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OSIRIS-REx Completes Mechanical Environmental Testing

15 Dec 2015, 19:32 UTC
OSIRIS-REx Completes Mechanical Environmental Testing
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The OSIRIS-REx spacecraft continues to progress smoothly through the Assembly, Test, Launch and Operations (ATLO) process. This past month, the team successfully and safely completed sine vibration (sine vibe) testing prior to the Thanksgiving holiday. The sine vibe tests are designed to verify the system performs as expected after being exposed to flight-like low frequency vibration input.
OSIRIS-REx is unpacked after moving over to the RAL facility.
The spacecraft will experience these vibrations during transport from Denver to Cape Canaveral for the launch and also during the rocket launch itself. The spacecraft will be shipped aboard a U.S. Air Force C-17 transport plane from Buckley Air Force Base near Denver to the Kennedy Space Center where it will undergo final processing in preparation for an early September launch. This transportation environment can induce low-frequency random, transient, and periodic vibrations at low levels, but with long durations. This stress has been known to cause spacecraft failures in the past. Perhaps most famously, the failure of the Galileo Jupiter probe high-gain antenna was probably the result of ground transportation vibration. In addition, flight data from numerous rocket launches show that significant random, transient, and periodic vibrations are transmitted to spacecraft payloads at ...

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