{"created":"2023-07-25T11:00:21.685303+00:00","id":2157,"links":{},"metadata":{"_buckets":{"deposit":"5bd814fb-a745-4999-ba6c-b3d474f7c213"},"_deposit":{"created_by":4,"id":"2157","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"2157"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00002157","sets":["1:356:401"]},"author_link":["17602","408","844","1400"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1987-03","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"116","bibliographicPageStart":"109","bibliographicVolumeNumber":"47","bibliographic_titles":[{"bibliographic_title":"Memoirs of National Institute of Polar Research. Special issue"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Araki, Takashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Sato, Natsuo","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Fujii, Ryoichi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kikuchi, Takashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_1_description_1":{"attribute_name":"ページ属性","attribute_value_mlt":[{"subitem_description":"P(論文)","subitem_description_type":"Other"}]},"item_1_description_12":{"attribute_name":"抄録(英)","attribute_value_mlt":[{"subitem_description":"The phase and the field strength of 12.1kHz Omega signals propagating from Aldra, Norway have been continuously recorded at three stations (Tjornes, Isafjordur and Husafell) in Iceland using a phase locked receiver with a loop antenna parallel to the great circle path between Aldra and each stations. Sudden phase and amplitude changes associated with magnetic substorms were observed on the VLF signals, for which the phase was advanced and amplitude was increased. From the results of calculation using the full wave method with a sharp density gradient model, it is suggested that these anomalies may be interpreted to be caused by precipitating high energetic electrons. That is, the density gradient in the lower ionosphere becomes steep, and the VLF signal intensity increases due to reflection at the sharp boundary. It is also suggested from the differences of the onset time of the phase and amplitude anomaly observed at the three stations that the particle precipitation region was restricted in a small area.","subitem_description_type":"Other"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA00733561","subitem_source_identifier_type":"NCID"}]},"item_1_text_10":{"attribute_name":"著者所属(英)","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Faculty of Education, Hirosaki University/National Institute of Polar Research/National Institute of Polar Research/Radio Research Laboratory"}]},"item_files":{"attribute_name":"ファイル情報","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_date","date":[{"dateType":"Available","dateValue":"1987-03-01"}],"displaytype":"detail","filename":"KJ00000012710.pdf","filesize":[{"value":"1.4 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000012710","url":"https://nipr.repo.nii.ac.jp/record/2157/files/KJ00000012710.pdf"},"version_id":"ee1d5fbe-6dee-4ecf-9704-2cf4652618be"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"departmental bulletin paper","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_title":"Phase and amplitude of VLF Omega signals observed simultaneously at three stations in Iceland in association with magnetospheric substorms","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Phase and amplitude of VLF Omega signals observed simultaneously at three stations in Iceland in association with magnetospheric substorms","subitem_title_language":"en"}]},"item_type_id":"1","owner":"4","path":["401"],"pubdate":{"attribute_name":"公開日","attribute_value":"1987-03-01"},"publish_date":"1987-03-01","publish_status":"0","recid":"2157","relation_version_is_last":true,"title":["Phase and amplitude of VLF Omega signals observed simultaneously at three stations in Iceland in association with magnetospheric substorms"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T13:52:32.444163+00:00"}