;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
1963
国航空暨太空总署发射的同步传输卫.
〉国家航空和宇宙航行局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1963国航空暨太空总署发射的同步传输卫.
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.
湾流航空和宇航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'爆音缓和对国航天局的F - 15B条试验飞机。
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