基于卫星测高数据的海底地形反演及分析

发布时间：2018-06-12 21:54

本文选题：海底地形 + 卫星测高　；参考：《航天器工程》2017年03期

【摘要】：由于受限于观测条件,海底地形模型在分辨率与精度两方面较陆地和大地水准面模型有很大的差距。传统的海底地形测量是利用声呐船测技术获取水深数据,但该测量方法测量效率低、测量点分布稀疏不均匀。文章详细研究并推导了基于卫星测高数据进行海底地形反演的方法,采用卫星测高重力异常数据和少量船测水深数据,对北太平洋部分区域进行了海底地形反演,得到1′×1′分辨率的海底地形模型,并对反演关系中的非线性项进行了分析。仿真结果验证了此方法的可行性,指出海底地形与重力异常数据在一定波段内以线性关系为主,叠加非线性二次项和三次项可较好地提升反演精度,高于三次项的部分对反演的结果没有明显的作用,可以忽略。
[Abstract]:Due to the limited observation conditions, the resolution and accuracy of the submarine terrain model are much lower than that of the land and geoid models. The traditional submarine topographic survey uses sonar ship survey technology to obtain the depth data, but the efficiency of this method is low, and the distribution of measuring points is sparse and uneven. In this paper, the inversion method of submarine topography based on satellite altimetry data is studied and deduced in detail. The submarine topographic inversion of parts of the North Pacific Ocean is carried out by using satellite altimetry gravity anomaly data and a small amount of ship bathymetric data. The 1'脳 1 '-resolution submarine terrain model is obtained, and the nonlinear terms in the inversion relationship are analyzed. The simulation results verify the feasibility of this method. It is pointed out that the linear relationship between submarine topography and gravity anomaly data is dominant in a certain band, and the inversion accuracy can be improved by superposing nonlinear quadratic and cubic terms. The part above the cubic term has no obvious effect on the inversion results and can be ignored.
【作者单位】：航天东方红卫星有限公司;钱学森空间技术实验室;北京空间飞行器总体设计部;
【基金】：国家自然科学基金(41404019,41674026) 中国科学院太空应用重点实验室开放基金(CSU-WX-A-KJ-2016-044)
【分类号】：P228.3;P229.1

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