{"created":"2023-06-20T14:43:54.514631+00:00","id":11274,"links":{},"metadata":{"_buckets":{"deposit":"29877cee-aaab-4527-a249-1fd5d485ce59"},"_deposit":{"created_by":1,"id":"11274","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"11274"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00011274","sets":["1543:1580:1594","1887:1891"]},"author_link":["98786","98785","98787","98788","98791","98792","98793","98783","98784","98790","98789","98782"],"item_5_alternative_title_2":{"attribute_name":"その他のタイトル（英）","attribute_value_mlt":[{"subitem_alternative_title":"Downlinking of VSOP-2 broadband data"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2005-09","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"77","bibliographicPageStart":"75","bibliographic_titles":[{"bibliographic_title":"第5回宇宙科学シンポジウム"},{"bibliographic_title":"Proceedings of the 5th Space Science Symposium","bibliographic_titleLang":"en"}]}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"次期スペースVLBI(VSOP-2)計画では、3つの観測周波数帯(8、22、43GHz)の観測信号の1Gbpsという超広帯域データ伝送をKa帯の電波を用いて行う。このような広帯域VLBI観測・高速データ伝送システムは既に地上では実用化され始めているが、スペースではまだ例がなく十分な検討が必要である。通信方式に周波数利用効率の良いOFDM(Orthogonal Frequency Division Multiplexing;直交周波数分割多重)によるマルチキャリア方式がVSOP-2ミッションを実現する有力な手段の1つであると考えられるが、本方式の場合、電力増幅器の非線形性がもたらすビットエラーレートの劣化が問題となる。これまで計算機シミュレーションによって検討を行った結果、電力増幅器の出力バックオフを数dB程度確保することでVSOP-2の観測に要求される条件を満たすことがわかった。また、回線設計を行った結果、晴天時、降雨時のいずれの場合でもリンクマージンを確保できることが分かった。","subitem_description_type":"Abstract"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0049122020","subitem_description_type":"Other"}]},"item_5_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"宇宙航空研究開発機構宇宙科学研究本部"}]},"item_5_publisher_9":{"attribute_name":"出版者（英）","attribute_value_mlt":[{"subitem_publisher":"Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"国立天文台"},{"subitem_text_value":"宇宙航空研究開発機構"},{"subitem_text_value":"宇宙航空研究開発機構"},{"subitem_text_value":"宇宙航空研究開発機構"},{"subitem_text_value":"宇宙航空研究開発機構"},{"subitem_text_value":"Korea Astronomy Observatory"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"National Astronomical Observatory"},{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency"},{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency"},{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency"},{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency"},{"subitem_text_language":"en","subitem_text_value":"Korea Astronomy Observatory"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"河野, 裕介"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"村田, 泰宏"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"平林, 久"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"望月, 奈々子"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"戸田, 知朗"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"輪島, 清昭"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kono, Yusuke","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Murata, Yasuhiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Hirabayashi, Hisashi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Mochizuki, Nanako","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Toda, Tomoaki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Wajima, Kiyoaki","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"リンクマージン","subitem_subject_scheme":"Other"},{"subitem_subject":"天文衛星","subitem_subject_scheme":"Other"},{"subitem_subject":"超長基線干渉計","subitem_subject_scheme":"Other"},{"subitem_subject":"ダウンリンク","subitem_subject_scheme":"Other"},{"subitem_subject":"横軸位相偏移変調","subitem_subject_scheme":"Other"},{"subitem_subject":"電力増幅器","subitem_subject_scheme":"Other"},{"subitem_subject":"ビット誤り率","subitem_subject_scheme":"Other"},{"subitem_subject":"直交周波数分割多重","subitem_subject_scheme":"Other"},{"subitem_subject":"データ転送","subitem_subject_scheme":"Other"},{"subitem_subject":"バックオフ","subitem_subject_scheme":"Other"},{"subitem_subject":"VSOP-2","subitem_subject_scheme":"Other"},{"subitem_subject":"link margin","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"astronomical satellite","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"very long base interferometry","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"downlinking","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"quadrature phase shift keying","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"power amplifier","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"bit error rate","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"orthogonal frequency division multiplexing","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"data transmission","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"back off","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"VSOP-2","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"VSOP-2広帯域データダウンリンク","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"VSOP-2広帯域データダウンリンク"}]},"item_type_id":"5","owner":"1","path":["1594","1891"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"11274","relation_version_is_last":true,"title":["VSOP-2広帯域データダウンリンク"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-21T06:39:50.055271+00:00"}