Semidiurnal tidal signature in sporadic E occurrence rates derived from GPS radio occultation measurements at higher midlatitudes

Semidiurnal tidal signature in sporadic E occurrence rates derived from GPS radio occultation measurements at higher midlatitudes

GPS (Global Positioning System) Radio occultation (RO) measurements from CHAMP, GRACE and FORMOSAT-3/COSMIC satellites at Northern Hemisphere midlatitides (50°–55° N) are analysed to obtain the diurnal variation of sporadic E layer occurrence frequency in 2006 and 2007. Interconne...

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Bibliographic Details
Main Authors: C. Arras, C. Jacobi, J. Wickert
Format: Article
Language:English
Published: Copernicus Publications 2009-06-01
Series:Annales Geophysicae
Online Access:https://www.ann-geophys.net/27/2555/2009/angeo-27-2555-2009.pdf
Description
Summary:GPS (Global Positioning System) Radio occultation (RO) measurements from CHAMP, GRACE and FORMOSAT-3/COSMIC satellites at Northern Hemisphere midlatitides (50&deg;–55&deg; N) are analysed to obtain the diurnal variation of sporadic E layer occurrence frequency in 2006 and 2007. Interconnections with zonal wind shears measured by meteor radar at Collm (51.3&deg; N, 13&deg; E), Germany, are investigated. According to theory, maximum <I>E<sub>s</sub></I> occurrence is expected when the zonal wind shear, which is mainly produced by the semidiurnal tide in midlatitudes, is negative. This is confirmed by the present measurements and analysis.
ISSN:0992-7689
1432-0576

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