| EGM 2008模型的无验潮测深技术 |
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| 引用本文： | 冯国正,曹磊,马耀昌,孙振勇,邹敏,黄安树.EGM 2008模型的无验潮测深技术[J].测绘科学,2018(1):26-30. |
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| 作者姓名： | 冯国正 曹磊 马耀昌 孙振勇 邹敏 黄安树 |
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| 作者单位： | 长江上游水文水资源勘测局,重庆,400020 |
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| 摘 要： | 针对无验潮测深技术高程基准转换的精度和复杂性问题,该文提出基于EGM 2008模型的无验潮测深技术,从而解决无验潮测深经GNSS测得的瞬时WGS-84的参考椭球高向正常高转换难题。经测试,EGM 2008仅利用少量控制点修正系统偏差后,就可以满足长距离低等级的水准测量精度要求。将EGM 2008模型应用于无验潮测深,坐标转换误差和无验潮测深精度均达到cm级,突破无验潮测深高程基准转换的瓶颈,实现实时、高效、高精度的无验潮测深。
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| 关 键 词： | EGM 2008模型 无验潮测深 高程基准转换 坐标转换 EGM 2008 model non-tidal sounding height datum conversion coordinate conversion |
Non-tidal sounding technology based on EGM 2008 model |
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| FENG Guozheng,CAO Lei,MA Yaochang,SUN Zhenyong,ZOU Min,HUANG Anshu.Non-tidal sounding technology based on EGM 2008 model[J].Science of Surveying and Mapping,2018(1):26-30. |
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| Authors: | FENG Guozheng CAO Lei MA Yaochang SUN Zhenyong ZOU Min HUANG Anshu |
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| Abstract: | According to the accuracy and complexity of the non-tidal sounding height datum conversion,this paper presents a non-tidal sounding technique based on EGM 2008 model,so as to solve the height datum conversion problem that instantaneous measured by GNSS height on WGS-84 reference ellipsoid to the normal height.After testing,EGM can only use a small number of control points to correct the system deviation,and can meet the low level of leveling accuracy in the long distance.The coordinate transformation error and non-tidal sounding measurement accuracy reach to the centimeter level by apply the EGM model to the non-tidal sounding measurement,and the bottleneck of no-test deep elevation datum conversion is exceeded,and the real-time,high efficiency and high precision without tide measurement is realized. |
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