[17] Recently, S. Kopeikin has been actively involved in theoretical studies on relativistic geodesy and applications of atomic clocks for high-precision navigation and in geodetic datum.

[18] He has provided an exact relativistic definition of geoid,[19] and worked out the post-Newtonian concepts of the Maclaurin spheroid[20] and normal gravity formula.

[21] S. Kopeikin's workshop on spacetime metrology, clocks and relativistic geodesy is held in the International Space Science Institute (Bern, Switzerland).

He graduated with excellence from Department of Astrophysics of Moscow State University in 1983 where he studied general relativity under Leonid Grishchuk.

His Ph.D. thesis was advised by Yakov Borisovich Zel'dovich and presented a first general-relativistic derivation of the conservative and radiation reaction forces in the Post-Newtonian expansion of the gravitational field of a binary system of two extended, massive bodies.