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

NASA helps maintain the worldwide standard called the International Terrestrial Reference Frame, or ITRF, and recently contributed to an update issued by the International Earth Rotation and Reference ...

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Beaudoin says the ITRF is actually a combination of reference frames derived by four independent space-based surveying techniques: Satellite Laser Ranging (SLR), Very Long Baseline Interferometry ...

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 ...