STUDIES IN IONOSPHERIC PROPAGATION. THE EXACT EARTH-FLATTENING PROCEDURE IN IONOSPHERIC PROPAGATION PROBLEMS. PART 1. VLF SIGNAL ENHANCEMENTS AND HF FADEOUTS DURING SUDDEN IONOSPHERIC DISTURBANCES. PART 2
Abstract
The exact earth-flattening procedure developed for an isotropic spherically-stratified atmosphere, is extended to the case of a spherical earth and atmosphere enveloped by a sharply bounded ionosphere. The general solution of the problem is formulated as an integral representation, from which may be derived either a rayoptical series or a normal mode series. In the latter case, the normal modes involve the normalized spherical Hankel function and its derivative. An improved method of obtaining the zeros of these functions is derived which is not of asymptotic character. Simultaneous observations of short-wave fade-outs of a 13.5-Mc signal and sudden signal enhancements of a 31. 15-kc signal over substantially the same transatlantic path of about 5400 km show no evident correlation between the magnitudes of the two effects of the SID. This absence of correlation is understandable on the basis of a two-layer D-region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 15, 1962
- Accession Number
- AD0277479
Entities
People
- B. C. Koo
- M. Katzin