Relativistic Effects on Astro-geodynamics

Astro-geodynamics involves the measurement or monitoring of variation of spatial motion of the Earth as a whole and mass motion of each layers of the Earth, for instance the atmosphere, ocean, lithosphere, mantle and the core, using space-based techniques, and the study on their dynamic relation.The space and time which belongs to the realm of the General Relativity are concerned. With the rapid increase of space-based observational accuracy, the relativistic effects on the Astro-geodynamics must be taken into account to make full use of information of higher accurate observation. The relativistic effects concerned include (1) establishment of relativistic reference system; (2) relativistic equations of motion (translational and rotational) in an adequate reference system for the observer and the observed object; (3) propagation of an electromagnetic signal between the observed object and the observer, including the deflection of light,time delay of light, gravitational redshift, etc.; (4) conversion from the coordinate-dependent results into coordinate-independent ones of real physical meaning, such as proper direction, proper time; (5) clarification of some of the basic concepts and definitions, such as meaning of GM, definition of the astronomical unit, concepts of the ecliptic and the equinox.The principal relativistic effects on the Astro-geodynamics are briefly reviewed.