... calculated using a kalman filter

TEC, Total Electron Content

Here you define a start and end time and then a graph showing TEC for Denmark in that time period will be displayed.

TEC data are available from the start of 1999 to the end of 2009. Please be aware that data gabs exist and blunders (caused by reinitialisation of the kalman filter) have not been removed.

Storm events appear clearly in the graph, see for instance the oktober 29-31 2002 and the november 19-21 2003 events.
Date Hour Minute Second
download csv