中国西太平洋海域1'×1'垂线偏差模型及精度评估

doi:10.11947/j.AGCS.2017.20160552

摘要/Abstract

摘要： 联合多种测高数据和重力异常数据，设计了观测点距离和测高精度融合的定权方法，采用最小二乘方法和Vening-Meinesz公式，分别构建了西太平洋海域（0°N—40°N， 105°E—145°E） 1'×1' 网格化垂线偏差数字模型。选取两个不同特征区域，将垂线偏差的两个数字模型和EGM2008模型三者进行相互比较分析。结果表明：卯酉分量η的均方根差大于子午分量ξ的均方根差，海底地形复杂的南海特征区域的垂线偏差均方根差大于西太平洋中部的均方根差，构建的两个垂线偏差模型总体均方根差优于1.6"。

关键词: 卫星测高, 垂线偏差, 加权最小二乘, Vening-Meinesz, EGM2008

Abstract: Weighted-calcaulation method is designed by combining distance between observing points with height-measurement accuracy. With weighted least squares and the Vening-Meinesz formula,two 1'×1' digital vertical deflection grid models on a certain West Pacific Ocean region (0°N-40°N,105°E-145°E) are respectively constructed by use of multiple altimetry data and gravity anomaly,and the two models are compared to EGM2008 on two chosen typical regions. The results show that, the prime vertical component η is slightly larger than the meridian component ξ, and the root mean square error of derived vertical deflection on Southern China Sea where there is the complex seafloor topography is larger than the middle of West Pacific ocean. In addition, the root mean square error of two constructed models are generally less than 1.6".

Key words: satellite altimetry, vertical deflection, weighted least squares, Vening-Meinesz, EGM2008

中图分类号:

P237

王虎彪, 王勇, 柴华, 鲍李峰. 中国西太平洋海域1'×1'垂线偏差模型及精度评估[J]. 测绘学报, 2017, 46(9): 1073-1079.

WANG Hubiao, WANG Yong, CAI Hua, BAO Lifeng. 1'×1' Vertical Deflection and Its Precision Evaluation on China West Pacific Ocean Region[J]. Acta Geodaetica et Cartographica Sinica, 2017, 46(9): 1073-1079.

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