NASA

1.The first satellites placed in geostationary orbit were the synchronous communication(SYNCOM)satellites launched by NASA in 1963.

一个放置在对地静止轨道的卫星是1963年美国航<>an class="key">空暨太空总署发射的同步传输卫星.

2.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'爆音缓和对美国航天局的F - 15B条试验飞机。