Address : Royal Observatory of Belgium Av. Circulaire 3 B-1180 Brussels Belgium Phone : +32-(0)2-7903951 Fax : +32-(0)2-3749822 [email protected]

Jean Marie Chevalier (MSc. in Modelling and Computational Science, 2009, University of Rennes I) has recently joined the GNSS group of the Royal Observatory. After an internship dealing with GNSS signal distribution within the ionosphere over Europe, his work now focusses on ionospheric modelling using GNSS observations in the frame of the Solar-Terrestrial Centre of Excellence.