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原定于一月二十日进行首航的美国“挑战者”号航天飞机,因主发动机泄漏等问题几经延期,终于在四月四日从肯尼迪航天中心起飞,按计划飞行了五天,于四月九日安全地降落在爱德华兹空军基地。在飞行期间,按计划完成了各种科学试验,并从太空发射了一颗重约2.5吨的跟踪和数据中继卫星(TDRS)。 TDRS卫星从航天飞机施放后,由于惯性末级的第二级火箭提前熄火二、三十秒钟,致使卫星未能进入预定轨道,卫星在二万二千多公里到三万五千多公里高的一条椭圆形轨道上运行。
Originally scheduled for the inaugural flight on January 20, the U.S. Challenger space shuttle finally landed on April 4 from the Kennedy Space Center on April 4 and was on schedule for five days as the main engine leaked. April 9 landed safely at Edwards Air Force Base. During the flight, various scientific experiments were completed as scheduled and a tracking and data relay satellite (TDRS) weighing about 2.5 tons was launched from space. After the release of the TDRS satellite from the space shuttle, the satellites failed to enter the intended orbit due to the premature flameout of the second stage rockets at the final stage of inertia of 20 to 30 seconds, and the satellites were over 22,000 km to 35,000 km Running on an oval track.