Zero Drift and Solid Earth Tide Extracted from Relative Gravimetric Data
with Principal Component Analysis
1 College of Geodesy and Geomatics, Shandong University of Science and Technology, 579 Qianwangang Road, Qingdao 266590, China〖JP〗
2 Key Laboratory of Surveying and Mapping Technology on Island and Reef, NASMG,
579 Qianwangang Road, Qingdao 266590, China
3 Institute of Geodesy and Geophysics, CAS, 340 Xudong Street, Wuhan 430077, China
Abstract 〗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-5 relative 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 10-2 μGal/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-5 gravimeter internal software. The statistical results of the differences of the two methods are both less than 8 μGal, and the RMS for 9 d are all less than 5 μGal.
YU Hongjuan,GUO Jinyun,LI Jiulong et al. Zero Drift and Solid Earth Tide Extracted from Relative Gravimetric Data
with Principal Component Analysis[J]. jgg, 2015, 35(5): 906-910.
YU Hongjuan,GUO Jinyun,LI Jiulong et al. Zero Drift and Solid Earth Tide Extracted from Relative Gravimetric Data
with Principal Component Analysis[J]. jgg, 2015, 35(5): 906-910.
