基于卫星测高的海域大地水准面  

MARINE GEOID FROM SATELLITE ALTIMETER DATA

作　　者：彭富清[1] 张瑞华[1] 石磐[1] 夏哲仁[1] 杨元喜[1] 

机构地区：[1]西安测绘研究所,西安710054

出　　处：《地球物理学报》2003年第4期462-466,共5页Chinese Journal of Geophysics

基　　金：中国人民解放军总参谋部主要课题 ( 95 40 3 ) .

摘　　要：利用测高数据的一次差分计算海域垂线偏差 ,有效降低了动力海面地形和系统残差对垂线偏差的影响 ;然后根据扰动场元间的协方差函数是具有各态历经性的平稳随机函数这一特征 ,提出了利用垂线偏差精确逼近海域大地水准面的协方差函数 .而海域大地水准面的精确确定 ,为从测高数据中精确分离动力海面地形提供了条件 .本文还利用Topex Poseidon、ERS 1 2测高数据计算了全球海域大地水准面和动力海面地形 ,证明了本文所述方法是科学合理的 .We first computes the deflections of the vertical line over sea from the altimeter data using the simple difference, which reduces greatly the effect of the Dynamic Ocean Topography (DOT) and systematic bias on the deflections of the vertical line. Then, we present a covariance function to approach precisely the marine geoid from the deflections of the vertical line in view of the homogeneity and isotropy of the covariance functions of the anomalous potential elements. And the determination of the geoid makes it possible to separate precisely the DOT from the sea surface height (SSH). Finally, the global marine geoid and DOT are predicted from the Topex/Poseidon and ERS-1/2 altimeter data, which proves that the above-mentioned method is scientific and reasonable.

关 键 词：卫星测高 海域垂线偏差 动力海面地形 系统残差 海域大地水准面 协方差函数 

分 类 号：P229.2[天文地球—大地测量学与测量工程] P228.3[天文地球—测绘科学与技术]