| 重力信息反演海底地形的非线性影响研究分析 |
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| 引用本文： | 苏通,李姗姗,范雕,邢志斌,李卫民.重力信息反演海底地形的非线性影响研究分析[J].海洋测绘,2019,39(4):1-5. |
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| 作者姓名： | 苏通 李姗姗 范雕 邢志斌 李卫民 |
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| 作者单位： | 91650部队,广东广州,510320;解放军信息工程大学地理空间信息学院,河南郑州,450001 |
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| 基金项目： | 国家自然科学基金(41274029；41404020；41774021；41774018；41504018)；信息工程大学校自立课题(2017503902；2018222) |
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| 摘 要： | 基于Paker理论导纳函数模型,研究分析了频率域海底地形非线性项对重力异常与重力异常垂直梯度贡献的量级。通过对日本某海域数值实验结果表明,频率域海底地形非线性项对重力异常的影响需要考虑到三次项,对重力异常垂直梯度量级的影响需要考虑到四次项。研究结果对于提高利用重力异常和重力异常垂直梯度反演高精度海底地形具有应用价值。
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| 关 键 词： | 重力异常 重力异常垂直梯度 海底地形 Paker理论 导纳函数 |
Research and Analysis of the Non-linear Influence of Gravity Information Inversion on Seabed Topography |
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| SU Tong,LI Shanshan,FAN Diao,XING Zhibin,LI Weimin.Research and Analysis of the Non-linear Influence of Gravity Information Inversion on Seabed Topography[J].Hydrographic Surveying and Charting,2019,39(4):1-5. |
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| Authors: | SU Tong LI Shanshan FAN Diao XING Zhibin LI Weimin |
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| Institution: | 91650 Troops,Guangzhou 510320 ,China;Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450001 ,China |
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| Abstract: | Based on Paker theory admittance function model,the magnitude of the contribution of nonlinear term of the seafloor topography to the vertical gradient of gravity anomaly and gravity anomaly is studied.The numerical experiments in a sea area in Japan show that the influence of the nonlinear term of the seabed topography on the gravity anomaly needs to consider the cubic term,and the influence of the vertical gradient magnitude of the gravity anomaly needs to consider the fourth term.The research results have application value for improving the high-precision seabed topography by using gravity anomaly and gravity anomaly vertical gradient. |
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