夏威夷现多条绿色雷射光束快速移动 疑中国卫星
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日本国立天文台九日判定,设在美国夏威夷的昂星团望远镜一月廿八日拍到的多条绿色雷射光束,来自中国环境监测卫星“大气一号”。(取自网络)
日本国立天文台(NAOJ)设在美国夏威夷的昂星团望远镜上月拍到,夜空中突然出现多条绿色雷射光束,如同布幕般快速移动的画面,引发外界众说纷纭。日本天文学家九日判定,这来自中国环境监测卫星“大气一号”。
日天文望远镜拍到
NAOJ设在美国夏威夷最高峰毛纳基山的昂星团望远镜一月廿八日拍到,夜空中突然出现多条绿色雷射光束,如同布幕般快速移动的画面,全程约一秒时间,外星人扫描地球一说在网络广为流传。NAOJ专家日前分析,光幕可能是’来自美国航太总署(NASA)用于监测冰川和森林的卫星ICESat-2。
不过,NASA
ICESat-2卫星团队科学家马蒂诺指出,望远镜拍到的画面和ICESat-2发射的雷射特徵并不相符。NAOJ分析多枚卫星运行轨道之后,九日引述ICESat-2卫星团队科学家的说法,判定光束最有可能来自中国二○二二年四月发射的环境监测卫星“大气一号”,其主要任务是监测全球温室气体排放和大气污染,将远距监测数据提供生态环境部门、全球气候变化等科学研究使用。
大气一号卫星包含五项设备,其中之一是气溶胶和二氧化碳监测雷射光雷达(ACDL)。ACDL的运作原理类似于声纳,但不是发射音波,而是透过发射特定波长的双波长雷射光绘制地区概况,因此导致夏威夷夜空出现绿色光幕。中国计画再发射一枚“大气二号”,与“大气一号”卫星组网运行,共同监测全球温室气体排放。
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