@article{paperid:1085208, author = {Etemadfard, Hossein and Robert Heinkelmann and Masoud Mashhadi Hossainali and Harald Schuh}, title = {The Role of Spatial Gradient on Vertical Total Electron Content Extraction From Geodetic Very Long Baseline Interferometry Observation: Case Study CONT08 to CONT17‐L1}, journal = {Space Weather}, year = {2021}, volume = {19}, number = {6}, month = {June}, issn = {1542-7390}, keywords = {Ionospheric Model; VLBI; Spatial Gradient; CONT}, }