{"@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/1361699996206918656.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/rs025i005p00771"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2FRS025i005p00771"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/RS025i005p00771"}}],"dc:title":[{"@value":"Application of computerized tomography to the investigation of ionospheric structures"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Ionospheric total electron content (TEC) measurements, obtained simultaneously at several locations, can be processed using computerized tomography (CT) algorithms to obtain two‐dimensional images of ionospheric electron density. Using TEC data, computerized ionospheric tomography (CIT) reconstructs an image of the electron density structures in a vertical slice above the receiving stations. We successfully applied this technique to realistic simulations of ionospheric density variations over 16° of latitude and a height range of 50 to 1000 km. A method for approximating the peak height and scale height of the electron density profile will be discussed as well as a reconstruction technique based on the multiplicative algebraic reconstruction technique algorithm and a back projection based initial guess. The quality of reconstructions is considered for two geometries and image resolutions. In particular, the image of a mid‐latitude trough with background horizontal density gradient and large‐scale irregular structures has been reconstructed from TEC data generated from a model based on an incoherent scatter radar observation. The CT reconstructed image was compared with the original contour map obtained by the incoherent scatter radar. Good agreement has been achieved. The CIT technique has also been applied to a modeled ionosphere to calculate the range rate corrections for a Doppler‐tracking radar.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380567007825495809","@type":"Researcher","foaf:name":[{"@value":"T. D. Raymund"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996206918660","@type":"Researcher","foaf:name":[{"@value":"J. R. Austen"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996206918656","@type":"Researcher","foaf:name":[{"@value":"S. J. Franke"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996206918661","@type":"Researcher","foaf:name":[{"@value":"C. H. Liu"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996206918658","@type":"Researcher","foaf:name":[{"@value":"J. A. Klobuchar"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699996206918657","@type":"Researcher","foaf:name":[{"@value":"J. Stalker"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00486604"},{"@type":"EISSN","@value":"1944799X"},{"@type":"PISSN","@value":"http://id.crossref.org/issn/00486604"}],"prism:publicationName":[{"@value":"Radio Science"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"1990-09","prism:volume":"25","prism:number":"5","prism:startingPage":"771","prism:endingPage":"789"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2FRS025i005p00771"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/RS025i005p00771"}],"createdAt":"2008-02-06","modifiedAt":"2023-09-22","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050291768582012032","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"High‐Resolution 3‐D Imaging of Daytime Sporadic‐E Over Japan by Using GNSS TEC and Ionosondes"}]},{"@id":"https://cir.nii.ac.jp/crid/1050845760743764480","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Three-dimensional GPS ionospheric tomography over Japan using constrained least squares"},{"@value":"Three‐dimensional GPS ionospheric tomography over Japan using constrained least squares"},{"@value":"Three-Dimensional GPS Ionospheric Tomograhy over Japan using Constrained Least Squares"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846639556791808","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Real-Time Ionosphere Monitoring by Three-Dimensional Tomography over Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001205255590912","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Ionospheric Tomography by Neural Network Collocation Method"}]},{"@id":"https://cir.nii.ac.jp/crid/1390001206508908032","@type":"Article","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"First results of auroral tomography from ALIS-Japan multi-station observations in March, 1995"}]},{"@id":"https://cir.nii.ac.jp/crid/1390282679576349824","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"ja","@value":"残差最小化学習ニューラルネットワークを用いた電離圏トモグラフィーの性能評価"},{"@language":"en","@value":"Validation of Ionospheric Tomography using Residual Minimization Training Neural Network"},{"@language":"ja-Kana","@value":"ザンサ サイショウカ ガクシュウ ニューラルネットワーク オ モチイタ デンリケン トモグラフィー ノ セイノウ ヒョウカ"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317076102784","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Medium-scale traveling ionospheric disturbances by three-dimensional ionospheric GPS tomography"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/rs025i005p00771"},{"@type":"CROSSREF","@value":"10.1186/bf03352088_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1002/ecj.11824_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1585/pfr.2.s1015_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1541/ieejfms.135.117_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1002/navi.213_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1002/2013ja019582_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1186/s40623-016-0412-6_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"},{"@type":"CROSSREF","@value":"10.1029/2021sw002878_references_DOI_P0rvuilN5lqOUZBwTDZYUSedzrJ"}]}