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针对中国深空探测中航天器高精度定位需求,提出一种基于相位参考成图技术的探测器单基线相对定位方法。该方法利用中国深空站长弧段跟踪优势,形成良好的UV覆盖,满足在中国仅有两个深空站的条件下获得高精度测量结果的要求,解决单基线高精度干涉测量的难题。利用中国深空测控网喀什至佳木斯基线开展了嫦娥三号月球探测器天线间的相对定位试验,确定了嫦娥三号着陆器全向天线相对定向天线的位置,天平面角分辨率优于0.5 mas(毫角秒),充分验证了该方法的有效性。该研究对以后嫦娥五号任务及火星探测中无线电干涉测量相对定位具有一定参考价值。
Aimed at the needs of high-precision spacecraft positioning in China’s deep space exploration, a new single-baseline relative positioning method based on phase reference mapping is proposed. This method utilizes the advantage of the tracking of deep arc stations in China’s deep space to form a good UV coverage and meets the requirements of obtaining high-precision measurement results under the condition that there are only two deep-space stations in China and solves the problem of high-precision single-baseline interferometry. The relative positioning experiment of Chang’e 3 lunar probe antenna was carried out using the baseline from Kashgar to Jiamusi in China’s deep space monitoring and control network. The position of the relative directional antenna of Chang’e III omnidirectional antenna was determined. The resolution of celestial plane angle was better than 0.5 mas (Millisecond seconds), fully validated the effectiveness of the method. This study has some reference value for the relative positioning of the radio interference measurement in Chang’e-5 mission and Mars exploration.