A method and a system of processing circuitry for synchronizing a local clock and a remote clock are both disclosed. The method comprises calculating a time offset between the local clock and the remote clock from an interference pattern between a spatially aligned local pulse sequence from the local clock and remote pulse sequence from the remote clock and applying the time offset to a slave one of the local clock and the remote clock to synchronize the slave to match a master one of the local clock and the remote clock. The temporal resolution of the time offset is a fraction of a remote pulse width of the local pulse sequence and a remote pulse width of the remote pulse sequence.