JAXA Repository / AIREX 未来へ続く、宙(そら)への英知

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Other TitleUltra-Low Cost Space Transportation for SPS
Author(jpn)小谷, 知己; コリンズ, パトリック; 斉藤, 博栄
Author(eng)Kotani, Tomoki; Collins, Patrick; Saito, Hiromasa
Author Affiliation(jpn)三菱スペース・ソフトウエア; 麻布大学; 三菱スペース・ソフトウエア
Author Affiliation(eng)Mitsubishi Space Software; Azabu University; Mitsubishi Space Software
Issue Date2011-05-17
PublisherInstitute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)
Publication title30th ISAS Space Energy Symposium
Publication date2011-05-17
AbstractIn 2010 the Japanese SPS Research Society established a Sub-Committee to study the feasibility of Ultra-Low Cost Space Transportation for SPS. This was because in 2009 the Japanese government published its new Space Basic Plan, which (for the first time) includes a "Road-Map" leading to the development of a 1 GW Solar Power Satellite in 2030. The first stages of work are quite small, and will use existing satellite and launch systems. However, it is well understood that in order for an SPS to be able to supply electric power on Earth at competitive prices, its components must be launched to orbit at a cost of about 1% of existing expendable launch vehicles. The Sub-Committee has started its work by agreeing on the overall direction of its work.The Interim Report concludes that there are two necessary conditions for reducing the cost of reaching orbit by 99%:1) Fully reusable vehicles are needed, capable of rapid turn-round like aircraft.2) A large market is needed so that many vehicles can be built and flown repeatedly.The Sub-Committee believes that only one market is capable of growing to large scale, that is, passenger travel, for which there is known to be large potential demand - if a safe, low-cost service is developed. Furthermore, the U.S. Department of Commerce has explained that the best way to develop reusable vehicles capable of flying to orbit is to start by developing sub-orbital passenger-carrying vehicles. This is a convenient conclusion, since the cost and risk of developing sub-orbital vehicles are very much less than for orbital vehicles. Moreover, after the initial development costs have been paid, the further development is likely to be funded by private companies developing popular new domestic tourism services.Starting from this position, the Sub-Committee will continue its work by trying to clarify details such as the costs, benefits and time-scale of a scenario leading to development of ultra-low cost orbital transportation.
DescriptionMeeting Information: The thirtieth Space Energy Symposium (February 25, 2011. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS)), Sagamihara, Kanagawa Japan
Note: One CD-ROM
はじめに: 太陽発電衛星(SPS)研究会では宇宙輸送費の低価格化の実現に特化して研究、検討を行う「宇宙輸送費超低価格化分科会」を立ち上げた。SPS(分科会では商用宇宙発電と呼ぶ)の将来の商業化にはコストの大部分を占める輸送コストを現在の使い捨てロケットの1%程度にする必要がある。これを「宇宙輸送費の超価格化」と呼ぶ。本分科会では、重要なポイントは「完全再使用型宇宙輸送機」と「大量需要」と考えており、このような考えからスタートして、様々な研究、検討を行い、実現に向けての提言、シナリオとしてレポートにまとめることを目的に活動している。今回は中間報告として、ベースになる基本的な考え方を紹介する。
会議情報: 第30回宇宙エネルギーシンポジウム(2011年2月25日, 宇宙航空研究開発機構宇宙科学研究所相模原キャンパス), 相模原市, 神奈川県
形態: CD-ROM1枚
Document TypeConference Paper
JAXA Categoryシンポジウム・研究会

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