Manuel Hernandez-Pajares is a Full Professor and Head of the UPC-IonSAT research group at ”Universitat Politecnica de Catalunya”, Barcelona, Spain. He has been working on Global Navigation Satellite Systems (GNSS) since 1989, and in new algorithms for precise ionospheric sounding and navigation since 1994. He has been the chair of the International GNSS Service (IGS) Ionosphere WG (2002–2007), and the PI of tens of international scientific projects. He has published more than 100 papers in peer-reviewed journals within the first and second quartile of impact factor, with more than 8000 citations (h=42 and i10=119). Manuel is also co-authoring six patents, most of them international.