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Currently the SWACI services are migrated to the Ionosphere Monitoring and Prediction Center (IMPC). This may cause downtimes of several products or parts of this webpage. To get latest news and product updates please visit impc.dlr.de!




Rate of change of TEC index - Global

The Rate of change of TEC index (ROTI) can be used as a measure to detect disturbances in the ionosphere.

We calculate the ROTI from real-time data streams and associate the calculated values to the ionospheric pierce points. The world map is overlaid with a grid and the averaged ROTI values falling in a certain tile are shown.


ROTI world map - 1 minute mean Top
ROTI world map - 1 minute maximum Top
ROTI world map - 1 hour maximum Top
ROTI world map - 24 hour maximum Top