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宇宙航空研究開発機構特別資料: 低推力・連続加速を用いた宇宙ミッションに関する研究会論文集 = JAXA Special Publication: Collection of Papers Presented at the Meeting on the Study of Space Missions Propelled by Low-Thrust and Sustained Acceleration. :7-12
Geostationary satellites need yearly velocity increment of 40 to 50 m/s for the North-Sounth (NS) station keeping. JAXA's recent satellites are adopting low-thrust and high Isp (specific impulse) engines such as DC arc jets and ion engines for the NS