Preliminary results on the ionospheric structure at dawn time observed during HRIS campaigns

P. Dominici, C. Bianchi, L. R. Cander, G. De Franceschi, C. Scotto, B. Zolesi


Several campaigns of ionospheric vertical soundings with short-time interval between them (HRIS) have been recently performed at the ionospheric station in Rome. Some preliminary results concerning periods around local sunrise are presented. A cIear fading effect, due to the defocusing phenomena in the upper ionosphere, has been observed in different seasons


atmospheric gravity waves;travelling ionospheric disturbances

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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X