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Simplified Aid For EVA Rescue (SAFER) was tested on STS-64. The satellite recoveries on STS-51-A were the last untethered spacewalks until 1994, and marked the last use of the Manned Maneuvering Unit (MMU). One other experiment, a radiation monitoring experiment, was also performed. This mid-deck experiment was successful, and the proprietary results of the chemical mixes were turned over to 3M.
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It was the first of a series of comprehensive organic and polymer science experiments sponsored byģM. The STS-51-A mission also carried the Diffused Mixing of Organic Solutions (DMOS) experiment. The Westar satellite was, ironically enough, indeed later sold to Hong Kong-based AsiaSat.
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Following Westar 6's recovery, Gardner humorously held up a "For Sale" sign, as if trying to find someone to sell the malfunctioning satellites to, as a means to indicate the successful recovery and as a means to provide some comical relief for the troubled owners. With Allen's help, he placed it in a cradle in the cargo bay. This time, Gardner, using the same muscle-power technique Allen had used for Palapa B2's rescue, easily captured the satellite. The recovery of Westar 6 was not as difficult, and took place a day later. The successful, improvised rescue effort took two hours. Allen was able to manually maneuver the satellite into its cradle with Gardner's help, further aided by the Canadarm, which was operated by Fisher.
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The satellite's rotation was slowed to 1 RPM, and Gardner, operating from a position on the end of the Remote Manipulator System (RMS) ( Canadarm), attempted unsuccessfully to grapple the satellite. Mission specialists Allen and Gardner performed an EVA, capturing the satellite with a device known as a "Stinger" (Apogee Capture Device (ACD)), which was inserted into the satellite's apogee motor nozzle by Allen. On day five of the mission, Discovery rendezvoused with Palapa. The orbits of both satellites had been lowered by ground commands from about 970 km (600 mi) to 340 km (210 mi) to facilitate recovery operations. The orbiter then began a series of maneuvers to meet up with the first of the two satellites to be recovered, Palapa B2. The two communications satellites successfully deployed were Anik D2 (on the second day of the mission) and Syncom IV-1, also known as Leasat 1 (on the third day) both were Hughes-built satellites. STS-51-A marked the first flight of the Space Shuttle commanded by an astronaut from the 1978 class rather than the Apollo era. Both Gardner and Allen were making their second shuttle flights. Walker and three mission specialists – Anna Lee Fisher, Dale A. Hauck, commander, on his second flight pilot David M. The five-person flight crew consisted of Frederick H. A launch attempt the day before was scrubbed at T-minus 20 minutes due to high shear winds in the upper atmosphere.
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EST, on 8 November 1984, less than a month after the STS-41-G flight. STS-51-A was launched from Florida's Kennedy Space Center (KSC) at 7:15:00 a.m. EVA 2 End: 14 November 1984 – 16:51 UTCĬrew seating arrangements Seat.