Temporal and spatial variation of ionosphere can influence our daily communication activities.By solving the one-year global positioning system(GPS) data of Sha
Sichuan-Yunnan region in China,a tectonic transition belt where earthquakes occurred frequently and intensely,has a distinct variation characteristic of gradien
Satellite gravity data fusion with multi-type and huge-amount is one of the hot topics in physical geodesy.After a brief review of dynamic approach,the CHAMP-only and GRACE-only gravity fields by usin