The reference frames from which observers view quantum events can themselves have multiple possible locations at once — an insight with potentially major ramifications.

More than a statement of “what do we stand for”, or same-same promises of “being different” or “moving the dial”, a frame of reference provides a coherent world-view that is more persistent than ...

This provides GNSS users access to the reference frame through coordinate functions for a global set of reference stations. In response, NGS will soon compute the multi-year Continuously Operating ...