中文摘要：

介绍了包括章动参数的空间VLBI数学模型,探讨了该模型用于大地测量解算的可行性;模拟了针对RADIOASTRON卫星的空间VLBI观测量及相关参数;利用所模拟的时延观测量研究分析包含章动参数的数学模型对EOP参数的可估计性,进而给空间VLBI数学模型中除EOP参数以外的参数赋予不同的先验误差,研究EOP参数对这些先验误差的灵敏度。

英文摘要：

Space very long baseline interferometry（SVLBI） is the unique space technology that can directly interconnect the three reference systems,which include the conventional inertial system （CIS） fixed in space and defined by radio sources,the conventional terrestrial system （CTS） fixed to the Earth and defined by a series of observing stations on the ground,and the dynamic reference system defined by the movement of a satellite.An SVLBI mathematical model with nutation parameters is discussed,and its feasibility for estimation of EOPs is discussed.Simulations have been done for the SVLBI observations and related parameters for the RADIOASTRON.With the results of simulation,the sensitivity of EOPs to the priori errors of the associated parameters which include the coordinates of the ground VLBI stations,the orbit parameters of RADIOASTRON satellite,clock parameters and the coordinates of radio source is studied.