空间VLBI与天文地球动力学

Space VLBI and Its Applications in Astrogeodynamics

介绍了空间VLBI的精密定轨及其在天文地球动力学应用研究中的最新进展．指出因为空间VLBI的时延和时延率观测量同时涉及到射电参考系、动力学参考系和地固参考系，所以特别适合于参考系的直接连接工作．对为评价参考系连接的精度而发展的协方差分析理论也作了介绍，还分析了将时延和时延率资料用于精密定轨时遇到的困难及其解决办法．

This paper reviews the latest progress in the space VLBI orbit determination and its astrogeodynamic applications. The Space VLBI observables involve simultaneously radio celestialreference frame, dynamical reference frame and terrestrial reference frame. Therefore it is the onlyexisting technique that is able to connect the above three independent reference frames directly.As new, precise observables, space VLBI delay and delay rate can also be used to improve theaccuracy of orbit determination. Theory of Covariance analysis to assess the possible precision ofreference connecting and stochastic perturbation model to treat the solar radiation pressure areintroduced.