上海和乌鲁木齐射电望远镜的超高精度同波束VLBI观测
High-accuracy same-beam VLBI observations using Shanghai and Urumqi Telescopes
查看参考文献23篇
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文摘
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上海天文台和国家天文台乌鲁木齐天文站的25米射电望远镜于2008年参加了日本月球卫星SELENE的两个子卫星Rstar和Vstar的同波束较差VLBI观测.当Rstar和Vstar的角距小于0.1°时,上海-乌鲁木齐基线的X频段的较差相位时延的测量残差为0.15 mm·rms,比现有VLBI的最小残差改善了1～2个量级.当Rstar和Vstar的角距小于0.56.时,也成功得到S频段的较差相位时延,其测量残差为毫米级.利用VLBI和多普勒及测距数据,Rstar和Vstar的定轨精度提高到了数米.超高精度的同波束较差VLBI技术将极大地提高我国的深空探测器的精密测定轨能力,并将被用于我国首个火星探测器"萤火一号"(YH-1)和俄罗斯的"福布斯"探测器(Phobos-grunt)的精密测定轨中. |
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来源
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中国科学. G辑
, 物理学，力学，天文学,2009,39(10):1410-1418 【核心库】
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关键词
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同波束
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较差VLBI
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相位时延
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精密定轨
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地址
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1.
中国科学院上海天文台, 上海, 200030
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日本国立天文台, 日本, 0230861
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日本东京大学, 日本, 1130033
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中国科学院国家天文台乌鲁木齐天文站, 新疆, 乌鲁木齐, 830011
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1672-1780 |
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学科
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天文学 |
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基金
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国家自然科学基金
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中国科学院知识创新工程重要方向项目
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文献收藏号
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CSCD:3757289
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