| 顾及时变的参考框架转换研究 |
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| 引用本文： | 刘常娟,郝卫峰.顾及时变的参考框架转换研究[J].测绘科学,2012(4):19-21. |
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| 作者姓名： | 刘常娟 郝卫峰 |
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| 作者单位： | 湖南省水利水电勘测设计研究总院;武汉大学测绘遥感信息工程国家重点实验室 |
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| 摘 要： | 在传统的大地坐标参考框架转换中,参考点都被固定在同一个历元。由于各种地球动力学现象的存在,以大地测量为目的的静态参考系统已不存在,同时随着高精度参考框架的连续观测和测定,参考框架的转化必须顾及时变性。本文讨论了时变参考框架转换中2个互逆的过程,采纳了相似转换中参考点之间的内在约束来克服转换中人为的公式简化和秩亏问题。通过数值计算分析,该方法成功实现了坐标框架之间的转换,并保持了尺度、旋转和平移参数及其变化率精度的独立性。
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| 关 键 词： | 时变 参考框架 相似转换 |
Time-variant similar transformation for terrestrial reference frame |
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| LIU Chang-juan HAO Wei-feng.Time-variant similar transformation for terrestrial reference frame[J].Science of Surveying and Mapping,2012(4):19-21. |
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| Authors: | LIU Chang-juan HAO Wei-feng |
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| Institution: | LIU Chang-juan① HAO Wei-feng②(①Hunan Hydro & Power Design Institute,Changsha 410007,China;②State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079,China) |
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| Abstract: | In the traditional terrestrial coordinate reference frame transformation,the reference points are fixed in the same epoch.Due to geodynamics,the static geodetic reference system no longer exists.With the continuous high-precision observation and measurement of the reference frame,the time-variant should be taken into account.This paper discussed two mutually inverse conversion process of the time-variant reference frame,and similar transformation based on the internal constraints between the reference points was adopted to overcome the artificial formula simplification and rank defect.Through numerical analysis,it was proved that the method could successfully convert between the terrestrial coordinate frames and kee Pthe accuracy of the scale,rotation and translation parameters and their rate independence. |
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| Keywords: | time-variant terrestrial reference frame similar transformation |
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