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| Titel |
ULF wave effects on high frequency signal propagation through the ionosphere |
| VerfasserIn |
C. L. Waters, S. P. Cox |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 27, no. 7 ; Nr. 27, no. 7 (2009-07-14), S.2779-2788 |
| Datensatznummer |
250016588
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| Publikation (Nr.) |
 copernicus.org/angeo-27-2779-2009.pdf |
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| Zusammenfassung |
| Variations in the total electron content (TEC) of the ionosphere alter the
propagation characteristics of EM radiation for frequencies above a few
megahertz (MHz). Spatial and temporal variations of the ionosphere TEC
influence highly sensitive, ground based spatial measurements such as those
used in radio astronomy and Global Positioning System (GPS) applications. In
this paper we estimate the magnitudes of the changes in TEC and the time
delays of high frequency signals introduced by variations in the ionosphere
electron density caused by the natural spectrum of ultra-low frequency (ULF)
wave activity that originates in near-Earth space. The time delays and
associated phase shifts depend on the frequency, spatial structure and
amplitude of the ULF waves. |
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