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Problem Detected on the James Webb Space Telescope – MIRI Anomaly
Scitech Daily ^ | SEPTEMBER 20, 2022 | By NASA

Posted on 09/20/2022 10:47:05 AM PDT by Red Badger

click here to read article


1 posted on 09/20/2022 10:47:05 AM PDT by Red Badger
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To: SunkenCiv; MtnClimber; SuperLuminal

Ruh Roh, Raggy!

WEBB Ping!....................


2 posted on 09/20/2022 10:47:45 AM PDT by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger; dfwgator

“Ask yourself how they could launch a billion-dollar satellite 🛰️ without checking its mirror?”

The Arrival 1996


3 posted on 09/20/2022 10:52:47 AM PDT by SaveFerris (Luke 17:28 ... as it was in the days of Lot; they did eat, they drank, they bought, they sold ......)
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To: Red Badger
Mira Anomaly.
We need more of these.


4 posted on 09/20/2022 10:55:31 AM PDT by DannyTN
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To: DannyTN

Miri................

5 posted on 09/20/2022 10:57:19 AM PDT by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: Red Badger
Hard to believe that Miri was 300 years older than Yeoman Rand.


6 posted on 09/20/2022 11:10:11 AM PDT by DannyTN
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To: Red Badger

Going to be a while to get a service guy out there......


7 posted on 09/20/2022 11:17:48 AM PDT by doorgunner69 (Let's go Brandon)
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To: DannyTN

Oil of Old Lady’s...................


8 posted on 09/20/2022 11:25:09 AM PDT by Red Badger (Homeless veterans camp in the streets while illegal aliens are put up in hotels.....................)
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To: SaveFerris

The issue is not in a mirror. The problem is in a rotating diffraction grating that acts like a prism to select the wavelength of electromagnetic spectrum (all longer wavelength than visible light) that reaches the photodetectors. The grating mechanicals seem to have unexpected drag that slows down the rotation into the desired position. It could be from temperature variations (one side of satellite is very hot and the other side is very cold) or it could be a micro meteroite strike that damaged bearing surfaces. It could be from a speck of dust that shook loose during launch.

You can bet that they are working on a triage strategy to put the diffraction grating into the position that provides the greatest value (likely the longest wavelength IR setting) in the event the grating gets stuck.

Note that this is only the medium resolution sensor, so even if it completely failed there would still be other sensors that are very valuable.


9 posted on 09/20/2022 11:25:29 AM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: MtnClimber

Heh

Movie quote


10 posted on 09/20/2022 11:39:50 AM PDT by SaveFerris (Luke 17:28 ... as it was in the days of Lot; they did eat, they drank, they bought, they sold ......)
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To: Red Badger

Those anomalies can really get you!

In the old days we called them problems.


11 posted on 09/20/2022 11:45:07 AM PDT by cymbeline
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To: MtnClimber

Thanks for the observation on setting the mechanism on its best setting in case it gets stuck.

Plus all of the other sensors that are working. Not exactly “backup”, but still valuable tools.

I was watching something about Princess Diana’s wedding. They had a backup wedding dress, bridal bouquet and the main cake available in case something went wrong.


12 posted on 09/20/2022 11:47:22 AM PDT by 21twelve (Ever Vigilant. Never Fearful.)
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To: MtnClimber

I take it the fix is all through manipulation from a computer from here?


13 posted on 09/20/2022 12:31:11 PM PDT by Beowulf9
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To: SaveFerris

I knew previous coworkers that worked on the Webb program and was brought in as a consultant on one problem during assembly (not design where I normally worked). I have also worked on numerous other satellite programs where I worked on every aspect as a Systems Engineer including Anomaly Detection and Resolution. This is not the main sensor on Webb and it could be cleared up by working the mechanism back and forth. But I can tell you that they will have the diffraction grating near the most valuable setting when they are trying to resolve the sticky operation. I am not involved in this issue at all, just drawing on past experience that includes Initial On-Orbit Testing of satellites that had anomalies.


14 posted on 09/20/2022 12:41:23 PM PDT by MtnClimber (For photos of Colorado scenery and wildlife, click on my screen name for my FR home page.)
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To: Red Badger

Hmmm...
If I had a dollar for every experiment glitch that I’ve seen (before retiring in 1986), I’d have a new bass boat by now...


15 posted on 09/20/2022 1:47:10 PM PDT by SuperLuminal
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To: doorgunner69

If it was a porno movie the repairman would be there in about 2 minutes


16 posted on 09/20/2022 2:25:35 PM PDT by al baby (Yes i know it was Gere )
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To: DannyTN
> Mira Anomaly. We need more of these.

Healthy-looking lass, that.

17 posted on 09/20/2022 2:50:17 PM PDT by dayglored ("Listen. Strange women lying in ponds distributing swords is no basis for a system of government.")
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To: DannyTN

I’m still digging on that 60s look. Don’t tell my wife.


18 posted on 09/20/2022 5:19:17 PM PDT by House Atreides (I’m now ULTRA-MAGA-PRO-MAX!)
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To: House Atreides

Startrek as never the same after losing her.


19 posted on 09/20/2022 5:30:37 PM PDT by DannyTN
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To: Red Badger

The telescope is running out of film.... : )


20 posted on 09/20/2022 5:52:00 PM PDT by minnesota_bound (Need more money to buy everything now)
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