Unit: metre
Data source: EPSG
Information source: Parametry Zemli 1990 Reference Document, Military Topgraphic Department (VTU) of the General Staff of Armed Forces of the Russian Federation.
Revision date: 2016-12-15
Remarks: Earth's angular velocity ω = 7.292115e-5 rad/sec; gravitational constant GM = 3986004.418e8 m*m*m/s/s.