Slashdot Mirror
NASA Revives Hubble Space Telescope After Three-Week Mechanical Failure (nasa.gov)
"NASA's Hubble Space Telescope returned to normal operations late Friday, Oct. 26, and completed its first science observations on Saturday, Oct. 27 at 2:10 AM EDT," NASA reports.
The observations were of the distant, star-forming galaxy DSF2237B-1-IR and were taken in infrared wavelengths with the Wide Field Camera 3 instrument. The return to conducting science comes after successfully recovering a backup gyroscope, or gyro, that had replaced a failed gyro three weeks earlier. A gyro is a device that measures the speed at which the spacecraft is turning, which is necessary to help Hubble turn and lock on to new targets. One of Hubble's gyros failed on Oct. 5, and the spacecraft's operations team activated a backup gyro the next day. However, the backup incorrectly returned rotation rates that were far in excess of the actual rates.
Last week the operations team commanded Hubble to perform numerous maneuvers, or turns, and switched the gyro between different operational modes, which successfully cleared what was believed to be blockage between components inside the gyro that produced the excessively high rate values. Next, the team monitored and tested the gyro with additional maneuvers to make sure that the gyro was stable. The team then installed additional safeguards on the spacecraft in case the excessive rate values return, although this is not anticipated...
Hubble is now back in its normal science operations mode with three fully functional gyros. Originally required to last 15 years, Hubble has now been at the forefront of scientific discovery for more than 28 years. The team expects the telescope will continue to yield amazing discoveries well into the next decade, enabling it to work alongside the James Webb Space Telescope.
Last week the operations team commanded Hubble to perform numerous maneuvers, or turns, and switched the gyro between different operational modes, which successfully cleared what was believed to be blockage between components inside the gyro that produced the excessively high rate values. Next, the team monitored and tested the gyro with additional maneuvers to make sure that the gyro was stable. The team then installed additional safeguards on the spacecraft in case the excessive rate values return, although this is not anticipated...
Hubble is now back in its normal science operations mode with three fully functional gyros. Originally required to last 15 years, Hubble has now been at the forefront of scientific discovery for more than 28 years. The team expects the telescope will continue to yield amazing discoveries well into the next decade, enabling it to work alongside the James Webb Space Telescope.
"but it got better."
A gyro is a device that measures the speed at which the spacecraft is turning, ...
Thanks. On this tech site, in this context, I was thinking tasty Greek snack.
[ Although, if the ones on Hubble *are* wrapped in lamb, that might explain the problems they're having ... ]
It must have been something you assimilated. . . .
I mean if you take a picture often enough, and match the stars, you’d have an incredibly accurate system for measuring orientation.
At the distances that Hubble looks at, it won't have trouble with star motion.
Pork is Greek.
And what you can buy is mystery meat.
TLDR: NASA turned it off and back on.
Turning it off then back on again worked!
Chas - The one, the only.
THANK GOD!!!
And believe me I am still alive
I'm doing science and I'm still alive
I feel fantastic and I'm still alive
While you're dying I'll be still alive
And when you're dead I will be still alive
Still alive, still alive
*** Suerte a todos y Feliz dia!
"Originally required to last 15 years, Hubble has now been at the forefront of scientific discovery for more than 28 years."
If we, as a civilization, could just set aside the petty sh*t that we seem to slide into, and do more of this kind of thing (well thought out, well made instruments that expand our knowledge of the universe), maybe we could reach a point where the conditions that motivate the 'radicals' could be overcome, kids could grow up happier and we could all enjoy a world with less fear.
--guess I'm in a mood today...--
Just as Elon was designing a new fail safe gyro and a rocket to take it to the Hubble and a robotic arm mount it, these impatient NASA engineers, with insatiable urge of self promotion, rushed in a fix. If they had simply collected the government salaries and sat on their butts like quiet boys they are supposed to be, anytime now we would have an amazing new gyro, even more amazing telescope repairing rocket and robotic arm. Just the other day the TV reporter on an invited tour caught Elon's laptop registering Orbital Mechanics 101 on line course, and the browser was downloading the SDK from SpaceRobotsRUs.com ! Lost a golden opportunity to advance space science! History will not forgive these short sighted NASA engineers.
sed -e 's/Chuck Norris/Rajnikant/g' joke > fact
A gyro is a device that measures the speed at which the spacecraft is turning, which is necessary to help Hubble turn and lock on to new targets.
Er, this is actually a positioning gyro, that is, a spinning wheel driven electrically that applies torque to the spacecraft when its rotational speed is changed. If you have a bunch of them aligned with the x/y/z axis of your craft you can point it in any direction without the use of thrusters.
A measurement gyro is also a spinning wheel, except that you don't rotate it - it rests in a set of gimbals allowing the craft to rotate around it freely. You can read your position by zeroing the gyro when you're pointing in a known direction, then you read the positions of the gimbals to figure out where you're pointing now.
You are in a twisty maze of processor lines, all alike.
There is a lot of hype here.