基于主成分分析的相对重力观测零漂和固体潮提取  

Zero Drift and Solid Earth Tide Extracted from Relative Gravimetric Data with Principal Component Analysis

作　　者：于红娟[1] 郭金运[1,2] 李九龙[1] 穆大鹏[3] 孔巧丽[1,2] 

机构地区：[1]山东科技大学测绘科学与工程学院,青岛市前湾港路579号266590 [2]海岛(礁)测绘技术国家测绘地理信息局重点实验室,青岛市前湾港路579号266590 [3]中国科学院测量与地球物理研究所,武汉市徐东大街340号430077

出　　处：《大地测量与地球动力学》2015年第5期906-910,共5页Journal of Geodesy and Geodynamics

基　　金：国家自然科学基金(41374009);公益性行业科研专项经费(201412001);山东省自然科学基金(ZR2013DM009);山东科技大学研究基金(2014TDJH101)

摘　　要：利用主成分分析PCA提取2014-08-15~23CG-5相对重力仪静态相对观测的零点漂移和固体潮。结果显示,PCA提取的零点漂移值与最小二乘线性拟合结果非常一致,其差仅在10-2μGal/d量级;PCA估算的固体潮值与CG-5重力仪内部软件提供的固体潮模型计算值统计结果基本一致,两者之差均小于8μGal,均方根均小于5μGal。In this paper,a new algorithm of principal component analysis（PCA）is proposed to extract the zero drift and the solid Earth tide from static relative gravimetric data,as observed by CG-5relative gravimeter from Aug 15 to Aug 23,2014.The results of the linear drift extracted by PCA are very consistent with those calculated by the least squares linear fitting method,and the differences only reach to 10-2μGal/d order of magnitude.The statistical results of the solid earth tide extracted by PCA are quite consistent with results derived from the solid earth tide correction provided by CG-5gravimeter internal software.The statistical results of the differences of the two methods are both less than 8μGal,and the RMS for 9dare all less than 5μGal.

关 键 词：PCA 零点漂移 固体潮 相对重力测量 CG-5重力仪 

分 类 号：P223[天文地球—大地测量学与测量工程]