摘要
本文选用GOCE、GRACE和DGM 3种地球重力场模型,以及卫星测高获取的平均海面高模型,计算了4个模型下的地转流并进行对比,结果表明:用GOCE重力场模型比用GRACE重力场模型计算的地转流中长波精度有一定提高,能展现出尺度更小、细节更丰富的地转流;利用移去恢复法可使全球稳态海面动力地形(MDT)的高频信息得到有效恢复,可显著提升地转流的细节特征。
Three kinds of earth gravity field models,namely GOCE,GRACE and DGM,as well as the average sea surface height model obtained by satellite altimetry are selected in this paper to calculate and compare the geostrophic current under these four models.The results show that:The accuracy of medium and long wave calculated using the GOCE gravity field model is higher than the GRACE,and it can show a smaller scale and more detailed geostrophic current.The high-frequency information of the global mean dynamic topography(MDT)is effectively restored by using the remove-restore method,which can significantly increase the detailed characteristics of the geostrophic current.
作者
杨艳
YANG Yan(Coal Geology Bureau of Gansu Province Team 149,Lanzhou,Gansu 730000,China)
出处
《测绘标准化》
2024年第2期24-30,共7页
Standardization of Surveying and Mapping
