Simple Models of the Lower F2 Layer Near the Dip Equator


  • T. E. VanZandt,

  • W. L. Clark


For the lower F2 layer very near the dip equator it is assumed that vertical electromagnetic drift is important but that other contributions to the divergence of the ionospheric plasma are not. By also assuming constant scale heights and by making other usual approximations, a continuity equation is obtained that can be solved in terms of tabulated transcendental functions, for both day and night. It is shown that these solutions fit very well to electron density profiles measured by the incoherent scatter technique near the dip equator; this fit suggests that the assumptions and approximations are suitable. From these fittings, reasonable estimates of the rates of photo-ionization and recombination are obtained.