Fig. 3.From: A new global empirical model of the electron temperature with the inclusion of the solar activity variations for IRISolar activity correction function—an example for 550 km equinox. Asterixes represent the normalized values from the normalized latitudinal profiles for low, medium and high solar activity. The dashed line represents a mathematical interpolation/extrapolation in solar activity using the three values (see more detailed explanation in the text). The values pertaining to the symbols see Fig. 2(a).Back to article page