Backscatter echoes from field-aligned irregularities in the F region
1965; American Geophysical Union; Volume: 70; Issue: 21 Linguagem: Inglês
10.1029/jz070i021p05425
ISSN2156-2202
Autores Tópico(s)Earthquake Detection and Analysis
ResumoJournal of Geophysical Research (1896-1977)Volume 70, Issue 21 p. 5425-5432 Backscatter echoes from field-aligned irregularities in the F region Paul F. Weaver, Paul F. WeaverSearch for more papers by this author Paul F. Weaver, Paul F. WeaverSearch for more papers by this author First published: 1 November 1965 https://doi.org/10.1029/JZ070i021p05425Citations: 16AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Abstract Long-range, fast-fade radar echoes at 14 Mc/s observed looking north from Ithaca, N.Y., are described. They are explained in terms of backscatter from field-aligned irregularities located in a region where straight ray paths come within 10° of perpendicularity to the earth's magnetic field. A typical echo was spread in range from about 1000 to 2000 km, had a fading rate comparable to auroral fading at the same frequency, and seemed to correlate on an hour-by-hour basis with the occurrence of spread F. The minimum echo range was observed to be dependent on the penetration frequency of the F layer. This would not be predicted by geometry with straight ray paths, whereas bending of the ray paths into strict perpendicularity as a result of refractive effects does account for the observed echoes. Citing Literature Volume70, Issue211 November 1965Pages 5425-5432 RelatedInformation
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