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1992年5月7日,美国第五架航天飞机奋进号载7名宇航员进行首航。这次飞行的主要任务是拯救一颗在太空游荡而失去作用的通信卫星。这颗于1990年3月用大力神火箭发射的国际通信卫星6号,价值1.57亿美元,重4.5吨,高5.2米,能同时中转12万条电话线路和3个电视频道,每天可为国际通信卫星组织赚回24万美元。但发射后发生故障,未能进入预定的地球同步轨道,只停留在距地面370千米的低轨道上运行,无法按计划工作。
On May 7, 1992, the fifth U.S. space shuttle Endeavor carried its maiden voyage with seven astronauts. The main task of this flight is to save a communication satellite that has lost its role in space roaming. This international communications satellite, No. 6, launched on March 9, 1990 with a Hercules rocket, valued at 157 million U.S. dollars and weighing 4.5 tons and 5.2 meters high, can relay 120,000 telephone lines and 3 television channels at the same time, Communications Satellite Organization earned $ 240,000. However, after the launch, it failed to enter the scheduled geosynchronous orbit and remained on a low orbit 370 kilometers away from the ground and could not work as planned.