{"@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/1361418520193128448.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1109/tgrs.2011.2171349"}},{"identifier":{"@type":"URI","@value":"http://xplorestaging.ieee.org/ielx5/36/6200913/06082437.pdf?arnumber=6082437"}}],"dc:title":[{"@value":"Synthetic Aperture Radar Processing of Kaguya Lunar Radar Sounder Data for Lunar Subsurface Imaging"}],"description":[{"notation":[{"@value":"Synthetic aperture radar (SAR) processing was applied to the observation data of Lunar Radar Sounder (LRS), which is an HF sounder which was installed onboard a Japanese lunar exploration orbiter, Kaguya, for the purpose of imaging lunar subsurface structure. A two-media model was introduced to the LRS SAR algorithm to define the reference function of the LRS SAR processing. The LRS SAR algorithm has two free parameters, i.e., dielectric constant of the subsurface medium and synthetic aperture. The effect of these free parameters on LRS SAR imaging was studied by simulation and was verified by actual LRS observation data. A practical guideline for LRS SAR processing was drawn. The dielectric constant of the subsurface medium may be ignored in practice so far as the synthetic aperture is smaller than 10 km. For a larger synthetic aperture case, assumption of a moderate dielectric constant (e = 6 ~ 8) of the subsurface medium is effective in realizing good focusing of deep targets. Finally, taking full advantage of ground processing, advanced processing was attempted. Off-nadir focusing SAR processing proved to be effective in imaging oblique objects whose dominant scattering angle was not the angle toward zenith. Changing the dielectric constant of the two-media model proved to be effective in focusing/defocusing small objects, thus enabling us to localize the object's position as surface or subsurface."}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1381418520193128448","@type":"Researcher","foaf:name":[{"@value":"Takao Kobayashi"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128451","@type":"Researcher","foaf:name":[{"@value":"Jung-Ho Kim"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128449","@type":"Researcher","foaf:name":[{"@value":"Seung Ryeol Lee"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128324","@type":"Researcher","foaf:name":[{"@value":"Atsushi Kumamoto"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128321","@type":"Researcher","foaf:name":[{"@value":"Hiromu Nakagawa"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128450","@type":"Researcher","foaf:name":[{"@value":"Shoko Oshigami"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128452","@type":"Researcher","foaf:name":[{"@value":"Hiroshi Oya"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128320","@type":"Researcher","foaf:name":[{"@value":"Yasushi Yamaguchi"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128323","@type":"Researcher","foaf:name":[{"@value":"Atsushi Yamaji"}]},{"@id":"https://cir.nii.ac.jp/crid/1381418520193128322","@type":"Researcher","foaf:name":[{"@value":"Takayuki Ono"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01962892"},{"@type":"EISSN","@value":"15580644"}],"prism:publicationName":[{"@value":"IEEE Transactions on Geoscience and Remote Sensing"}],"dc:publisher":[{"@value":"Institute of Electrical and Electronics Engineers (IEEE)"}],"prism:publicationDate":"2012-06","prism:volume":"50","prism:number":"6","prism:startingPage":"2161","prism:endingPage":"2174"},"reviewed":"false","dc:rights":["https://ieeexplore.ieee.org/Xplorehelp/downloads/license-information/IEEE.html"],"url":[{"@id":"http://xplorestaging.ieee.org/ielx5/36/6200913/06082437.pdf?arnumber=6082437"}],"createdAt":"2011-11-17","modifiedAt":"2021-10-10","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1360004229801309056","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Mare volcanism: Reinterpretation based on Kaguya Lunar Radar Sounder data"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004232184363264","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Constraint on subsurface structures beneath Reiner Gamma on the Moon using the Kaguya Lunar Radar Sounder"}]},{"@id":"https://cir.nii.ac.jp/crid/1360848654738080256","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Detection of Intact Lava Tubes at Marius Hills on the Moon by SELENE (Kaguya) Lunar Radar Sounder"}]},{"@id":"https://cir.nii.ac.jp/crid/1361975843212930560","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Volcanic history in the Smythii basin based on SELENE radar observation"}]},{"@id":"https://cir.nii.ac.jp/crid/2051433317028462208","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Estimation of bulk permittivity of the Moon’s surface using Lunar Radar Sounder on-board Selenological and Engineering Explorer"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1109/tgrs.2011.2171349"},{"@type":"OPENAIRE","@value":"doi_dedup___::de2c33966ce71734328c0b81e9c4b754"},{"@type":"CROSSREF","@value":"10.1002/2013je004568_references_DOI_Id9ulb9cSoke0IMH40RNQwMJQ2W"},{"@type":"CROSSREF","@value":"10.1016/j.icarus.2015.03.020_references_DOI_Id9ulb9cSoke0IMH40RNQwMJQ2W"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01259-2_references_DOI_Id9ulb9cSoke0IMH40RNQwMJQ2W"},{"@type":"CROSSREF","@value":"10.1002/2017gl074998_references_DOI_Id9ulb9cSoke0IMH40RNQwMJQ2W"},{"@type":"CROSSREF","@value":"10.1038/s41598-019-50296-9_references_DOI_Id9ulb9cSoke0IMH40RNQwMJQ2W"}]}