| 中国VLBI网软件相关处理机测地应用精度分析 |
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| 引用本文： | 刘磊,郑为民,张娟,舒逢春,童锋贤,童力.中国VLBI网软件相关处理机测地应用精度分析[J].测绘学报,2017,46(7):805-814. |
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| 作者姓名： | 刘磊 郑为民 张娟 舒逢春 童锋贤 童力 |
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| 作者单位： | 1. 中国科学院上海天文台, 上海 200030;2. 中国科学院射电天文重点实验室, 江苏 南京 210008;3. 上海市导航定位重点实验室, 上海 200030 |
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| 基金项目： | 国家自然科学基金，上海市优秀学术带头人项目，上海市领军人才项目，中国科学院关键技术人才项目，国家万人计划，The National Natural Science Foundation of China，The Shanghai Program of Shanghai Academic Research Leader，The Shanghai Outstanding Academic Leaders Plan，CAS Key Technology Talent Program，Ten Thousand Talent Program |
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| 摘 要： | 为支持国际VLBI大地测量数据处理,中国VLBI网(CVN)软件相关处理机完成了功能、性能升级,提高了信噪比,实现了以国际测地通用Mk4格式数据输出结果,可以直接被VLBI通用测地后处理软件用于时延数据解算。本文通过与国外软件相关处理机DiFX的实测数据比对,系统地分析了CVN软件处理机带宽综合残余时延和时延率精度、带宽综合总时延和时延率精度、信噪比和VLBI站坐标解算值。数据显示,CVN软件相关处理机已经达到了测地数据处理的精度要求,可以用于IVS国际联测数据处理。
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| 关 键 词： | VLBI 软件相关处理机 大地测量 信噪比 时延 时延率 |
| 收稿时间： | 2016-11-22 |
| 修稿时间： | 2017-03-21 |
Precision Analysis of Chinese VLBI Network Software Correlator for Geodetic Applications |
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| LIU Lei,ZHENG Weimin,ZHANG Juan,SHU Fengchun,TONG Fengxian,TONG Li.Precision Analysis of Chinese VLBI Network Software Correlator for Geodetic Applications[J].Acta Geodaetica et Cartographica Sinica,2017,46(7):805-814. |
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| Authors: | LIU Lei ZHENG Weimin ZHANG Juan SHU Fengchun TONG Fengxian TONG Li |
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| Institution: | 1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;2. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China;3. Shanghai Key Laboratory of Space Navigation and Positioning Techniques, Shanghai 200030, China |
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| Abstract: | To support international VLBI geodetic data processing, Chinese VLBI Network (CVN) software correlator has been updated for better performance and more features, including geodetic Mk4 data format output and improvement of signal to noise ratios.After updating, the visibility output of the software correlator can be sent to the standard VLBI geodetic postprocessing software to derive observables.To verify the correlation result, we have carried out correlation with both CVN software correlator and the popular DiFX correlator by using the same data set.We have compared the derived multi-band residual delay/rate, total delay/rate, signal to noise ratio, and the solved VLBI site positions.The comparison results demonstrate that the CVN software correlator has achieved the required precision, and therefore it can be used for IVS geodetic data processing. |
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| Keywords: | VLBI software correlator geodesy signal to noise ratio delay delay rate |
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