大地测量与地球动力学2014，Vol.34Issue(6)：50-54,59,6.
利用GRACE改正地球参考框架的季节性变化
INCORPORATING SEASONAL VARIATIONS OF GLOBAL AND REGIONAL TRF SOLUTIONS BASED ON GRACE MEASUREMENTS
摘要
Abstract
In this study,a seasonal loading model was imported into the ITRF2008 solutions based on GRACE (Gravity Recovery And Climate Environment)measurements to simulate hydrological loading,and comparison of the model to the original ITRF2008 for global reference frame realization was made.The seasonal components were simulated using either annual and semi-annual terms or a non-parametric approach.Misfitting of the WRMS(Weighted Root Mean Squares) after 7-parameter transformation calculated with the model decreases compared to that with the original ITRF2008 for more than 80％ of daily GPS solutions.In general,the range of seasonal variations of daily solution at all sites is slightly larger in use of the seasonally augmented ITRF model.However,the results calculated with the model are more consistent with observed seasonal variations for 84％ of the GPS sites.The findings mean that the use of the range of seasonal variations in the coordinate time series is decreased in use of ITRF2008 without seasonal terms relative to the true loading deformation,and that the results calculated with the TRF model included seasonal variations are more consistent with the observed GPS time series.关键词
季节性变化/GRACE/地球参考框架Key words
seasonal variation / GRACE / TRF alignment分类
天文与地球科学引用本文复制引用
邹蓉,丁开华,杨少敏,王琪,李志才..利用GRACE改正地球参考框架的季节性变化[J].大地测量与地球动力学,2014,34(6):50-54,59,6.基金项目
国家自然科学基金项目(41304014、41204001、41274037) （41304014、41204001、41274037）
国家863计划项目(2013AA122501) （2013AA122501）
海岛(礁)测绘技术国家测绘地理信息局重点实验室项目(2013B04) （礁）
地球内部多尺度成像湖北省重点实验室项目(SMIL-2014-10). （SMIL-2014-10）
