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Real-Time Data

Latest Data

Ionosonde in Japan

Latest Ionograms: Wakkanai Kokubunji Yamagawa Okinawa
Summary Plots
Sporadic E (Es) Layers: Last 2 hours Last 2 days
Oblique propagation frequency summary (derived from automatically scaled vertical sounding data)

GPS-TEC in Japan

Two-dimensional TEC Perturbation Maps
TEC Temporal Variations