Effect of Ionization Transport on the Equatorial F-Region

Abstract

IN his discussion of the Appleton ionospheric anomaly¹, Mitra² pointed out that ionization produced in the region of the dip equator would diffuse downwards along magnetic field lines and hence contribute to the electron concentration at higher latitudes. Rishbeth et al.³ and Kendall⁴ have shown that diffusion and the usual production and loss processes cannot, however, produce the observed anomalous behaviour. It is clear that transport of ionization by other means is also important.