The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.
第一个放置在对地静止轨道的卫星是1963年美
<>an class="key">空暨太空总署发射的同步传输卫星.
abbr. National Aeronautics and Space Administration 〈美〉
家
空和宇宙行局
家空和宇宙行局Project Description: Gulfstream Aerospace and NASA's Dryden Flight Research Center tested the structural integrity of a telescopic 'Quiet Spike' sonic boom mitigator on a NASA F-15B testbed aircraft.
湾流空和宇局德莱顿飞行研究中心测试的结构完整性的伸缩'安静斯派克'爆音缓和对美
局的F - 15B条试验飞机。
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