Webb Commissioning at L2

inertia

Super Member
Fingers crossed for the James Webb. Its a very ambitious project, because there is no way it can be serviced.

...and there are a lot of mechanisms that have not been deployed yet. I'll feel better after the Aluminum coated Kapton solar radiation shield is fully deployed.

Even Elon Musk doesn't have a group of minuteman astronauts at the ready for that kind of deep space repair.

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inertia

Super Member
- unfurling the giant sunshield begins


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( 1/ 3 / 2022 ) All five layers of the sunshield have been properly tensioned. This phase of the commissioning of the James Webb Telescope is complete!

Got mirror alignment?

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inertia

Super Member
(01/07-2022)

---> Saturday 1/08/2022 "Beginning no earlier than 9 a.m. EST, NASA will air live coverage of the final hours of Webb’s major deployments. After the live broadcast concludes, at approximately 1:30 p.m., NASA will hold a media briefing. Both the broadcast and media briefing will air live on NASA TV, the NASA app, and the agency’s website.

As the final step in the observatory’s major deployments, the Webb team plans to unfold the second of two primary mirror wings. When this step is complete, Webb will have finished its unprecedented process of unfolding in space to prepare for science operations."

Exploration begins
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CrowCross

Super Member
(01/07-2022)

---> Saturday 1/08/2022 "Beginning no earlier than 9 a.m. EST, NASA will air live coverage of the final hours of Webb’s major deployments. After the live broadcast concludes, at approximately 1:30 p.m., NASA will hold a media briefing. Both the broadcast and media briefing will air live on NASA TV, the NASA app, and the agency’s website.

As the final step in the observatory’s major deployments, the Webb team plans to unfold the second of two primary mirror wings. When this step is complete, Webb will have finished its unprecedented process of unfolding in space to prepare for science operations."

Exploration begins
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All systems are go for NASA’s James Webb Space Telescope, which has deployed its full gold-plated, sunflower-shaped mirror display.

Now, the $10 billion successor to the Hubble telescope has five months of alignment and calibration procedures before it is expected to start sending images back to Earth, the space agency said. article
 

inertia

Super Member
All systems are go for NASA’s James Webb Space Telescope, which has deployed its full gold-plated, sunflower-shaped mirror display.

Now, the $10 billion successor to the Hubble telescope has five months of alignment and calibration procedures before it is expected to start sending images back to Earth, the space agency said. article
Calibration is an intricate task - I believe five months should be more than enough time.
 

inertia

Super Member
I wonder what all they have to do.

From what I read it's in the Lagrange zone.
A-haw haw haw-haw
Heh, a-haw haw haw
Lagrange zones are known by applied Newtonian Mechanics. Stable orbits are helpful. What’s more complex is the Optical- Mechanical alignment of a large hexagonal array coupled with many other optical elements to sub-nanometer accuracy. Instruments that resolve thermal signatures and spectroscopic signatures also depend on precision based on well understood and stable sources. Performing these tasks correctly the first time is a time consuming task.

 

inertia

Super Member
Lagrange zones are known by applied Newtonian Mechanics. Stable orbits are helpful. What’s more complex is the Optical- Mechanical alignment of a large hexagonal array coupled with many other optical elements to sub-nanometer accuracy. Instruments that resolve thermal signatures and spectroscopic signatures also depend on precision based on well understood and stable sources. Performing these tasks correctly the first time is a time consuming task.


Correction: sub-micrometer precision instead of sub-nanometer accuracy

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