Disentangling ionospheric refraction and diffraction effects in GNSS raw phase through Fast Iterative Filtering technique

Vincenzo Romano1,2, Hossein Ghobadi1,3, Luca Spogli1,2, Massimo Cafaro3, Lucilla Alfonsi1, Antonio Cicone4,5 and Nicola Linty6, (1)Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy, (2)SpacEarth Technology, Rome, Italy, (3)University of Salento (UNISALENTO), Innovation Engineering, Lecce, Italy, (4)Istituto Nazionale di Alta Matematica, Rome, Italy, (5)University of L'Aquila, L'Aquila, Italy, (6)Finnish Geospatial Research Institute (FGI-NLS), Masala, Finland