Patent ID: 7075627

Claim:
A method for determining the date and time comprising: utilizing a wavepacket transmitter to measure the oscillation of the group velocity over a specified period of time, determining the Doppler redshift direction from said group velocity oscillation, and comparing said Doppler redshift direction verse the Earth's motion wherein the wavepacket transmitter comprises: a transmission source for generating a wavepacket, the wavepacket comprising a wavefront component; a signal controller for generating a signal pulse; a signal receiver for receiving the signal pulse; a selective-transmission device comprising a quantum barrier defining a transmission distance, said selective-transmission device being in signal communication with the transmission source, the signal controller, and the receiver such that the wavepacket is transmitted to the barrier and the wavefront component of the wavepacket tunnels through the barrier and across the transmission distance to the receiver; and a monitor in signal communication with the receiver for determining the centroid time for each of a plurality of wavepacket peaks; and an analyzer for computing the vector group velocity of light from the measured centroid times.