Plasma concentrations and temperatures in the earth's mid- to low latitude F-region and plasmasphere

Two methods are developed for providing reliable values of plasma concentration, field - aligned velocity and temperature. They are used to investigate certain ionospheric phenomena. The first of the two methods is appropriate to mid- latitude studies; here magnetic field lines may be assumed straight which greatly simplifies calculations. The second method is appropriate to low latitude studies where the curvature of magnetic field lines must be taken into account. (author)