{"@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/1363670319679368576.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1007/s42452-019-0699-6"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/content/pdf/10.1007/s42452-019-0699-6.pdf"}},{"identifier":{"@type":"URI","@value":"http://link.springer.com/article/10.1007/s42452-019-0699-6/fulltext.html"}}],"dc:title":[{"@value":"Gradient field of undersea sound speed structure extracted from the GNSS-A oceanography: GNSS-A as a sensor for detecting sound speed gradient"}],"description":[{"notation":[{"@value":"The Global Navigation Satellite System-Acoustic ranging combination technique (GNSS-A) is a key observation method for detecting geodetic events such as co- and postseismic effects following a megathrust earthquake and the distributions of slip-deficit rate along the subduction zone. For capturing detailed slip and slip-deficit event information, Yokota et al. (Mar Geophys Res, 2018.                 https://doi.org/10.1007/s11001-018-9362-7                               ) improved the accuracy of GNSS-A seafloor positioning using a method for extracting the gradient field of an undersea sound speed structure (SSS). In this paper, we examined how the extracted gradient parameters reflect a real ocean field. A comparison with the JCOPE2, a data assimilated ocean circulation model, shows that the extracted gradient parameters reflect the structure generated by a strong ocean current and can also be used for determination of the location and horizontal structure of the Kuroshio flow path. The results are also consistent with direct SSS observations. GNSS-A can thus serve as a sensor for detecting undersea sound speed gradient fields rather than surface condition."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383670319679368576","@type":"Researcher","foaf:name":[{"@value":"Yusuke Yokota"}]},{"@id":"https://cir.nii.ac.jp/crid/1383670319679368577","@type":"Researcher","foaf:name":[{"@value":"Tadashi Ishikawa"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"25233963"},{"@type":"EISSN","@value":"25233971"}],"prism:publicationName":[{"@value":"SN Applied Sciences"}],"dc:publisher":[{"@value":"Springer Science and Business Media LLC"}],"prism:publicationDate":"2019-06-10","prism:volume":"1","prism:number":"7","prism:startingPage":"693"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://www.springer.com/tdm","http://www.springer.com/tdm"],"url":[{"@id":"http://link.springer.com/content/pdf/10.1007/s42452-019-0699-6.pdf"},{"@id":"http://link.springer.com/article/10.1007/s42452-019-0699-6/fulltext.html"}],"createdAt":"2019-06-10","modifiedAt":"2022-09-20","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360302865723788672","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Representation and interpretation about underwater sound speed gradient field in the GNSS-A observation"}]},{"@id":"https://cir.nii.ac.jp/crid/1360572092882858240","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Kilometer-Scale Sound Speed Structure That Affects GNSS-A Observation: Case Study off the Kii Channel"}]},{"@id":"https://cir.nii.ac.jp/crid/1360580230583896832","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Temporal Change of km‐Scale Underwater Sound Speed Structure and GNSS‐A Positioning Accuracy"}]},{"@id":"https://cir.nii.ac.jp/crid/1360853567859575168","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"GARPOS: Analysis Software for the GNSS‐A Seafloor Positioning With Simultaneous Estimation of Sound Speed Structure"}]},{"@id":"https://cir.nii.ac.jp/crid/1880302168347851392","@type":"Dataset","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Original data of seafloor crustal deformation along the subduction zones around Japanese Islands"}]},{"@id":"https://cir.nii.ac.jp/crid/1882835442308792448","@type":"Dataset","relationType":["references"],"jpcoar:relatedTitle":[{"@value":"Acoustic Ray Tracing Comparisons in the Context of Geodetic Precise off-shore Positioning Experiments"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942143165952","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Estimation of temporal and spatial variation of sound speed in ocean from GNSS-A measurements for observation using moored buoy"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367083669504","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Crustal deformation detection capability of the GNSS-A seafloor geodetic observation array (SGO-A), provided by Japan Coast Guard"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1007/s42452-019-0699-6"},{"@type":"OPENAIRE","@value":"doi_dedup___::ed154bc3b2c0b376271fe811292bc25b"},{"@type":"CROSSREF","@value":"10.1186/s40645-020-00331-5_references_DOI_ZDB2tGvtrJOZ7k34KYlpopVqJEi"},{"@type":"CROSSREF","@value":"10.1093/gji/ggae083_references_DOI_ZDB2tGvtrJOZ7k34KYlpopVqJEi"},{"@type":"CROSSREF","@value":"10.3389/feart.2020.00331_references_DOI_ZDB2tGvtrJOZ7k34KYlpopVqJEi"},{"@type":"CROSSREF","@value":"10.1029/2022ea002224_references_DOI_ZDB2tGvtrJOZ7k34KYlpopVqJEi"},{"@type":"CROSSREF","@value":"10.1186/s40645-021-00453-4_references_DOI_ZDB2tGvtrJOZ7k34KYlpopVqJEi"},{"@type":"CROSSREF","@value":"10.3389/feart.2020.597532_references_DOI_ZDB2tGvtrJOZ7k34KYlpopVqJEi"}]}