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推导了基于相对论时空理论的“嫦娥一号”地月转移轨道段差分VLBI(ΔVLBI)的数学模型,在此基础上利用“嫦娥一号”实测的VLBI时延观测量和模拟的河外射电源时延观测量组成了ΔVLBI时延观测量,在参数最优先验精度下解算了不同弧段长度的“嫦娥一号”轨道及地球定向参数(EOP)等未知参数,并根据各参数的解算精度及外符合程度确定了最优观测弧段长度,并分析了该条件下的参数解算精度。
The mathematical model of the differential VLBI (ΔVLBI) of the moon-and-moon transfer orbit segment based on the relativistic spatio-temporal theory is deduced. Based on the VLBI delay observations and simulations measured by Chang’E-1 The observation of time delay of out-sourced radio-power sources constitutes the observation of ΔVLBI delay, and the unknown parameters such as “Chang’e-1” orbit and Earth Oriented Parameters (EOP) of different arc lengths are solved under the optimal prior precision of parameters. The length of the optimal arc length was determined according to the solution accuracy and the degree of external coincidence of each parameter. The accuracy of parameter interpretation under the condition was also analyzed.