A New Method of Predicting the Ionospheric F2 Layer in the Asia Oceania Region

The new method of predicting the ionospheric F₂ layer in the Asia Oceania region is based on cross-correlation theory of ionospheric parameters and the twelve-month running mean of sunsport number (R₁₂). The R₁₂ is substituted for the ionospheric prediction index Ic produced from f₀F₂ of Chongqing, and the B coefficients interpolated by three different R₁₂ data are not used, which can reduce the error caused by converting R₁₂ into Ic. Lots of data at several sounding stations have been prudently selected and suplemented based on the old predicting method, and the $ B$ coefficients needn't be computed any more, which can avoid interpolation error resulting from the intermediate link. A comparison of several predicting results shows that the new edition is much more accurate.