Effect of Seasonal Anomaly or Winter on The Refractive Index of in Height of The Ionospheric

Abstract-- In this paper, we deal with the effect on the refractive index of seasonal anomaly in height of the ionospheric F2 peak for both, collisional and collisionless cases in the by using the real geometry of Earth’s magnetic field for north hemisphere. It is possible to say that there is an anti-symmetric harmony between the electron density and the all waves (for collisional and collisionless cases) at in hour when the seasonal anomaly occurs while there is an exact harmony in the real part of extra-ordinary wave (Z≠0)