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<div class="ss"><div><span>导读： </span>NASA工程师Neerav Shah和Phil Calhoun计划利用2颗精确编队飞行的立方体卫星，形成一个“虚拟”望远镜，开展多种科学研究。该项目称为“立方体卫星虚拟天文望远镜对准实验”（CANYVAL-X），2颗卫星分别采用2U结构和1U ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div>NASA工程师Neerav Shah和Phil Calhoun计划利用2颗精确编队飞行的立方体卫星，形成一个“虚拟”望远镜，开展多种科学研究。该项目称为“立方体卫星虚拟天文望远镜对准实验”（CANYVAL-X），2颗卫星分别采用2U结构和1U结构，并计划在2016年中期由SpaceX公司的“猎鹰”运载火箭发射入轨。 </div><div style="text-align: center;"><p><a href="data/attachment/portal/201605/26/150751q8zh5mt55x243m0t.jpg" target="_blank"><img src="data/attachment/portal/201605/26/150751q8zh5mt55x243m0t.jpg"></a></p></div><div> 这两颗卫星将运行在700千米（435英里）高度的太阳同步轨道，相距10米（33英尺），且精确对准太阳的视线方向。其中的2U卫星将携带2个GNC系统，包括一个微型太阳敏感器和一个微型阴极电弧推进器（micro cathode arc thruster，mCAT）。太阳敏感器由NASA沃洛普斯飞行设施研制，用于计算太阳方位；mCAT推进器由乔治·华盛顿大学设计，尺寸和一个咖啡杯类似，用于与另一颗1U卫星保持对准。 </div><div><br></div><div><div>项目模拟图（引自NASA戈达德航天飞行中心） </div><div><br></div><div> 通过NASA的一项国际协议，Shah与韩国延世大学（Yonsei University）、韩国航空航天研究所（KARI）开展合作。延世大学、KARI负责建造2颗卫星，集成上述<a href="http://sensor.oecr.com" target="_blank" class="relatedlink">传感</a>器，并提供发射。 </div><div><br></div><div> 这项技术可用于研究太阳日冕，特别是日冕物质抛射——这些物质在到达地球时可干扰低地轨道卫星和地面电网，也可能用于对太阳系外行星的科学研究。 </div><div><br></div><div> 科学家通过日冕仪的遮光装置阻挡耀眼的星光，以发现隐藏在星光之中的黯淡物质，并利用相机或者光谱仪进行<a href="http://opticaltest.oecr.com" target="_blank" class="relatedlink">测量</a>。目前的天基日冕仪在同一个望远镜中集成了遮光装置和相机／光谱仪，其相距很近。 </div><div><br></div><div> 一些科学家认为，如果遮光罩和相机／光谱仪相隔数百英尺，可以获得更加详细的信息。一个典型案例就是日食。但现有技术无法建造如此规模的望远镜，一种解决途径就是发射两颗卫星，其中一颗卫星携带遮光装置，而另外一颗卫星携带科学设备。 </div><div><br></div><div> （曹强摘自www.spacenewsfeed.com，2016-02-18） </div></div><div style="text-align: center;"><p><a href="data/attachment/portal/201605/26/151435vdziilid8li9xjkq.jpg" target="_blank"><img 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