noise timing signals simultaneously but without interference with other uses of the channel,
that such pseudo-random-noise techniques also allow high-precision ranging,

recommends that the responsible national and international bodies support experiments over telecommunications satellite links for the study of synchronization techniques by means of pseudo-random-noise modulation within the framework of the international timing programs as part of the generation of International Atomic Time.