{"@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/1363951795766514432.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.23919/ursiap-rasc.2019.8738382"}},{"identifier":{"@type":"URI","@value":"http://xplorestaging.ieee.org/ielx7/8732972/8738126/08738382.pdf?arnumber=8738382"}}],"dc:title":[{"@value":"Real-time 3-D Ionospheric Tomography and Its Validation by the MU Radar"}],"description":[{"notation":[{"@value":"Ionospheric tomography is a technique to reconstruct ionospheric density profiles from various measurements. We have developed a real-time 3-D ionospheric tomography system over Japan by using total electron contents (TECs) derived from dual-frequency Global Navigation Satellite System (GNSS) signals measured by 200 receivers of GEONET over Japan [1]. The algorithm of the tomography is a constrained least-squares [2, 3]. The real-time 3-D tomography system has been running since March 2016 and produces 3-D ionospheric density profiles over Japan every 15 minutes with a latency of 6 minutes."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383951795766514307","@type":"Researcher","foaf:name":[{"@value":"S. Saito"}]},{"@id":"https://cir.nii.ac.jp/crid/1383951795766514306","@type":"Researcher","foaf:name":[{"@value":"M. Yamamoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1383951795766514305","@type":"Researcher","foaf:name":[{"@value":"A. Saito"}]},{"@id":"https://cir.nii.ac.jp/crid/1383951795766514304","@type":"Researcher","foaf:name":[{"@value":"C.-H. Chen"}]}],"publication":{"prism:publicationName":[{"@value":"2019 URSI Asia-Pacific Radio Science Conference (AP-RASC)"}],"dc:publisher":[{"@value":"IEEE"}],"prism:publicationDate":"2019-03","prism:startingPage":"1","prism:endingPage":"1"},"reviewed":"false","url":[{"@id":"http://xplorestaging.ieee.org/ielx7/8732972/8738126/08738382.pdf?arnumber=8738382"}],"createdAt":"2019-06-21","modifiedAt":"2019-06-22","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050291768617207296","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Assessing the performance of a Northeast Asia Japan-centered 3-D ionosphere specification technique during the 2015 St. Patrick’s day geomagnetic storm"}]},{"@id":"https://cir.nii.ac.jp/crid/1050293401217315200","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Complementing regional ground GNSS-STEC computerized ionospheric tomography (CIT) with ionosonde data assimilation"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.23919/ursiap-rasc.2019.8738382"},{"@type":"OPENAIRE","@value":"doi_dedup___::de85075379d492394152f96711c801ff"},{"@type":"CROSSREF","@value":"10.1007/s10291-021-01133-y_references_DOI_ZrKJBjKvlT5QHVAkeHBEFymzIlw"},{"@type":"CROSSREF","@value":"10.1186/s40623-021-01447-8_references_DOI_ZrKJBjKvlT5QHVAkeHBEFymzIlw"}]}