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It creates an artificial star in the sky for the computers and scopes to analyse the turbulence in the atmosphere.
Certain elements are segregated at various heights in the atmosphere.
At around 70 miles natural sodium is present in the atmosphere so they create an artificial star using the sodium laser.
The atmospheric turbulence scrambles the 'point source' that the laser creates and so they calculate what the shape of the mirror should be at any time frame to undo the turbulent effects in the atmosphere.
This then gets applied to all the other stars in the field of view to 'correct' them for said turbulence in the final image.
This yields a much cleaner, sharper final image.
:beer:
You're welcome Bob, it's certainly very interesting what they do with the 'artificial star' laser.That's interesting info RB. Thanks for responding with it. Love it when I can learn something new. :thanks:
Ps, don't look, but Billy's selling all 6 of his lasers for 350.00. Steal of a deal!
See for overview: https://en.wikipedia.org/wiki/Laser_guide_star
This telescope uses 4 of them at same time: https://phys.org/news/2016-04-laser-star-facility-eso-large.html
You can buy a low cost modern one for about $40,000 from CNI China --see thread: https://laserpointerforums.com/f40/...w-589-159nm-001nm-laser-guide-star-94586.html
i very much like the color of these lasers used.
thank you for the links!
Also, wow what a great deal from Billy.
I'd love to buy them but I've got no room left... :crackup:
Ps, nice pics of the yellow lasers they are just awesome looking. :drool:
here they are in use!
Yep, they are sodium lasers. The DPSS 589nm we have are not far off the sodium wavelength so it is like owning your very own mini portable LGS.
The video plays for me once downloaded.
I might have just been impatient. I'm on an iPhone 5c I can't even rep people on this thing. Its so slow, its a dinosaur. If I'd stop buying lasers I'd be able to upgrade this thing.