联合多卫星测高数据确定中国近海及其邻域垂线偏差

海洋学研究 ›› 2012, Vol. 30 ›› Issue (3): 54-59.

联合多卫星测高数据确定中国近海及其邻域垂线偏差

万剑华¹, 王莉娟¹, 范陈清², 杨俊钢²

1.中国石油大学(华东) 地球科学与技术学院, 山东青岛 266555;
2.国家海洋局第一海洋研究所, 山东青岛 266061

收稿日期:2012-02-22 修回日期:2012-05-24 出版日期:2012-09-15 发布日期:2022-11-30
作者简介:万剑华(1966-),男,山东单县人,教授,博士生导师。E-mail: wjh66310@163.com .
基金资助:
国家海洋公益性行业科研专项经费资助项目(201105032 1)

Determination of vertical deflection over China seas and their vicinity from the multi-satellite altimetric data

WAN Jian-hua¹, WANG Li-juan^1,2, FAN Chen-qing², YANG Jun-gang²

1. School of Geoscience, China University of Petroleum( East China ), Qingdao 266555, China;
2. First Institute of Oceanography, SOA, Qingdao 266061, China

Received:2012-02-22 Revised:2012-05-24 Online:2012-09-15 Published:2022-11-30

摘要/Abstract

摘要： 联合T/P 数据、T/P新轨道数据、Jason-1数据、Jason-1 新轨道数据、Jason-2数据、Geosat/GM数据、Geosat/ERM数据、Envisat RA-2数据、ERS-1/ERM和ERS-2/ERM数据,基于EGM2008重力场模型,用相邻测高点大地水准面高度的一次差分求沿轨垂线偏差,然后基于最小二乘原理,采用求最小范数逆的方法,直接解算中国近海及其邻域(0°~42°N,102°~138°E) 2'X2'分辨率网格点垂线偏差子午分量和卯酉分量。计算结果与EGM2008模型垂线偏差相比,子午分量的RMS为0.91", 卯酉分量的RMS为0.27"。

关键词: 卫星测高, 垂线偏差, 海洋大地测量

Abstract: Based on EGM2008 gravity field model, together with multi-satellite altimetric data,including T/P,new T/P,Jason-l,new Jason-l,Jason-2,Geosat/GM, Geosat/ ERM,Envisat RA-2,ERS-1/ERM and ERS-2/ERM data,the along-track vertical deflections was obtained with the primary difference of two successive geoidal heights. Then according to the least square principle, the meridional component and prime vertical component of the vertical deflections gridded in 2'X2' for China seas and their vicinity(0°~42°N,102°~138°E) were determined. When computing the vertical deflection of the grid point with along track vertical deflections, discrete measurement points in the 4' X 4' region around the grid point were used. The normal equation was easy to be ill-conditioned because the determinant of ATPA is close to zero. In this paper the solution of the observation equation was obtained with the method of computing minimum norm invers. The result was compared with the data of EGM2008 model, the corresponding RMS of the difference is 0. 91” at meridian component and 0. 27”at prime vertical component, and compared with the data of EIGEN_ CG01C model, the corresponding RMS of the difference is 1. 98”at meridian and 2.54" at prime vertical. The vertical deflection data computed in this paper and the data of EGM2008 model were respectively compared with EIGEN_ CG01C model,and the comparison results were roughly the same. It shows that the calculated resulst and EGM2008 model are matched in accuracy. We also analyzed the points with lager error compared with the EGM2008 model, and mapped the distribution of the points with differences greater than 10” at meridian and 5” at prime vertical respectively. It is found that almost all points having lager error were located in the coastal waters or near the islands, this is because the altimeter echo signals were disturbed in the coastal waters and near the islands.

Key words: satellite altimeter, deflection of the vertical, marine geodetic survey

中图分类号:

P229.2

万剑华, 王莉娟, 范陈清, 杨俊钢. 联合多卫星测高数据确定中国近海及其邻域垂线偏差[J]. 海洋学研究, 2012, 30(3): 54-59.

WAN Jian-hua, WANG Li-juan, FAN Chen-qing, YANG Jun gang. Determination of vertical deflection over China seas and their vicinity from the multi-satellite altimetric data[J]. Journal of Marine Sciences, 2012, 30(3): 54-59.

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