REFINE OF REGIONAL OCEAN TIDE MODEL USING GPS DATA

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

Wang, F.^1¹ 

[1]National Geomatics Center of China, No.28 Lianhuachi West Road, Haidian District, Beijing, China^1

关键词: GPS;    Ocean Tide Model;    Time Series;    Spectral Inversion;    PPP;   

DOI  :  10.5194/isprs-archives-XLII-3-1685-2018

学科分类：地球科学(综合)

来源: Copernicus Publications

【 摘 要 】

Due to lack of regional data constraints, all global ocean tide models are not accuracy enough in offshore areas around China, also the displacements predicted by different models are not consistency. The ocean tide loading effects have become a major source of error in the high precision GPS positioning. It is important for high precision GPS applications to build an appropriate regional ocean tide model. We first process the four offshore GPS tracking station’s observation data which located in Guangdong province of China by using PPP aproach to get the time series. Then use the spectral inversion method to acquire eigenvalues of the Ocean Tidal Loading. We get the estimated value of not only ~12hour period tide wave (M2, S2, N2, K2) but also ~24hour period tide wave (O1, K1, P1, Q1) which has not been got in presious studies. The contrast test shows that GPS estimation value of M2, K1 is consistent with the result of five famous glocal ocean load tide models, but S2, N2, K2, O1, P1, Q1 is obviously larger.

【 授权许可】

CC BY