On the relationship between aspect sensitivity, wave activity, and multiple scattering centers of mesosphere summer echoes: A case study using coherent radar imaging

dc.bibliographicCitation.firstPage807
dc.bibliographicCitation.issue3eng
dc.bibliographicCitation.lastPage817
dc.bibliographicCitation.volume22
dc.contributor.authorChen, J.-S.
dc.contributor.authorHoffmann, P.
dc.contributor.authorZecha, M.
dc.contributor.authorRöttger, J.
dc.date.accessioned2018-03-09T10:43:59Z
dc.date.available2019-06-28T12:38:32Z
dc.date.issued2004
dc.description.abstractA mesosphere-summer-echo layer, observed by the OSWIN VHF radar (54.1°N, 11.8°E) with vertical and 7° oblique radar beams, was examined using the method of coherent radar imaging (CRI). We disclosed the echo events having multiple scattering centers (MSC) in the radar volume by means of the high angular resolution of the CRI technique and found that the MSC events occurred more frequently in the upper portion of the echo layer. More examinations showed that the characteristics were different between the upper and lower portions of the layer. For example, the differences in echo power between vertical and oblique beams changed mostly from positive to negative along the increase of altitude, and strong turbulent echoes were seen in the upper portion of the layer. These observations indicate that the aspect sensitivity of the echoes became less and less with the increase of altitude. Moreover, the scattering centers of the echoes were close to zenith for the lower portion of the layer but were usually several degrees from the zenith for the upper portion of the layer. Observable wave-like variation in the scattering center was also seen in the upper part of the layer. Based on these features, we drew some conclusions for this case study: (a) the MSC events might result from the slanted layer/anisotropic structure tilted by short-wave activities, (b) the tilt angle of the layer structure could be 6°–10°, causing the echo power received by the 7° oblique beam was larger than or comparable to that received by the vertical beam, and (c) short-wave activities not only tilted the layer structure, but also induced isotropic irregularities.eng
dc.description.versionpublishedVersioneng
dc.formatapplication/pdf
dc.identifier.urihttps://doi.org/10.34657/1612
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/4071
dc.language.isoengeng
dc.publisherMünchen : European Geopyhsical Unioneng
dc.relation.doihttps://doi.org/10.5194/angeo-22-807-2004
dc.relation.ispartofseriesAnnales Geophysicae, Volume 22, Issue 3, Page 807-817eng
dc.rights.licenseCC BY 3.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/eng
dc.subjectMeteorology and atmospheric dynamics (middle atmosphere dynamics). Radio science (interferometryeng
dc.subjectinstruments and techniques)eng
dc.subject.ddc530eng
dc.titleOn the relationship between aspect sensitivity, wave activity, and multiple scattering centers of mesosphere summer echoes: A case study using coherent radar imagingeng
dc.typearticleeng
dc.typeTexteng
dcterms.bibliographicCitation.journalTitleAnnales Geophysicaeeng
tib.accessRightsopenAccesseng
wgl.contributorIAPeng
wgl.subjectPhysikeng
wgl.subjectGeowissenschafteneng
wgl.typeZeitschriftenartikeleng
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