East-Siberian Center for the Earth's Ionosphere Research (SDC ESCEIR)Institute of Solar-Terrestial Physics SB RAS
Upper Atmosphere Physics and Radiowave Propagation Department
Maximum usable frequencies on-line prediction
The on-line prediction procedure is based on the Newton interpolation formulae for a uniform distribution of the variable with first, second and third argument powers restrictions (Kurkin V.I. , Polekh N.M., Tchistyakova L.V. MAF operative prognosis for oblique ionosphere sounding// Issledovaniya po geomagnrtismu, aeronomii i phisike Solntsa. - SB RAS publishing, issue. 105., 1997). Interpolating polynomial coefficients are derived by finite differences calculated for a current model extrapolation interval and for past time interval experimental data.
On the basis of this algorithm we develop a computational scheme for real-time on-line prediction, which can perform sequentially the following operations:
These calculations have shown that the linear approximation of the on-line prediction has the best precision when using long-run prediction values independent of the interval and ionospheric disturbance level.