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Hubble's emergency gyroscope mistakenly returned to extremely high rotational speeds.
NASA Brings Seven-Year-Old Ground-Mounted Hubby Telescope Gyro Back to Life After Space Vehicle Entered Secure Mode Due to US Space Agency said Tuesday that the gyroscope had failed earlier this month.
A gyroscope is a device that measures the rotational speed of the probe and is needed to help Hubble turn and lock to new targets.
Hubble's backup gyroscope, shut down for more than 7.5 years, mistakenly returned extremely high rotation rates, NASA said in a statement.
This gyroscope was activated after the spacecraft entered safe mode following a failed gyroscope on October 5th.
Additional testing will be done to ensure that Hubble can return to scientific operations with this gyroscope, NASA said.
To correct high rotational speeds, the Hubble team proceeded with an ongoing restart of the gyro on October 16th.
procedure We turned off the gyroscope for a second, then restarted it before the wheel spins.
However, the data show no improvement in gyroscope performance.
The team then commissioned a series of space vehicles on October 18th. maneuvers or turns in opposite directions to try to clear any blockage that could have deconcentrated the float and produce extremely high flows.
During each maneuver, the gyro went from high mode to low mode. dislodge any blockage that may have accumulated around the float.
They found a significant reduction in high rates, making it possible to measure the rates in low mode for short periods.
On October 19, the team again commissioned Hubble. to perform additional maneuvers and gyroscope mode changes, which seems to have solved the problem.
The rotation speeds produced by the emergency gyro have since been reduced and are now within the expected range, NASA said.
A series of tests to evaluate the performance of the gyroscope in conditions similar to those encountered during routine scientific observations, including moving to targets, snapping to a target, and performing a precision score. var js, fjs = d.getElementsByTagName (s) [0]; if (d.getElementById (id)): js = d.createElement (s); js.id = id; js.src = "http://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.5&appId=213741912058651";fjs.parentNode.insertBefore(js, fjs);} (document, & # 39; ; script ',' facebook-jssdk '));
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