{"@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/1363388845502417792.json","@type":"Article","productIdentifier":[{"identifier":{"@type":"DOI","@value":"10.1029/2005ja011386"}},{"identifier":{"@type":"URI","@value":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JA011386"}},{"identifier":{"@type":"URI","@value":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JA011386"}}],"dc:title":[{"@value":"Signatures of equatorial midnight temperature maximum as observed from in situ and ground‐based ionospheric measurements in the Indian sector"}],"description":[{"type":"abstract","notation":[{"@value":"<jats:p>Results of a preliminary study carried out on the features of midnight temperature maximum (MTM) over the Indian sector as observed from the first in situ electron temperature variations of Indian SROSS C2 RPA data, the thermospheric night airglow intensities at 630 nm recorded from a subtropical Indian station Waltair (17.7°N, 83.3°E) and a colocated Digital Ionosonde data are reported. The electron temperatures indicate that during the summer solstice months of low solar activity periods, there was a significant temperature gradient from the equator toward the latitudes of Waltair (14–18° N) from 2200 to 2400 hours IST even in the topside <jats:italic>F</jats:italic> region. In contrast, during the winter solstice months, temperature contours do not show significant gradient around midnight, though isolated peaks are seen between 0100 and 0300 hours IST, i.e., delayed in time by a couple of hours, suggesting that the MTM is weaker. The MTM induced <jats:italic>F</jats:italic> layer descent at subtropical latitudes due to a probable neutral wind modification and consequent increase in 630 nm night airglow zenith intensity are studied to characterize the MTM induced ionospheric changes in terms of the starting time, velocity of <jats:italic>F</jats:italic> layer descent indicative of the strength of MTM, and the time at minimum height indicative of the time of cessation of MTM induced perturbation. The results are discussed in the light of earlier work and the current understanding of the origin of equatorial MTM.</jats:p>"}]}],"creator":[{"@id":"https://cir.nii.ac.jp/crid/1383388845502417794","@type":"Researcher","foaf:name":[{"@value":"K. Niranjan"}],"jpcoar:affiliationName":[{"@value":"Department of Physics Andhra University  Visakhapatnam India"}]},{"@id":"https://cir.nii.ac.jp/crid/1383388845502417792","@type":"Researcher","foaf:name":[{"@value":"P. S. Brahmanandam"}],"jpcoar:affiliationName":[{"@value":"Department of Physics Andhra University  Visakhapatnam India"}]},{"@id":"https://cir.nii.ac.jp/crid/1383388845502417793","@type":"Researcher","foaf:name":[{"@value":"B. Srivani"}],"jpcoar:affiliationName":[{"@value":"Department of Physics Andhra University  Visakhapatnam India"}]}],"publication":{"publicationIdentifier":[{"@type":"PISSN","@value":"01480227"}],"prism:publicationName":[{"@value":"Journal of Geophysical Research: Space Physics"}],"dc:publisher":[{"@value":"American Geophysical Union (AGU)"}],"prism:publicationDate":"2006-07","prism:volume":"111","prism:number":"A7"},"reviewed":"false","dc:rights":["http://onlinelibrary.wiley.com/termsAndConditions#vor"],"url":[{"@id":"https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1029%2F2005JA011386"},{"@id":"https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2005JA011386"}],"createdAt":"2006-07-14","modifiedAt":"2023-10-31","relatedProduct":[{"@id":"https://cir.nii.ac.jp/crid/1050845763736019072","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@language":"en","@value":"Coordinated observations of postmidnight irregularities and thermospheric neutral winds and temperatures at low latitudes"}]},{"@id":"https://cir.nii.ac.jp/crid/1360004233290222208","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"On post‐midnight field‐aligned irregularities observed with a 30.8‐MHz radar at a low latitude: Comparison with<i>F</i>‐layer altitude near the geomagnetic equator"}]},{"@id":"https://cir.nii.ac.jp/crid/1360576118797089024","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Anomalous Increase in the Occurrence of Post‐Midnight FAI Radar Echoes in September 2019 and Its Relation With the Austral Sudden Stratospheric Warming"}]},{"@id":"https://cir.nii.ac.jp/crid/2050870367065763072","@type":"Article","resourceType":"学術雑誌論文(journal article)","relationType":["isReferencedBy"],"jpcoar:relatedTitle":[{"@value":"Review of the generation mechanisms of post-midnight irregularities in the equatorial and low-latitude ionosphere"}]}],"dataSourceIdentifier":[{"@type":"CROSSREF","@value":"10.1029/2005ja011386"},{"@type":"CROSSREF","@value":"10.1029/2012ja017692_references_DOI_NykyygohD7tGR6ADsCbnHW1nRYg"},{"@type":"CROSSREF","@value":"10.1029/2020ja028902_references_DOI_NykyygohD7tGR6ADsCbnHW1nRYg"},{"@type":"CROSSREF","@value":"10.1002/2017ja024048_references_DOI_NykyygohD7tGR6ADsCbnHW1nRYg"},{"@type":"CROSSREF","@value":"10.1186/s40645-018-0212-7_references_DOI_NykyygohD7tGR6ADsCbnHW1nRYg"}]}