Timescale dissemination using global navigation satellite systems and applications thereof

A method and apparatus for dissemination of a timescale signal (T2) from at least one server site to at least one client site is provided. The method comprises running, at each server site, a server Global Navigation Satellite System, GNSS, process (202(i)) configured to generate a server GNSS output raw data signal (R7(T2); R7(T2(i))) based at least on one or more first satellite signals; generating a precise orbits and clocks signal (C8(T2); C10(T2); T4(Tppp-T2); T9(Tppp-T2)) embedding said timescale signal (T2) based on all server GNSS output signals (T2(i); T7(T2(i))) and broadcasting said precise orbits and clocks signal (C8(T2); C10(T2); T4(Tppp-T2); T9(Tppp- T2)) via a telecom network (206); running, at each client site, a client Global Navigation Satellite System, GNSS, process (201(c)) configured to generate a client GNSS output raw data signal (R5(T1(c))) based on a client clock signal (T1(c)) and based on one or more second satellite signals, running a client Precise Point Positioning, PPP, process (203(c)) configured to receive said client GNSS output raw data signal (R5(T1(c))) and said precise orbits and clocks signal (C8(T2); C10(T2); T4(Tppp-T2); T9(Tppp-T2)) and to generate a difference signal (T1(c)-T2) between said client clock signal (T1(c)) and timescale signal (T2).