Enhancing Automatic Scaling of Ionograms Using AI and O-X Mode Separation

NICT) has been observing ionosphere by ionosondes for over 70 years in Japan.At present, four ionosondes at Wakkanai (Sarobetsu), Kokubunji, Yamagawa, Okinawa (Ogimi) are automatically operated and controlled from Tokyo.Ionospheric parameters such as foF2 and foEs are automatically scaled from the ionograms.The scaled parameters are provided through our web site (https://wdc.nict.go.jp/Ionosphere/index.html) and used for monitoring ionospheric disturbances.