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James Webb Telescope test: unexpected results


Waspie_Dwarf

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Engineers examine unexpected readings from JWST shake test

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NASA says engineers are diagnosing the source of “anomalous readings” during a recent vibration test of the sensitive optics and sensors at the heart of NASA’s James Webb Space Telescope.

In a status report posted to the JWST mission website, officials wrote that the anomalous accelerometer readings produced no visible signs of damage to the observatory, which engineers are stressing with a specially-crafted vibration rig to ensure it can survive the rigors of launch.

arrow3.gif  Read More: Spaceflight Now

 

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I hope it is nothing serious, I am so looking forward to this telescope coming on line successfully.  I have vivid memories of Hubble and its early problems but this machine has no second chances once it is safely away.

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  • 2 weeks later...

NASA's Webb Telescope to Resume Vibration Testing in January

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Vibration tests are one of the many tests that spacecraft and instruments endure to ensure they are fit for spaceflight. During routine testing of NASA's James Webb Space Telescope, an unexpected response occurred from several of the more than 100 devices designed to detect small changes in the motion of the structure. This prompted the engineers put the vibration tests on hold to determine the cause.

Since then, the team of engineers and scientists have analyzed many potential scenarios for the measured responses. They are closer to pinning down the cause, and have successfully conducted three low-level vibrations of the telescope.

All visual and ultrasonic examinations of the structure continue to show it to be sound.

arrow3.gif  Read More: NASA

 

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NASA Restarts Rigorous Vibration Testing on the James Webb Space Telescope

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Testing on the James Webb Space Telescope successfully resumed last week at NASA's Goddard Space Flight Center, in Greenbelt, Maryland.

On December 3, 2016, vibration testing automatically shut down early due to some sensor readings that exceeded predicted levels. After a thorough investigation, the James Webb Space Telescope team at NASA Goddard determined that the cause was extremely small motions of the numerous tie-downs or “launch restraint mechanisms” that keep one of the telescope’s mirror wings folded-up for launch.

arrow3.gif  Read More: NASA

 

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  • The title was changed to James Webb Telescope test: unexpected results
  • 3 months later...

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