V - Z
WDC-C2/IONOSPHERE
The World Data Center (WDC) for Ionosphere was established on 1957, the international Geophysical Year (IGY). We have been exchanging, archiving and distributing observational data of ionosphere since the IGY. In addition, We, NICT continue ionospheric observations as routine at four observatories, Wakkanai(45.4N, 141.7E), Kokubunji(35.7N, 139.5E), Yamagawa(31.2N, 130.6E) and Okinawa(26.3N, 127.8E) every 15 minutes since more than 50 years, and provide these ionogram data automatically. We need to scale the ionograms manually for precise use, but for quick look we prepare automatic scaling. These data contribute to scientific use and the operation of aviation, broadband and telecommunications etc. In addition, as a part of space weather activity of NICT, we are constructing the forecast of ionospheric activity with neural network method. We will show the detailed analysis and results of these activities.