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Short-term forecast of ionospheric parameters by oblique sounding data

We present the application of the periodicity search technique for the solution of extrapolation problem for time series when the advance time of the forecast is 24 hours. This technique doesn't demand an equidistance of counting, has a little sensitive to missing data and can be used as the short-term forecast for several days ahead with background of 5 days. The considered technique has been used on the data obtained by chirp sounding network of ISTP SB RAS during the periods of strong and weak solar activity.