A sequential calibration technique for improving ionosphere models and single frequency positioning, case study Europe

Saeed Farzaneh1, Mona Kosary1, Maike Schumacher2 and Ehsan Forootan2, (1)School of Surveying and Geospatial Engineering, College of Engineering, University of Tehran, Tehran, Iran, (2)Geodesy Group, Department of Planning, Aalborg University, Aalborg, Denmark