Characteristics of Striation Structure and Effects on Scintillation
Final rept. 1 Oct 1974-28 Apr 1978
SCIENCE APPLICATIONS INC LA JOLLA CA
Pagination or Media Count:
The characteristics of striations that are expected to be generated following a high-altitude nuclear explosion and the scintillation effects they produce are described. The shapes and density profiles of the striations are parameterized. The connection between the statistics of signal scintillation and the parameterized structural characteristics of the striations is described through the generation of formulas by an approximate analytic treatment of the power-spectral-density PSD of single-size striations. The formulas are tested by numerical propagation calculations and found to be adequate with in the uncertainties of the striation parameters. The uncertainties in our present understanding of the application of the gradient-drift mechanism towards a precise description of the striation characteristics and their development in time are explored. A methodology for calculating the time-development phase PSD resulting from the evolving striations is introduced and a sample calculation appropriate for late-time after burst is carried out explicitly.
- Atmospheric Physics
- Radiofrequency Wave Propagation
- Radio Communications