No abstract

Two electron density profiles have been obtained for the quiet day midlatitude D region by means of ground to rocket radio propagation experiments. These profiles are interpreted between 85 and 70 km in terms of solar Lyman α ionization of nitric oxide. The role of 2 to 8 angstrom X rays is shown to be unimportant to the formation of the D region for the quiet solar conditions present during the two rocket flights. The electron collision frequency in the D region is shown to be subject to significant variations which are correlated to pressure variations of the stratosphere.

No abstract

No abstract

No abstract