Data Archive

NICT Ionospheric Observatories

Observations in Japan Ionosonde / Ionospheric Observations GPS network / Monthly Mean TEC Distribution (Japanese Only) HF Direction Finder / HF Transequatorial Propagation Experiment    Observations in Southeast Asia SEALION / Equatorial Ionospheric Observations    Observations at Syowa Station, Antarctica HF Receiver / HF Field Strength (Japanese Only) RIO Meter / Cosmic Noise Absorption (Japanese Only)    Observations in the World World Data Center for Ionosphere / Non-digital archives

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