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Visit the Kansas State Cosmosphere and Space Center online at. The Apollo Lunar Surface Journal for Apollo 12 - The transcript for the second EVA, when Conrad and Bean cut the scoop off Surveyor 3, begins at 134:28:20 the scoop was removed from Surveyor at the very end, almost as an afterthought as it was not on the original list of items to be returned. The Surveyor 3 scoop is described in a 1971 paper "Examination of the Surveyor 3 Surface Sampler Scoop Returned by the Apollo 12 Mission," by R. More about the Surveyor program: from NASA and from Wikipedia. The secrets of digging on the Moon are being revealed.Īuthor: Trudy E. "Obtaining the Surveyor replica really made the difference," says Agui. With this test bed in place, the team can, e.g., move forward to test alternate scoop designs and refine theories of lunar soil mechanics. "Our team is quite pleased to find that the measurements appear to be close to reproducing Surveyor 7 data from the Moon." The replicated scoop plunges into a rectangular "soil bed" filled with JSC-1a, a man-made moondust substitute that closely matches the known properties of lunar regolith, while a computer monitors bearing forces. "Measurements of digging forces are underway," he says. They've since constructed a replica of the scoop and now they are using it to dig into simulated lunar regolith. "We got measurements of the scoop accurate to 0.030 or 0.040 inch (~1 mm)." "Photogrammetry is pretty good," Agui remarks.
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The software was developed for the Columbia Accident Investigation Board activity. Then, using software, Robert Mueller of the Kennedy Space Center extracted dimensions using mathematical triangulation, measuring from points on the scoop to points where corners of dark checks meet on the cube. GRC team member Juan Agui, an expert in digging force experiments, photographed the scoop in its container next to a standard photogrammetry cube, which has a precise checkerboard pattern on it. They have a photographic studio setup with a white background. Photogrammetry is a technique of measuring objects strictly from photographs.
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So the Glenn team borrowed photogrammetry apparatus from the Kennedy Space Center. The Surveyor 3 scoop is in an airtight triangular container, and NASA curators do not wish the scoop to be removed because handling in air will degrade the historical fidelity of the unique artifact. You can't just lay a ruler along the scoop and read off the dimensions. Measuring the scoop, however, would prove to be no simple matter. All that's required is a little excavation.Ībove: Surveyor 3 scoop being examined by four of the members of the Regolith Characterization team from left to right they are Xiangwu (David) Zeng, Enrique Rame, Allen Wilkinson, and Juan Agui. For instance, there is plentiful oxygen bound up in ordinary moon rocks and, in polar regions, deposits of frozen water may lie hidden in the soil of shadowed craters. The rocky, dusty lunar soil or "regolith" contains many of the natural resources humans need to live. NASA is returning to the Moon with plans to establish an outpost-and this will inevitably require some digging. Namely, the secrets of digging on the Moon. until recently when researchers at NASA's Glenn Research Center (GRC) realized that that little scoop could hold big secrets. At some point in the intervening four decades, the scoop, owned by Johnson Space Center, was transferred on permanent loan to a space museum in Kansas. The little scoop, the camera, and other artifacts returned to Earth were analyzed and then put in storage. The very last thing they removed was a small scoop at the end of Surveyor's extendable arm, which had dug into the dry moon dust and gravel to make mechanical measurements of lunar soil. On their second four-hour EVA, Bean and Conrad walked over to Surveyor 3, took dozens of photographs and measurements, and began snipping off parts of metal tubing and electrical cables. Sign up for EXPRESS SCIENCE NEWS delivery