CGGN (GNSS CORS), IGS CGGN Station Categories: IGS and Non-Streaming Info / Owner Photos Map Reviews Author: IGS Network CGGN is a GNSS continuously operating reference station (CORS) located in Toro Nigeria, as part of International GNSS Service (IGS) network. No Records FoundSorry, no records were found. Please adjust your search criteria and try again. Google Map Not LoadedSorry, unable to load Google Maps API. Driving Walking Bicycling Public Transport Miles Kilometers Previous Next