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

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

Time period

Constant

Parameters of the model for the smoothed component

Parameters of the model for the first difference of the smoothed component

First parameter

Second parameter

Third parameter

First parameter

Second parameter

Third parameter

03.01.1982–20.01.1982

16.832

−0.195

−0.1745

0.8029

−0.5443

−0.5505

0.4451

19.12.2011–08.01.2012

13.746

−0.1677

−0.1809

0.80866

−0.5567

−0.5744

0.42407

29.12.2012–24.01.2013

13.089

−0.3028

−0.3231

0.65231

−0.5858

−0.5936

0.39376

General model parameters (solar maximum)

16.00

−0.22

−0.22

0.77

−0.62

−0.63

0.36

22.01.1987–10.02.1987

10.688

−0.0931

−0.1326

0.84567

−0.4579

−0.4669

0.53618

15.01.2006–04.02.2006

11.042

−0.1716

−0.2479

0.7101

−0.7254

−0.7371

0.22256

09.02.2008–27.02.2008

10.576

−0.3156

−0.2979

0.62768

−0.7993

−0.7656

0.20138

General model parameters (solar minimum)

11.00

−0.19

−0.21

0.75

−0.62

−0.63

0.36