{"@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/1360005745014586752.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.5194/angeo-37-235-2019"}},{"identifier":{"@type":"URI","@value":"https://angeo.copernicus.org/articles/37/235/2019/angeo-37-235-2019.pdf"}},{"identifier":{"@type":"DOI","@value":"10.7892/boris.128605"}},{"identifier":{"@type":"DOI","@value":"10.7892/boris.130596"}}],"resourceType":"学術雑誌論文(journal article)","dc:title":[{"@value":"Global sounding of F region irregularities by COSMIC during a geomagnetic storm"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Abstract. We analyse reprocessed electron density profiles and total\nelectron content (TEC) profiles of the ionosphere in September 2008 (around\nsolar minimum) and September 2013 (around solar maximum) obtained by the\nConstellation Observing System for Meteorology, Ionosphere, and Climate\n(COSMIC/FORMOSAT-3). The TEC profiles describe the total electron content\nalong the ray path from the GPS satellite to the low Earth orbit as function\nof the tangent point of the ray. Some of the profiles in the magnetic polar\nregions show small-scale fluctuations on spatial scales <50 km. Possibly\nthe trajectory of the tangent point intersects spatial electron density\nirregularities in the magnetic polar region. For derivation of the morphology\nof the electron density and TEC fluctuations, a 50 km high-pass filter is\napplied in the s domain, where s is the distance between a reference\npoint (bottom tangent point) and the tangent point. For each profile, the\nmean of the fluctuations is calculated for tangent point altitudes between\n400 and 500 km. At first glance, the global maps of ΔNe\nand ΔTEC are quite similar. However, ΔTEC\nmight be more reliable since it is based on fewer retrieval assumptions. We\nfind a significant difference if the arithmetic mean or the median is applied\nto the global map of September 2013. In agreement with literature,\nΔTEC is enhanced during the post-sunset rise of the equatorial\nionosphere in September 2013, which is associated with spread F and\nequatorial plasma bubbles. The global map of ΔTEC at solar maximum\n(September 2013) has stronger fluctuations than those at solar minimum\n(September 2008). We obtained new results when we compare the global maps of\nthe quiet phase and the storm phase of the geomagnetic storm of 15 July 2012.\nIt is evident that the TEC fluctuations are increased and extended over the\nsouthern magnetic polar region at the day of the geomagnetic storm. The\nnorth–south asymmetry of the storm response is more pronounced in the upper\nionosphere (ray tangent points h = 400–500 km) than in the lower\nionosphere (ray tangent points h = 200–300 km).</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380005745014586880","@type":"Researcher","foaf:name":[{"@value":"Klemens Hocke"}]},{"@id":"https://cir.nii.ac.jp/crid/1420001326224168320","@type":"Researcher","personIdentifier":[{"@type":"KAKEN_RESEARCHERS","@value":"70589639"},{"@type":"NRID","@value":"1000070589639"},{"@type":"NRID","@value":"9000023031296"},{"@type":"NRID","@value":"9000016883864"},{"@type":"NRID","@value":"9000265539303"},{"@type":"NRID","@value":"9000024362611"},{"@type":"NRID","@value":"9000016907804"},{"@type":"NRID","@value":"9000024359744"},{"@type":"NRID","@value":"9000337100867"},{"@type":"NRID","@value":"9000404333926"},{"@type":"NRID","@value":"9000025009983"},{"@type":"NRID","@value":"9000288831597"},{"@type":"NRID","@value":"9000242385414"},{"@type":"RESEARCHMAP","@value":"https://researchmap.jp/huixin"}],"foaf:name":[{"@value":"Huixin Liu"}]},{"@id":"https://cir.nii.ac.jp/crid/1380005745014586752","@type":"Researcher","foaf:name":[{"@value":"Nicholas Pedatella"}]},{"@id":"https://cir.nii.ac.jp/crid/1380005745014586881","@type":"Researcher","foaf:name":[{"@value":"Guanyi Ma"}]}],"publication":{"publicationIdentifier":[{"@type":"EISSN","@value":"14320576"}],"prism:publicationName":[{"@value":"Annales Geophysicae"}],"dc:publisher":[{"@value":"Copernicus GmbH"}],"prism:publicationDate":"2019-04-16","prism:volume":"37","prism:number":"2","prism:startingPage":"235","prism:endingPage":"242"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["https://creativecommons.org/licenses/by/4.0/"],"url":[{"@id":"https://angeo.copernicus.org/articles/37/235/2019/angeo-37-235-2019.pdf"}],"createdAt":"2019-04-16","modifiedAt":"2025-02-01","foaf:topic":[{"@id":"https://cir.nii.ac.jp/all?q=QC801-809","dc:title":"QC801-809"},{"@id":"https://cir.nii.ac.jp/all?q=Science","dc:title":"Science"},{"@id":"https://cir.nii.ac.jp/all?q=Physics","dc:title":"Physics"},{"@id":"https://cir.nii.ac.jp/all?q=QC1-999","dc:title":"QC1-999"},{"@id":"https://cir.nii.ac.jp/all?q=Q","dc:title":"Q"},{"@id":"https://cir.nii.ac.jp/all?q=Geophysics.%20Cosmic%20physics","dc:title":"Geophysics. Cosmic physics"},{"@id":"https://cir.nii.ac.jp/all?q=620%20Engineering","dc:title":"620 Engineering"}],"project":[{"@id":"https://cir.nii.ac.jp/crid/1040282256801950080","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"15H02135"},{"@type":"JGN","@value":"JP15H02135"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H02135/"}],"notation":[{"@language":"ja","@value":"新・衛星＝地上ビーコン観測と赤道大気レーダーによる低緯度電離圏の時空間変動の解明"},{"@language":"en","@value":"Study of spatio-temporal fluctuation of low latitude ionosphere by using new satellite-ground beacon observation and Equatorial Atmospheric Radar"}]},{"@id":"https://cir.nii.ac.jp/crid/1040282256952482176","@type":"Project","projectIdentifier":[{"@type":"KAKEN","@value":"17KK0095"},{"@type":"JGN","@value":"JP17KK0095"},{"@type":"URI","@value":"https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17KK0095/"}],"notation":[{"@language":"ja","@value":"エルニーニョ気候変動がもたらす大気潮汐波動変化の解明"},{"@language":"en","@value":"Atmospheric tidal variabilities during ENSO"}]}],"relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360011143660754816","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Monitoring the ionospheric storm effect with multiple instruments in North China: July 15–16, 2012 magnetic storm event"}]},{"@id":"https://cir.nii.ac.jp/crid/1360022307172470912","@type":"Article","resourceType":"preprint","relationType":["hasPreprint"],"jpcoar:relatedTitle":[{"@value":"Global sounding of\n                  <i>F</i>\n                  region irregularities by COSMIC during a geomagnetic storm"}]},{"@id":"https://cir.nii.ac.jp/crid/1360292618562520320","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"A technical description of atmospheric sounding by GPS occultation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574093934154624","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Sporadic <i>E</i> morphology from GPS‐CHAMP radio occultation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360574095479412736","@type":"Article","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Time evolution and dynamics of equatorial backscatter plumes 1. 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