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据2015年4月13日的美国《防务新闻》报道,日本的国家空间政策办公室于2015年1月份推出了1份新的为期10年的空间战略报告,首次将太空战略纳入其国家安全战略,不仅为了加强美日合作,也为了遏制中国。据第3版基本计划,日本优先扩建其用于GPS备份的准天顶区域导航卫星系统(QZSS)导航星座,以提升其空间态势感知(SSA)能力,并发展海域态势感知(MDA)
According to Defense News from the United States on April 13, 2015, Japan’s National Space Policy Office launched a new 10-year space strategy report in January 2015 that will include space strategy for the first time in its national security strategy, Not only to strengthen U.S.-Japan cooperation but also to contain China. According to the 3rd version of the Basic Plan, Japan will prioritize the expansion of its quasi-Zenith Regional Navigation Satellite System (QZSS) navigation constellation for GPS backup to enhance its SSA capabilities and to develop a marine situational awareness (MDA)