Site map An overview of the available content on this site. Keep the pointer still over an item for a few seconds to get its description. Research Highlights Ionospheric forecasts Validation of ionospheric specification models Ionospheric reconstruction profilers TIDs identification and propagation pattern Effective scale height characteristics in the topside ionosphere Identification of post-seismic effects in the topside ionosphere Projects Publications Athens Digisonde Facilities Group The Ionospheric Group of NOA Members of the Group News Contact