Seminar Title:	An extension of the IAU framework for reference systems
Speaker:	Prof. Sergey Kopeykin
Affiliation:	(University of Missouri-Columbia, USA)
When:	Friday Afternoon, Nov. 26th, 3:30 p.m
Where:	Room 416, Office Block, 2 West Beijing Road (PMO, CAS)
	Welcome to Attend
	( PMO Academic Committee & Academic Circulating committee)

　Abstract　 

　IAU-2000 resolutions on the reference frames set up a solid theoretical foundation for implementing general relativity in computer-based data processing algorithms to reach an unambiguous physical interpretation of high-precision astronomical observations. I briefly remind the content of the IAU-2000 resolutions and discuss the possible directions of their further development in order to take into account the decadal progress in observational techniques and computer technology. The particular subjects, which are addressed in more detail, are: 1) the spacetime transformations and the scaling of the metric tensor; -2) the PPN parameters and the gauge invariance of equations of motion; -3) the hierarchy of astronomical reference frames - from the solar system to cosmology.