STS-51-J was NASA's 21st Space Shuttle mission and the maiden flight of Space Shuttle Atlantis. It launched from Kennedy Space Center, Florida, on October 3, 1985, carrying a payload for the U.S. Department of Defense (DoD), and landed at Edwards Air Force Base, California, on October 7, 1985.

2023年7月21日 · STS-51J was the 21st NASA Space Shuttle mission and the first flight of Space Shuttle Atlantis.

2020年3月31日 · William Pailes became as MSE the second military astronaut in space. The crew deployed two military communications satellites DSCS III (USA-11 and USA-12). Both were launched into stationary orbits by an Inertial Upper Stage. The DSCS satellites used X-band frequencies (8/7 GHz).

STS-51-J （原先编号STS-28）是历史上第二十一次航天飞机任务，也是 亚特兰蒂斯号航天飞机 的首次太空飞行。

On Oct. 7, 1985, the astronauts closed Atlantis’ payload bay doors in preparation for reentry. They fired the shuttle’s orbital maneuvering engines to slow the vehicle’s velocity and began the descent back to Earth. Bobko guided Atlantis to a smooth landing at Edwards AFB, completing a flight of 4 days, 1 hour, and 45 minutes.

October 7, 1985 – 10:00:08 a.m. PDT at Runway 23, Edwards Air Force Base, California. Rollout distance was 8,056 feet. Rollout time was 65 seconds. Mission duration was 4 days, 1 hour, 44 minutes, 38 seconds. Landing occurred during the 64th orbit. This was the second dedicated flight for the Department of Defense.

Military mission, Deployed USA-11, USA-12. AKA: Atlantis. Launched: 1985-10-03. Returned: 1985-10-07. Number crew: 5 . Duration: 4.07 days. Orbits of Earth: 63. Landed at: Runway 23 dry lake bed at Edwards Air Force Base, . Touchdown miss distance: 754.00 m. …

2010年5月30日 · The Space shuttle mission STS-51-J was a mission by NASA that was the first to use the Space Shuttle Atlantis. Liftoff occurred on 3 October 1985, at 11:15 a.m. EDT, from launch pad 39A at the...

STS-51-J was NASA's 21st Space Shuttle mission and the maiden flight of Space Shuttle Atlantis. It launched from Kennedy Space Center, Florida, on October 3, 1985, carrying a payload for the U.S. Department of Defense (DoD), and landed at Edwards Air Force Base, California, on October 7, 1985.

Launch from Cape Canaveral (KSC); landing on Edwards AFB; SDI-mission of Space Shuttle; Pailes second military astronaut; deploying of two military communications satellites (DSCS III); first flight of orbiter Atlantis. 03 October 1985 15:21 GMT. Duration: 4.07 days. Call Sign: Atlantis. LV Configuration: STS-28 (51-J).