{"@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/1362825895449283328.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5194/angeo-24-1443-2006"}},{"identifier":{"@type":"URI","@value":"https://angeo.copernicus.org/articles/24/1443/2006/angeo-24-1443-2006.pdf"}}],"dc:title":[{"@value":"Equatorial plasma bubbles in the ionosphere over Eritrea: occurrence and drift speed"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Abstract. An all-sky imager was installed in Asmara, Eritrea (15.4° N, 38.9° E, 7° N dip) and used to monitor the OI 630-nm nightglow. Nine months of data were studied between September 2001 and May 2002, a time including the recent maximum in the solar activity cycle. Equatorial plasma bubbles (EPBs) were recorded on 63% of nights with adequate viewing conditions. The station location within view of the equatorial ionization anomaly and with a magnetic declination near zero makes it an excellent test case for comparison with satellite studies of the seasonal variation of EPBs with longitude. The imager was accompanied by two Cornell GPS scintillation monitors, and the amplitude scintillation data are compared to the all-sky data. GPS scintillations indicate the beginning of EPBs, but die out sooner in the post-midnight period than the larger scale EPBs. Both phenomena exhibit clear occurrence maxima around the equinoxes. Ionospheric zonal drift speeds have been deduced from EPB and GPS scintillation pattern movement. Average near-midnight EPB drift speeds are between 100 and 120 m/s most months, with the GPS scintillation speeds being about the same. A winter drift speed maximum is evident in both EPB and GPS scintillation monthly means.\n                    </jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380853567696423942","@type":"Researcher","foaf:name":[{"@value":"R. H. Wiens"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895449283330","@type":"Researcher","foaf:name":[{"@value":"B. M. Ledvina"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895449283329","@type":"Researcher","foaf:name":[{"@value":"P. M. Kintner"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895449283328","@type":"Researcher","foaf:name":[{"@value":"M. Afewerki"}]},{"@id":"https://cir.nii.ac.jp/crid/1382825895449283332","@type":"Researcher","foaf:name":[{"@value":"Z. Mulugheta"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"14320576"}],"prism:publicationName":[{"@value":"Annales Geophysicae"}],"dc:publisher":[{"@value":"Copernicus GmbH"}],"prism:publicationDate":"2006-07-03","prism:volume":"24","prism:number":"5","prism:startingPage":"1443","prism:endingPage":"1453"},"reviewed":"false","dc:rights":["https://creativecommons.org/licenses/by/3.0/"],"url":[{"@id":"https://angeo.copernicus.org/articles/24/1443/2006/angeo-24-1443-2006.pdf"}],"createdAt":"2010-06-15","modifiedAt":"2021-01-28","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360017282440648448","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"An experimental investigation into the possible connections between the zonal neutral wind speeds and equatorial plasma bubble drift velocities over the African equatorial region"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021391857273600","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Machine learning approach for ionospheric scintillation prediction on ROTI parameter over the African region during solar cycle 24"}]},{"@id":"https://cir.nii.ac.jp/crid/1360021391858289920","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Equatorial plasma bubble intensities across longitudinal sectors of the globe using GNSS observations"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654738430080","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"First Study on the Occurrence Frequency of Equatorial Plasma Bubbles over West Africa Using an All‐Sky Airglow Imager and GNSS Receivers"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848658222084352","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Statistical Analysis of Separation Distance Between Equatorial Plasma Bubbles Near Suvarnabhumi International Airport, Thailand"}]},{"@id":"https://cir.nii.ac.jp/crid/1361975843010293632","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Equatorial Plasma Bubble Zonal Drift Velocity Variations in Response to Season, Local Time, and Solar Activity across Southeast Asia"}]},{"@id":"https://cir.nii.ac.jp/crid/2050307417119869824","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A possible case of sporadic aurora observed at Rio de Janeiro"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.5194/angeo-24-1443-2006"},{"@type":"CROSSREF","@value":"10.1016/j.jastp.2021.105663_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"},{"@type":"CROSSREF","@value":"10.1016/j.asr.2023.12.026_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"},{"@type":"CROSSREF","@value":"10.1016/j.jastp.2023.106097_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"},{"@type":"CROSSREF","@value":"10.1002/2017ja024602_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"},{"@type":"CROSSREF","@value":"10.1029/2018ja025612_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01208-z_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"},{"@type":"CROSSREF","@value":"10.1029/2019ja027521_references_DOI_XFV3FXKplRVuFpOiCYJZROqzGCi"}]}