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

Figure 5

Deviations of the calculated values of foF2 from experimental foF2(obs) for following options: (1) initial model IRI (black dots), (2) joint use of TEC(obs) and τ(IRI) (dark blue circles), and (3) joint use of TEC(obs) and τ(med) (red dots) in (a) and efficiency coefficients for stations Juliusruh, Thule, and Ascension Island.

(a)

(b)