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Radio communications Satellite operation GIC GPS users Aviation Sunspot number and F10.7 flux Twenty-seven day recurrent pattern of space weather

Information for aviation
Real-time total electron content (TEC) map over Japan

Variations of total electron contents (TECs) in Japan.
The accuracy of positioning using GPS is degraded because of variation of total electron contents (TECs) associated with geomagnetic stroms.

Current condition of ionsphere (by NICT Space Weather Group)
Geomagnetic activity:
Critical frequency of F-layer decreases in association with geomagnetic storms. This effect depends on seasons and is pronounced in summer season.
SWF (Dellinger effect):
X-ray and UV emissions from solar flare ionize day-side D-layer. HF radio wave fades out because of absorption of D-layer.
High-energy protons:
Information related to radiation hazards.
Auroral Electrojet (AE) index
A measure of global electrojet activity in the auroral zone.

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X-ray by GOES
X-ray by GOES ©NOAA/SWPC

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High-energy proton flux measured by GOES

High-energy proton flux measured by GOES
High-energy proton flux measured by GOES ©NOAA/SWPC

AE
AE ©NICT
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