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Table 3 Estimated parameters for the smoothed f[2− 3 t] component model (summer)

From: Method for modeling of the components of ionospheric parameter time variations and detection of anomalies in the ionosphere

Time period Parameters of the model for the 1st difference of the smoothed component
First parameter Second parameter
07.06.1979–24.06.1979 −0.4032 −0.4099
20.06.2001–07.07.2001 −0.5268 −0.5916
18.06.2002–06.07.2002 −0.6156 −0.6099
General model parameters (solar maximum) −0.50 −0.58
20.06.1984–10.07.1984 −0.8254 −0.6382
28.06.2004–17.07.2004 −0.8485 −0.7834
13.08.2007–01.09.2007 −0.9465 −0.9156
General model parameters (solar minimum) −0.83 −0.73