Approximating the probability distribution laws for critical frequency deviations of the ionospheric F2 layer by fourth-degree polynomials
Abstract
One of important tasks in studying the ionosphere is to determine its perturbation level. Determining and predicting the ionosphere perturbation degree is necessary for solving practical problems, as well as for a theoretical study of processes occurring in it. There is also an urgent problem of creating a new daily-seasonal ionospheric perturbation scale. One of approaches to solve these problems can be to determine the distribution laws for deviations in the critical frequencies of the F2 layer from their median values calculated for previous 27 days. The optimal method for calculating polynomial dependencies for determining the probability distribution laws for deviations in the critical frequency of the ionospheric F2 layer for the longitude chain of observation stations in cases when they are different from the normal one is suggested in this article. The optimal degree of the approximating polynomial is determined. Polynomial coefficients are calculated. The percentage of data from the present period that exceeds the limits of the obtained dependencies in each case is calculated. The analysis of the obtained results is carried out, as a result of which the possibility of describing the behavior of the ionosphere by the obtained dependencies is determined.
- Publication:
-
Journal of Physics Conference Series
- Pub Date:
- September 2020
- DOI:
- 10.1088/1742-6596/1632/1/012004
- Bibcode:
- 2020JPhCS1632a2004I