IERS Reference Meridian
INTERNATIONAL PRIME MERIDIAN USED FOR GPS AND OTHER SYSTEMS
Longitude 0 degrees E; Longitude 0 degrees W; 0 Longitude; Longitude 0 degrees; International Reference Meridian; 0° longitude; 0 longitude
The IERS Reference Meridian (IRM), also called the International Reference Meridian, is the prime meridian (0° longitude) maintained by the International Earth Rotation and Reference Systems Service (IERS). It passes about 5.