NASA

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卫星是1963年美国空暨太空总署发射同步传输卫星.

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.

湾流空和宇德莱顿飞研究中心测试结构完整性'安静斯派克'爆音缓和对美国天F - 15B条试验飞机。