This near real-time ionospheric total electron content (TEC) map is produced at IPS by using the IRI-90 ionospheric model with real-time foF2 data observed at the ionosonde stations distributed in this region.

The map shows colour contours of TEC in units of 10¹⁶ electrons/m².

The data on this map can be used to get an estimate of the corrections to be applied to satellite navigation measurements to account for the extra delay in the transmission of the radio signals between the satellite and a receiver on earth due to the presence of the ionosphere.