STUDIES OF IONOSPHERIC ABSORPTION OF RADIO WAVES BY THE COSMIC NOISE METHOD
Abstract
The theory of measurements of nondeviative absorption of radio waves is reviewed. It is pointed out that the discrepancy between classical magnetoionic theory and generalized theory, in which the energy dependence of the electron collision frequency is taken into account, isAPPRECIABLE IN MOST OF THE LOWER IONOSPHERE. It is also shown that the use of the generalized theory does not involve more work at the ordinary riometer frequencies than does the magnetoionic theory. The results of riometer measurements of quiet day absorption, sudden cosmic noise absorption, absorption associated with aurora and geomagnetic disturbances, and of polar cap absorption are reviewed. Special emphasis is placed in the last part of the paper on the problem of the variation of cosmic noise absorption in the twilight periods and the interpretation of the observations relevant to it. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 15, 1962
- Accession Number
- AD0287858
Entities
People
- Bengt Hultqvist
Organizations
- Air Force Cambridge Research Laboratories