{"created":"2023-06-20T14:40:47.939852+00:00","id":7741,"links":{},"metadata":{"_buckets":{"deposit":"c4c0f698-70e6-42ce-893b-b7463bc1a20c"},"_deposit":{"created_by":1,"id":"7741","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"7741"},"status":"published"},"_oai":{"id":"oai:jaxa.repo.nii.ac.jp:00007741","sets":["1543:1544:1560","1887:1891"]},"author_link":["41603","41605","41606","41604","41608","41607"],"item_5_alternative_title_1":{"attribute_name":"その他のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"金星探査ウィンドウの検討"}]},"item_5_biblio_info_10":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2004-02","bibliographicIssueDateType":"Issued"},"bibliographicPageEnd":"253","bibliographicPageStart":"250","bibliographic_titles":[{"bibliographic_title":"平成15年度アストロダイナミクスシンポジウム:講演後刷り集"},{"bibliographic_title":"ISAS Proceedings of 13th Workshop on Astrodynamics and Flight Mechanics 2003: A Collection of Technical Papers","bibliographic_titleLang":"en"}]}]},"item_5_description_16":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"金星大気のダイナミックな挙動を解明する目的で検討が進められている金星探査計画(PLANET-C)では、これまで2008年打上げを想定して探査機システムなどの概念設計が実施されてきた。今回、バックアップウィンドウを確保するという観点から、2010年打上げの実現性について検討した。2010年打上げの地球→金星会合軌道は2008年打上げの場合に比べ、エネルギーが高く、軌道遷移に必要な速度増分が大きいという点で条件が悪く、ロケットにより打上げ可能な探査機重量がその分減少する。従って、これまで2008年打上げをベースに検討してきた探査機システムをそのまま2010年打ちに適用する事はできない。遷移軌道のエネルギー増大に伴う探査機重量の減少を補うために、探査機の打上げ方式を変更し、惑星間空間へパーキング軌道を用いずに直接投入するというダイレクト投入方式を採用した。さらに、ロケット最終段によるインジェクション直後に探査機推進系(Orbital Maneuvering Engine)を用いた加速(OME加速)を行うという方式も同時に実施する。これらの打上げ方式変更に伴い、探査機システム、特に推進系の燃料重量を見直し、探査機全体をコンパクトにする事で、2008年打ちで想定していた観測機器重量と同じ重量を確保する事ができる見通しが立った。","subitem_description_type":"Abstract"}]},"item_5_description_17":{"attribute_name":"抄録（英）","attribute_value_mlt":[{"subitem_description":"Launch feasibility of a Venus exploring mission is studied in this paper, so as to ensure the contingency of the backup launch in 2010. In the previous study of the PLANET-C Venus orbiter mission, a launch opportunity in 2008 was applied, which was one of the best conditions to transfer from Earth to Venus. On the other hand, the transfer orbit of the 2010 launch has energy disadvantage, in which larger velocity increment to encounter Venus is required than that of the 2008 launch. Thus the weight of the spacecraft turns out to be correspondingly smaller. In order to maximize the spacecraft weight, a simple injection strategy, a direct insertion method, is proposed here. In addition to the proposed launch sequence, subsequent acceleration by OME (Orbital Maneuvering bipropellant Engine) of the spacecraft propulsion system is used so as to lessen differences of the expected weight in the launch window. By applying the direct insertion method with the OME acceleration, the weight allocated to the scientific observation instruments enables to be kept same as that in the previous study, despite the energy disadvantage of the 2010 launch window.","subitem_description_type":"Other"}]},"item_5_description_32":{"attribute_name":"資料番号","attribute_value_mlt":[{"subitem_description":"資料番号: AA0046652040","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_source_id_21":{"attribute_name":"ISSN","attribute_value_mlt":[{"subitem_source_identifier":"0918-8053","subitem_source_identifier_type":"ISSN"}]},"item_5_text_6":{"attribute_name":"著者所属","attribute_value_mlt":[{"subitem_text_value":"宇宙航空研究開発機構 宇宙科学研究本部"},{"subitem_text_value":"宇宙航空研究開発機構 宇宙科学研究本部"},{"subitem_text_value":"宇宙航空研究開発機構 宇宙科学研究本部"}]},"item_5_text_7":{"attribute_name":"著者所属（英）","attribute_value_mlt":[{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency Institute of Space and Astronautical Science"},{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency Institute of Space and Astronautical Science"},{"subitem_text_language":"en","subitem_text_value":"Japan Aerospace Exploration Agency Institute of Space and Astronautical Science"}]},"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":"石井, 信明"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"山川, 宏"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"川口, 淳一郎"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Ishii, Nobuaki","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Yamakawa, Hiroshi","creatorNameLang":"en"}],"nameIdentifiers":[{}]},{"creatorNames":[{"creatorName":"Kawaguchi, Junichiro","creatorNameLang":"en"}],"nameIdentifiers":[{}]}]},"item_keyword":{"attribute_name":"キーワード","attribute_value_mlt":[{"subitem_subject":"金星","subitem_subject_scheme":"Other"},{"subitem_subject":"宇宙探索","subitem_subject_scheme":"Other"},{"subitem_subject":"予備調査","subitem_subject_scheme":"Other"},{"subitem_subject":"宇宙機打上げ","subitem_subject_scheme":"Other"},{"subitem_subject":"移行軌道","subitem_subject_scheme":"Other"},{"subitem_subject":"軌道挿入","subitem_subject_scheme":"Other"},{"subitem_subject":"OME","subitem_subject_scheme":"Other"},{"subitem_subject":"宇宙機推進","subitem_subject_scheme":"Other"},{"subitem_subject":"Venus","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"space exploration","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"feasibility study","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"spacecraft launching","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"transfer orbit","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"orbit insertion","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"OME","subitem_subject_language":"en","subitem_subject_scheme":"Other"},{"subitem_subject":"spacecraft propulsion","subitem_subject_language":"en","subitem_subject_scheme":"Other"}]},"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":"conference paper","resourceuri":"http://purl.org/coar/resource_type/c_5794"}]},"item_title":"Launch opportunities for Venus exploring missions","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"Launch opportunities for Venus exploring missions","subitem_title_language":"en"}]},"item_type_id":"5","owner":"1","path":["1560","1891"],"pubdate":{"attribute_name":"公開日","attribute_value":"2015-03-26"},"publish_date":"2015-03-26","publish_status":"0","recid":"7741","relation_version_is_last":true,"title":["Launch opportunities for Venus exploring missions"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-06-21T07:34:46.574701+00:00"}