Dominici, P., Bianchi, C., Cander, L.R., De Franceschi, G., Scotto, C. and Zolesi, B. 1994. Preliminary results on the ionospheric structure at dawn time observed during HRIS campaigns. Annals of Geophysics. 37, 1 (Apr. 1994). DOI:https://doi.org/10.4401/ag-4235.