海洋测绘2026，Vol.46Issue(3)：45-50,6.DOI:10.3969/j.issn.1671-3044.2026.03.010
顾及SLEL的GNSS垂向坐标时间序列非线性变化研究
Research on nonlinear variations of GNSS vertical coordinate time series with consideration of SLEL
摘要
Abstract
To address the significant nonlinear variations in GNSS vertical coordinate time series caused by environmental loading,this study selected 103 continuous GNSS stations in Europe from 2013 to 2023 and,in addition to the conventional corrections for hydrological loading,non-tidal atmospheric loading,and non-tidal oceanic loading,further introduced sea level loading as a global mass-conservation term to systematically investigate its correction effect on vertical coordinate time series.Annual and semi-annual signals were estimated using the least-squares method,and the correction performance was evaluated in terms of amplitude reduction rates and RMS variations.The results show that the three conventional environmental loading components reduce the mean annual amplitude by 49.39%and the mean semi-annual amplitude by 13.12%.After further introducing sea level loading,the annual and semi-annual amplitudes are additionally reduced by 6.37%and 2.17%,respectively.Although this actual calculation sea level loading does not lead to an obvious improvement in RMS,it can further explain the periodic variations in GNSS vertical coordinate time series.Incorporating sea level loading into environmental loading corrections helps provide a more complete characterization of the nonlinear variations in GNSS vertical coordinate time series.关键词
GNSS坐标时间序列/环境负载改正/非线性变化/海平面负载/质量守恒Key words
GNSS coordinate time series/environmental loading correction/nonlinear variations/sea level loading/mass conservation分类
天文与地球科学引用本文复制引用
于松超,殷敏,王苏伟,王式太,黄君君..顾及SLEL的GNSS垂向坐标时间序列非线性变化研究[J].海洋测绘,2026,46(3):45-50,6.基金项目
国家自然科学基金项目(42474057). （42474057）
