Strong range spread-F observed with Digisonde measurement at Hainan station Shi, Jiankui ; Zherebtsov, Gelii ; Wang, Xiao ; Wang, Guojun ; Ratovsky, Konstantin ; Sheping, Shang ; Romanova, Elena Abstract Publication: 39th COSPAR Scientific Assembly Pub Date: July 2012 Bibcode: 2012cosp...39.1782S