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Real-time ionogram near your location

Real-time ionogram (automatically updated) in the vicinity of where your IP address is thought to be located. Source: Global Ionospheric Radio Observatory (GIRO) DIDBase1

Legend

An annotated Digisonde directional ionogram for educational purposes. “Plasma frequency” is synonymous for “critical frequency,” a measure of electron density. Source: Wikimedia Commons

Acknowledgements

References

1.
Global Ionospheric Radio Observatory (GIRO). DIDBase. http://giro.uml.edu/
5
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