{"@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/1361699995069865088.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1002/2012ja018585"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2012JA018585"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2012JA018585"}}],"dc:title":[{"@value":"Pi2 pulsation simultaneously observed in the <i>E</i> and <i>F</i> region ionosphere with the SuperDARN Hokkaido radar"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:title>Abstract</jats:title><jats:p>We investigated Pi2 pulsations in the nightside ionosphere that began at 14:15 UT (2315 LT) on 11 July 2010, and they were observed with high‐temporal (8 s) resolution by beam 4 of the Super Dual Auroral Radar Network (SuperDARN) Hokkaido radar. These pulsations were simultaneously observed in both the ground/sea scatter echoes reflected from the <jats:italic>F</jats:italic> region height and in ionospheric echoes from field‐aligned irregularities in the sporadic <jats:italic>E<jats:sub>s</jats:sub></jats:italic> region. They had the same period of 110 s and approximately no phase lag. From the radar observations and the International Geomagnetic Reference Field model, the amplitude of the eastward (<jats:italic>E</jats:italic><jats:sub>EW</jats:sub>) component of the electric field of the Pi2 pulsations in the ionosphere was estimated ~8.0 mV/m in the <jats:italic>F</jats:italic> region and ~2.0 mV/m in the <jats:italic>E</jats:italic> region. Corresponding Pi2 pulsations appeared dominantly in the horizontal northward magnetic field component (<jats:italic>H</jats:italic>) at nearby ground stations, Moshiri (MSR), St. Paratunka (PTK), and Stecolny (STC), with amplitudes ranging from 6 nT (MSR) to 10 nT (STC). At the dominant frequency of 8.8 mHz, the coherences between <jats:italic>H</jats:italic> and <jats:italic>E</jats:italic><jats:sub>EW</jats:sub> were high (>0.9), the cross phases of <jats:italic>E</jats:italic><jats:sub>EW</jats:sub> relative to <jats:italic>H</jats:italic> were −56° and −45°, and the amplitude ratios were 2.7 × 10<jats:sup>5</jats:sup> m/s and 8.4 × 10<jats:sup>5</jats:sup> m/s, in the <jats:italic>E</jats:italic> and <jats:italic>F</jats:italic> regions, respectively. Based on a comparison of these results with theoretical predictions, we suggest that the concept of a pure cavity mode is not sufficient to explain the combined observations for midlatitude Pi2 waves and that the contribution of an Alfvén waves must be taken in account.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1380848661784570898","@type":"Researcher","foaf:name":[{"@value":"M. Teramoto"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Nagoya Japan"},{"@value":"Now at Institute of Space and Astronautical Science Japan Aerospace Exploration Agency  Sagamihara Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069865092","@type":"Researcher","foaf:name":[{"@value":"N. Nishitani"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069865094","@type":"Researcher","foaf:name":[{"@value":"V. Pilipenko"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Nagoya Japan"},{"@value":"Space Research Institute  Moscow Russia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069865093","@type":"Researcher","foaf:name":[{"@value":"T. Ogawa"}],"jpcoar:affiliationName":[{"@value":"National Institute of Information and Communications Technology  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069864961","@type":"Researcher","foaf:name":[{"@value":"K. Shiokawa"}],"jpcoar:affiliationName":[{"@value":"Solar‐Terrestrial Environment Laboratory Nagoya University  Nagoya Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069865091","@type":"Researcher","foaf:name":[{"@value":"T. Nagatsuma"}],"jpcoar:affiliationName":[{"@value":"National Institute of Information and Communications Technology  Tokyo Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069865088","@type":"Researcher","foaf:name":[{"@value":"A. Yoshikawa"}],"jpcoar:affiliationName":[{"@value":"Department of Earth and Planetary Sciences, International Center for Space Weather Science and Education Kyushu University  Fukuoka Japan"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069865089","@type":"Researcher","foaf:name":[{"@value":"D. Baishev"}],"jpcoar:affiliationName":[{"@value":"Institute of Cosmophysical Research and Aeronomics Siberian Division of the Russian Academy of Sciences  Yakutsk Russia"}]},{"@id":"https://cir.nii.ac.jp/crid/1381699995069864960","@type":"Researcher","foaf:name":[{"@value":"K. T. Murata"}],"jpcoar:affiliationName":[{"@value":"National Institute of Information and Communications Technology  Tokyo Japan"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"21699380"},{"@type":"EISSN","@value":"21699402"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2014-05","prism:volume":"119","prism:number":"5","prism:startingPage":"3444","prism:endingPage":"3462"},"reviewed":"false","dcterms:accessRights":"http://purl.org/coar/access_right/c_abf2","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2F2012JA018585"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1002/2012JA018585"}],"createdAt":"2014-04-21","modifiedAt":"2023-10-03","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/2051151842044692096","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Review of the accomplishments of midlatitude Super Dual Auroral Radar Network (SuperDARN) HF radars"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1002/2012ja018585"},{"@type":"OPENAIRE","@value":"doi_dedup___::8ae4e91d1793725d4f07ae0fa0c7c739"},{"@type":"CROSSREF","@value":"10.1186/s40645-019-0270-5_references_DOI_FicRIaQKGkUm6WsYZKlmoIDF3Y4"}]}