The ITU Radiocommunication Assembly considering a) the need for operational time transfer and comparison at the highest possible accuracy levels over intercontinental distances; b) that there is a growing worldwide need for inexpensive time transfers to accuracies less than 1 ps, which are fully automatic (in particular, capable of resuming synchronization after power losses without human intervention) and which possess adequate characteristics with respect to reliability, availability and cost.
ITU-R TF.767-2 FRENCH-2001 history
2001ITU-R TF.767-2 FRENCH-2001 Use of global navigation satellite systems for high-accuracy time transfer