{"@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/1362262943694578432.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2004gl019994"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2004GL019994"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2004GL019994"}}],"dc:title":[{"@value":"The Eddy Experiment: Accurate GNSS‐R ocean altimetry from low altitude aircraft"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>During the Eddy Experiment, two synchronous GPS receivers were flown at 1 km altitude to collect L1 signals and their reflections from the sea surface for assessment of altimetric precision and accuracy. Wind speed (U10) was around 10 m/s, and SWH up to 2 m. A geophysical parametric waveform model was used for retracking and estimation of the lapse between the direct and reflected signals with a 1‐second precision of 3 m. The lapse was used to estimate the SSH along the track using a differential model. The RMS error of the 20 km averaged GNSS‐R absolute altimetric solution with respect to Jason‐1 SSH and a GPS buoy measurement was of 10 cm, with a 2 cm mean difference. Multipath and retracking parameter sensitivity due to the low altitude are suspected to have degraded accuracy. This result provides an important milestone on the road to a GNSS‐R mesoscale altimetry space mission.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380286996886145029","@type":"Researcher","foaf:name":[{"@value":"G. Ruffini"}],"jpcoar:affiliationName":[{"@value":"Starlab  Barcelona Spain"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943694578432","@type":"Researcher","foaf:name":[{"@value":"F. Soulat"}],"jpcoar:affiliationName":[{"@value":"Starlab  Barcelona Spain"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943694578436","@type":"Researcher","foaf:name":[{"@value":"M. Caparrini"}],"jpcoar:affiliationName":[{"@value":"Starlab  Barcelona Spain"}]},{"@id":"https://cir.nii.ac.jp/crid/1382262943694578433","@type":"Researcher","foaf:name":[{"@value":"O. Germain"}],"jpcoar:affiliationName":[{"@value":"Starlab  Barcelona Spain"}]},{"@id":"https://cir.nii.ac.jp/crid/1380016869917540992","@type":"Researcher","foaf:name":[{"@value":"M. Martín‐Neira"}],"jpcoar:affiliationName":[{"@value":"European Space Research and Technology Centre European Space Agency  Noordwijk Netherlands"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"00948276"},{"@type":"EISSN","@value":"19448007"}],"prism:publicationName":[{"@value":"Geophysical Research Letters"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2004-06","prism:volume":"31","prism:number":"12","prism:startingPage":"L12306"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2004GL019994"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2004GL019994"}],"createdAt":"2004-06-17","modifiedAt":"2023-10-31","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050303395627154048","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Sea Surface Height Measurements Using UAV Altimeters with Nadir LiDAR or Low-Cost GNSS Reflectometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1050864869451181056","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Ship-borne wave gauge using GNSS interferometric reflectometry"}]},{"@id":"https://cir.nii.ac.jp/crid/1360846640743504512","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"A real-time GNSS-R system based on software-defined radio and graphics processing units"}]},{"@id":"https://cir.nii.ac.jp/crid/2050025942143150720","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Extracting clearer tsunami currents from shipborne Automatic Identification System data using ship yaw and equation of ship response"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2004gl019994"},{"@type":"CROSSREF","@value":"10.1080/21664250.2024.2342596_references_DOI_3RjCirFzHH5Xe787pueKq44Mz6h"},{"@type":"CROSSREF","@value":"10.1186/s40623-020-01165-7_references_DOI_Mnye0W52MOEXNGKcoNHxicZyOTu"},{"@type":"CROSSREF","@value":"10.1016/j.asr.2012.01.009_references_DOI_Mnye0W52MOEXNGKcoNHxicZyOTu"},{"@type":"CROSSREF","@value":"10.3390/rs16234577_references_DOI_Mnye0W52MOEXNGKcoNHxicZyOTu"}]}