Question: The IERS Reference Meridian (IRM), is the prime meridian (0° longitude) maintained by which organization, it is also the reference meridian of the Global Positioning System (GPS), originally Navstar GPS, is a space-based radionavigation system owned by the United States government and operated by the United States Air Force?
Sentence (from "IERS Reference Meridian"): It passes about 5.3 arcseconds east of George Biddell Airy's 1851 transit circle or 102.478 m at the latitude of the Royal Observatory, Greenwich.
Relevant evidence: No