| 双月球探测器相对定位的同波束VLBI技术研究 |
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| 引用本文： | 郑鑫,刘庆会,吴亚军,贺庆宝.双月球探测器相对定位的同波束VLBI技术研究[J].宇航学报,2014,35(9):1030-1035. |
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| 作者姓名： | 郑鑫 刘庆会 吴亚军 贺庆宝 |
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| 作者单位： | 1. 中国科学院上海天文台，上海 200030;
2.中国科学院大学，北京 100049 |
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| 基金项目： | 中国科学院百人计划；国家自然科学基金(11273049,11073048)；国家863计划(2012AA121203)；上海市导航与定位重点实验室(3912DZ227330001） |
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| 摘 要： | 针对着陆器和月球车数传信号无法在同一通道内记录的问题，提出利用射电源观测修正不同通道装置内部时延的同波束甚长基线干涉测量（VLBI）方法，解算含微小偏移量的差分相时延。利用嫦娥二号两个X波段VLBI信号观测数据和上海、昆明、乌鲁木齐三个台站的同波束VLBI器地对接数据验证了提出的方法。结果表明解算的含微小偏移量差分相时延形式误差在皮秒量级，系统误差在0.5ns(纳秒)左右，有望把月球车的相对定位精度提高至数十米。
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| 关 键 词： | VLBI 差分相时延 月球车 着陆器 |
| 收稿时间： | 2013-06-19 |
Research on Same Beam VLBI Technique for Relative Position Determination of Two Lunar Spacecrafts |
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| ZHENG Xin,LIU Qing hui,WU Ya jun,HE Qing bao.Research on Same Beam VLBI Technique for Relative Position Determination of Two Lunar Spacecrafts[J].Journal of Astronautics,2014,35(9):1030-1035. |
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| Authors: | ZHENG Xin LIU Qing hui WU Ya jun HE Qing bao |
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| Institution: | 1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China；
2.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A method for obtaining small bias differential phase delay is proposed by use of the same beam VLBI (SBI) technique and observation of quasar to correct the different channels’ equipment delays. The effectiveness of the method is confirmed by using CE 2 X band VLBI observation data and SBI test data obtained at Shanghai, Kunming and Urumqi stations. These results show that the differential phase delay with a random error of ps and a system error of 0.5 ns can be obtained, the relative position of the rover with an error of tens of meters may be determined. |
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| Keywords: | SBI Differential phase delay Rover Lander |
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