Practical relativistic clock synchronization for high-accuracy space astrometry

Christophe Le Poncin-Lafitte
2009 Proceedings of the International Astronomical Union  
AbstractFuture high-accuracy space astrometry missions, such as Gaia and SIM, will need a time-tagging of observations consistent with General Relativity nowadays used as standard background for global data processing scheme. In this work, we are focusing on the realization of the onboard time scale. The onboard clock, being not ideal and consequently tainted with systematic biases, has to be carefully calibrated to the ideal relativistic proper time of the satellite. We present here a modeling
more » ... of this essential step to provide a reliable relation between the onboard time and TCB, a time scale suitable for global data processing.
doi:10.1017/s1743921309990603 fatcat:7gwimpkkivdmvmri4voskleseu