The Use of the Total Electron Content Measured by Navigation Satellites to Estimate Ionospheric Conditions

Figure 2

Illustration of differences of τ(obs) from τ(med) and τ(IRI) in disturbed days. Corresponding specified days are indicated by different colour in title of figures. Curves for τ(IRI) are shown by black dots. Curves for τ(med) are shown by hollow circles. Values of τ(obs) in specific disturbed days are given by curves of various colours, corresponding days are specified beside designations.