{"created":"2023-07-25T11:01:54.218949+00:00","id":4050,"links":{},"metadata":{"_buckets":{"deposit":"dd43bcf2-f02a-4665-bee2-ca530f0471cf"},"_deposit":{"created_by":4,"id":"4050","owners":[4],"pid":{"revision_id":0,"type":"depid","value":"4050"},"status":"published"},"_oai":{"id":"oai:nipr.repo.nii.ac.jp:00004050","sets":["1259:1260:1261:536:537"]},"author_link":["844","14708"],"item_1_biblio_info_14":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1988-02","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"209","bibliographicPageStart":"204","bibliographicVolumeNumber":"1","bibliographic_titles":[{"bibliographic_title":"Proceedings of the NIPR Symposium on Upper Atmosphere Physics"}]}]},"item_1_creator_8":{"attribute_name":"著者名(英)","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Nozaki, Kenrou","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":"Bottomside ionospheric observation was made with a microcomputer-controlled FM/CW ionosonde at Syowa Station, Antarctica. This ionosonde provides ionograms for the transmitter frequencies from 2 to 16MHz and also sequential data of virtual height (h') at a fixed frequency with a time resolution of 10s. Since the peak power of the FM/CW ionosonde is 20W, continuous observation was possible without disturbing other radio observations and HF radio communications. The continuous observation at a fixed frequency 2.6MHz shows periodic variations in the virtual height and echo intensity with periods of one to several tens of minutes. Periodic variations with a period of several tens of minutes may indicate a propagation or excitation of internal gravity waves during a geomagnetically quiet period, while a variation with a period of 1min could be caused by an oscillatory precipitation of energetic auroral particles.","subitem_description_type":"Other"}]},"item_1_identifier_registration":{"attribute_name":"ID登録","attribute_value_mlt":[{"subitem_identifier_reg_text":"10.15094/00004050","subitem_identifier_reg_type":"JaLC"}]},"item_1_publisher_22":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"National Institute of Polar Research"}]},"item_1_source_id_13":{"attribute_name":"雑誌書誌ID","attribute_value_mlt":[{"subitem_source_identifier":"AA10756224","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":"Okinawa Radio Wave Observatory, Radio Research Laboratory"},{"subitem_text_language":"en","subitem_text_value":"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":"1988-02-01"}],"displaytype":"detail","filename":"KJ00000035896.pdf","filesize":[{"value":"1.0 MB"}],"format":"application/pdf","licensetype":"license_6","mimetype":"application/pdf","url":{"label":"KJ00000035896","url":"https://nipr.repo.nii.ac.jp/record/4050/files/KJ00000035896.pdf"},"version_id":"84ee6f71-dcf4-4d29-89a0-179f67ab471e"}]},"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":"Preliminary results of the multimode FM/CW ionosonde experiment","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Preliminary results of the multimode FM/CW ionosonde experiment"}]},"item_type_id":"1","owner":"4","path":["537"],"pubdate":{"attribute_name":"公開日","attribute_value":"1988-02-01"},"publish_date":"1988-02-01","publish_status":"0","recid":"4050","relation_version_is_last":true,"title":["Preliminary results of the multimode FM/CW ionosonde experiment"],"weko_creator_id":"4","weko_shared_id":4},"updated":"2023-07-25T12:24:28.200485+00:00"}