HF COMMUNICATION EFFECTS: PHYSICS AND CHEMISTRY OF THE IONOSPHERE.
Abstract
The ionosphere from 50 to 700 km is discussed in an attempt to provide information of value and interest to radio communicators. Diurnal, seasonal, and solar cyclical variations of the ionosphere are considered as well as effects of diffusion, turbulence and winds, tidal and wave motions, chemical reactions, and magnetic disturbances. Ionization by extreme UV photons, solar X-rays, and Lyman-alpha and cosmic radiation are presented as functions of solar activity. The ionization and deionization processes (dissociation, recombination, charge transfer, and ion-atom interchange) that control ion and electron densities in the ionosphere are discussed. Detailed models of (1) the quiet ionosphere, (2) sudden ionic disturbances, (3) polar cap absorption events, and (4) ionospheric and geomagnetic storms are developed. Current theories of ionospheric processes and phenomena are evaluated and remaining problems of interpretation pointed out. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1965
- Accession Number
- AD0479375
Entities
People
- I. G. Poppoff
- R. C. Whitten Jr.
- R. S. Edmonds
Organizations
- SRI International