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http://www.popsci.com/technology/article/2011-08/nasa-optical-communications-demo-could-boost-deep-space-data-rates-100-fold
http://www.popsci.com/technology/article/2011-08/nasa-optical-communications-demo-could-boost-deep-space-data-rates-100-fold
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http://www.spacewar.com/reports/Ground_Based_Lasers_Could_Interfere_With_Orbiting_Satellites_999.html
http://www.unidir.ch/pdf/conferences/pdf-conf111.pdf
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http://news.naver.com/main/read.nhn?mode=LSD&mid=sec&sid1=105&oid=001&aid=0006068853
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