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

C. Arras, C. Jacobi, J. Wickert

doi:10.5194/angeo-27-2555-2009

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

DOI PDF 被引用文献7件

書誌事項

公開日: 2009-06-24

権利情報

https://creativecommons.org/licenses/by/3.0/

DOI

10.5194/angeo-27-2555-2009

公開者: Copernicus GmbH

説明

<jats:p>Abstract. 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. Interconnections with zonal wind shears measured by meteor radar at Collm (51.3° N, 13° E), Germany, are investigated. According to theory, maximum Es 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. </jats:p>