A model of non-monotonically growing N/h/ profiles of the lower ionosphere under non-flare conditions
Abstract
An idea is suggested to explain the existence of a local minimum in the N(h) profiles which is in the height range of 65-75 km under nonflare conditions. This minimum is due to the dominating ionizing influence of the L-alpha radiation towards the influence of the X-radiation at heights around 70 km. A model of N(h) profiles is suggested approximated by three exponential and one parabolical function. These profiles may be obtained by measuring the absorption from a minimum of two measuring frequencies by the A3 method, combined with the vertical sounding by the Al method.
- Publication:
-
Pure and Applied Geophysics
- Pub Date:
- 1974
- DOI:
- 10.1007/BF00876803
- Bibcode:
- 1974PApGe.112..635A
- Keywords:
-
- Atmospheric Ionization;
- Atmospheric Models;
- Ionospheric Electron Density;
- Lower Ionosphere;
- Solar Activity Effects;
- Vertical Distribution;
- Absorption Spectra;
- Cosmic Rays;
- D Region;
- Electron Density Profiles;
- Galactic Radiation;
- Lyman Alpha Radiation;
- Solar Flares;
- Summer;
- Winter;
- Geophysics