Weekly and daily radioelectric propagation conditions forecasting in the Tahiti region

Long term radioelectric propagation conditions forecasting is necessary to establish radioelectric links (antennas, frequencies, power and hours working determination). It gives the evolution of the conditions of propagation for a given probability. The day to day variation of the critical frequency of the F2 layer (foF2), one of the most important characteristics, presents a large variation in comparison with the median. It takes into account neither the fine evolution of both solar and magnetic activity nor ionospheric storms. Therefore it is necessary to establish weekly and daily forecasting. The purpose of this paper is to present a statistical model of foF2 above Tahiti which permits one to calculate the foF2 values a function of both solar and magnetic activity on a week or a day base.<>