Download or read book Combination Frequency and VLF-ELF Generations Through High-Power HF Heating of D-Region Ionosphere written by A. J. Ferraro and published by . This book was released on 1979 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the outcome of a preliminary study of non-linearities in the D-region ionosphere by heating the region with high power HF radio waves. Ultimate objective of the study was in determining the impact of the non-linear effects on radio communications, especially under highly disturbed ionosphereic conditions. Experimental work of 'Initial Phase' investigation dealt with the measurement of combination frequencies generated by the high power heating wave and a low power probing wave. Preliminary results of the measurement are presented. In addition to the experimental work, a theoretical feasibility study of the so-called wireless radiation system was made to determine its applicabilitiy to ELF and ULF radio communications. This radiation system is brought about by modulating the ionospheric current system using high-power HF heater. Numerical results of predicted radiated powers are also presented in this report. (Author).