{"@context":{"@vocab":"https://cir.nii.ac.jp/schema/1.0/","rdfs":"http://www.w3.org/2000/01/rdf-schema#","dc":"http://purl.org/dc/elements/1.1/","dcterms":"http://purl.org/dc/terms/","foaf":"http://xmlns.com/foaf/0.1/","prism":"http://prismstandard.org/namespaces/basic/2.0/","cinii":"http://ci.nii.ac.jp/ns/1.0/","datacite":"https://schema.datacite.org/meta/kernel-4/","ndl":"http://ndl.go.jp/dcndl/terms/","jpcoar":"https://github.com/JPCOAR/schema/blob/master/2.0/"},"@id":"https://cir.nii.ac.jp/crid/1363670320109033472.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5194/angeo-19-205-2001"}},{"identifier":{"@type":"URI","@value":"https://angeo.copernicus.org/articles/19/205/2001/angeo-19-205-2001.pdf"}},{"identifier":{"@type":"HANDLE","@value":"2381/36581"}}],"dc:title":[{"@value":"On the altitude dependence of the spectral characteristics of decametre-wavelength E region backscatter and the relationship with optical auroral forms"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Abstract. Observations of E region backscatter by the Ice-land East SuperDARN HF radar from the 30 minute period 2330 to 2400 UT on 13 September 1999 are presented, along with simultaneous observations of auroral luminosity from two all-sky cameras. Interferometric techniques are employed to estimate the altitude of origin of each echo observed by the radar. Under investigation is a region of backscatter which is L-shell aligned and exists in a region of low auroral luminosity bounded to the north and the south by two auroral arcs. The spectral characteristics of the backscatter fall into three main populations: broad, low Doppler shift spectra; narrow, high Doppler shift spectra; and exceptionally narrow, low Doppler shift spectra. The first two populations are similar to type II and type I spectra observed with VHF radars, respectively. These populations scatter from near the peak of the E region. The high Doppler shift population appears to exist in a region of sub-critical electric field. The third population originates below the E region peak at altitudes between 80 and 100 km. We argue that a non-coherent scattering process is responsible for this backscatter.Key words. Ionosphere (auroral ionosphere; ionospheric irregularities)\n                    </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380848661784571024","@type":"Researcher","foaf:name":[{"@value":"S. E. Milan"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320109033472","@type":"Researcher","foaf:name":[{"@value":"M. Lester"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320109033475","@type":"Researcher","foaf:name":[{"@value":"N. Sato"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670320109033473","@type":"Researcher","foaf:name":[{"@value":"H. Takizawa"}]}],"contributor":[{"@id":"https://cir.nii.ac.jp/crid/1891428067834654853","@type":"Researcher","foaf:name":[{"@value":"National Institute of Polar Research [Tokyo] (NiPR)"}]},{"@id":"https://cir.nii.ac.jp/crid/1891428067834654848","@type":"Researcher","foaf:name":[{"@value":"Tohoku University [Sendai]"}]},{"@id":"https://cir.nii.ac.jp/crid/1891428067834654852","@type":"Researcher","foaf:name":[{"@value":"EGU, Publication"}]},{"@id":"https://cir.nii.ac.jp/crid/1892555065898753538","@type":"Researcher","foaf:name":[{"@value":"Department of Physics and Astronomy Leicester"}]},{"@id":"https://cir.nii.ac.jp/crid/1892555065898753539","@type":"Researcher","foaf:name":[{"@value":"University of Leicester"}]},{"@id":"https://cir.nii.ac.jp/crid/1892555065898753537","@type":"Researcher","foaf:name":[{"@value":"National Institute of Polar Research Tokyo (NiPR)"}]},{"@id":"https://cir.nii.ac.jp/crid/1892555065898753536","@type":"Researcher","foaf:name":[{"@value":"Tohoku University Sendai"}]},{"@id":"https://cir.nii.ac.jp/crid/1891428067834654851","@type":"Researcher","foaf:name":[{"@value":"Department of Physics and Astronomy [Leicester] ; University of Leicester"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"14320576"}],"prism:publicationName":[{"@value":"Annales Geophysicae"}],"dc:publisher":[{"@value":"Copernicus GmbH"}],"prism:publicationDate":"2001-02-28","prism:volume":"19","prism:number":"2","prism:startingPage":"205","prism:endingPage":"217"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/3.0/"],"url":[{"@id":"https://angeo.copernicus.org/articles/19/205/2001/angeo-19-205-2001.pdf"}],"createdAt":"2010-06-15","modifiedAt":"2021-01-27","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=Science","dc:title":"Science"},{"@id":"https://cir.nii.ac.jp/all?q=QC1-999","dc:title":"QC1-999"},{"@id":"https://cir.nii.ac.jp/all?q=Geophysics.%20Cosmic%20physics","dc:title":"Geophysics. Cosmic physics"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.STU%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Earth%20Sciences","dc:title":"[SDU.STU]Sciences of the Universe [physics]/Earth Sciences"},{"@id":"https://cir.nii.ac.jp/all?q=ionosphere","dc:title":"ionosphere"},{"@id":"https://cir.nii.ac.jp/all?q=Astronomy%20%26%20Astrophysics","dc:title":"Astronomy & Astrophysics"},{"@id":"https://cir.nii.ac.jp/all?q=Meteorology%20%26%20Atmospheric%20Sciences","dc:title":"Meteorology & Atmospheric Sciences"},{"@id":"https://cir.nii.ac.jp/all?q=ionospheric%20irregularities","dc:title":"ionospheric irregularities"},{"@id":"https://cir.nii.ac.jp/all?q=DOPPLER%20SPECTRA","dc:title":"DOPPLER SPECTRA"},{"@id":"https://cir.nii.ac.jp/all?q=ELECTROJET","dc:title":"ELECTROJET"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.OCEAN%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Ocean,%20Atmosphere","dc:title":"[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.OCEAN%5DSciences%20of%20the%20Universe%20%5Bphysics%5D/Ocean","dc:title":"[SDU.OCEAN]Sciences of the Universe [physics]/Ocean"},{"@id":"https://cir.nii.ac.jp/all?q=Science%20%26%20Technology","dc:title":"Science & Technology"},{"@id":"https://cir.nii.ac.jp/all?q=Multidisciplinary","dc:title":"Multidisciplinary"},{"@id":"https://cir.nii.ac.jp/all?q=Atmosphere","dc:title":"Atmosphere"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.OCEAN%5D%20Sciences%20of%20the%20Universe%20%5Bphysics%5D/Ocean,%20Atmosphere","dc:title":"[SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere"},{"@id":"https://cir.nii.ac.jp/all?q=QC801-809","dc:title":"QC801-809"},{"@id":"https://cir.nii.ac.jp/all?q=Physics","dc:title":"Physics"},{"@id":"https://cir.nii.ac.jp/all?q=Q","dc:title":"Q"},{"@id":"https://cir.nii.ac.jp/all?q=Geology","dc:title":"Geology"},{"@id":"https://cir.nii.ac.jp/all?q=CUTLASS","dc:title":"CUTLASS"},{"@id":"https://cir.nii.ac.jp/all?q=520","dc:title":"520"},{"@id":"https://cir.nii.ac.jp/all?q=IRREGULARITIES","dc:title":"IRREGULARITIES"},{"@id":"https://cir.nii.ac.jp/all?q=Physical%20Sciences","dc:title":"Physical Sciences"},{"@id":"https://cir.nii.ac.jp/all?q=auroral%20ionosphere","dc:title":"auroral ionosphere"},{"@id":"https://cir.nii.ac.jp/all?q=%5BSDU.STU%5D%20Sciences%20of%20the%20Universe%20%5Bphysics%5D/Earth%20Sciences","dc:title":"[SDU.STU] Sciences of the Universe [physics]/Earth Sciences"},{"@id":"https://cir.nii.ac.jp/all?q=HF%20RADAR","dc:title":"HF RADAR"},{"@id":"https://cir.nii.ac.jp/all?q=LATITUDE%20E-REGION","dc:title":"LATITUDE E-REGION"},{"@id":"https://cir.nii.ac.jp/all?q=Geosciences","dc:title":"Geosciences"}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/2051151842044692096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Review of the accomplishments of midlatitude Super Dual Auroral Radar Network (SuperDARN) HF radars"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.5194/angeo-19-205-2001"},{"@type":"OPENAIRE","@value":"doi_dedup___::76e1cbb59ad89d872e76eec1c939db9b"},{"@type":"CROSSREF","@value":"10.1186/s40645-019-0270-5_references_DOI_DxFzvpXBbI3bOpwZOLgsgwMwVlc"}]}