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(Vice)   A cable caved in the Arecibo   (vice.com) divider line
    More: Fail, SETI, Radio telescope, Galaxy, Observatory, Arecibo Observatory, largest single-aperture radio telescopes, Telescope, GoldenEye  
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1316 clicks; posted to Fandom » on 12 Aug 2020 at 7:43 AM (22 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



37 Comments     (+0 »)
 
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2020-08-12 6:38:51 AM  
No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.
 
2020-08-12 7:01:04 AM  

yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.


It's in PR and related to science... Don't hold your breath.
 
2020-08-12 7:09:41 AM  
vignette.wikia.nocookie.netView Full Size
 
2020-08-12 7:19:19 AM  
In any other timeline I would think it would be repaired.
 
2020-08-12 7:35:13 AM  

Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.


Trump would sell Puerto Rico if he could.
 
2020-08-12 7:36:51 AM  
Purely as a piece of useful technology, it's not a huge loss. It's an old telescope and things like the Very Large Array are more flexible and more powerful.

In terms of observational time, every telescope loss hurts, because there's only so much to go around. That's years of data collection (assuming it gets fixed) that won't happen now.

As a symbol of human scientific achievement and aspiration, it's devastating if it isn't fixed.
 
2020-08-12 8:02:50 AM  
It's 2020.  Aliens show up and we can't talk to them because Arecibo is broken.

/my dad interviewed for a job there
 
2020-08-12 8:09:29 AM  
:(
 
2020-08-12 8:15:04 AM  
Oh, Crap.   I wonder if the Chinese sabotaged it so that the FAST can hog all the glory.


Looks like it's on the edge, though, and that's not the end of the World.  I limits where you can point it, but doesn't completely put the telescope out of action.  One of the things about Arecibo is that while it's 300 meters in diameter, only about 221 meters of it is "illuminated" at any given time.   That's how they "aim" it, by picking which part of the spherical reflector they are observing.

Radar operations would be most affected, because you can't radiate while people are fixing the reflector, but passive observations should be doable, at least under certain conditions.   Though using electrical tools might fark up the data.
 
2020-08-12 8:18:19 AM  

Jake Havechek: Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.

Trump would sell Puerto Rico if he could.


Probably asked to trade it for Greenland
 
2020-08-12 8:22:53 AM  

nmrsnr: Purely as a piece of useful technology, it's not a huge loss. It's an old telescope and things like the Very Large Array are more flexible and more powerful.


The physical structure of the telescope is old.   But that doesn't matter.   It's the electronics that matter, and that's independent of the physical structure, and has been upgraded numerous times since Arecibo was built back in the early 1960's.   It's not like they're using tube receivers and the like anymore.

Also, while the VLA can have a much larger resolution through interferometry techniques, the collecting area is only slightly more than half that of Arecibo.   VLA can view a wider swath of the sky, but Arecibo has a very powerful planetary radar system that VLA doesn't have.

Apples and oranges.
 
2020-08-12 8:23:29 AM  

enry: Jake Havechek: Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.

Trump would sell Puerto Rico if he could.

Probably asked to trade it for Greenland


Can you guys go be dicks elsewhere while we discuss this?
 
2020-08-12 8:29:57 AM  

enry: Jake Havechek: Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.

Trump would sell Puerto Rico if he could.

Probably asked to trade it for Greenland


If Trump can't build a hotel on it, he's not interested.  And that is definitely not resort type real estate.
 
2020-08-12 8:38:33 AM  
I guess not.
 
2020-08-12 8:38:48 AM  
Here's a pic I took nearly 20 years ago and it looked like a big rust bucket then. I can only imagine what a couple of hurricanes and years of salt air exposure can do to its structural integrity. I'm sure it'll buff out though. A fresh coat of paint and good as new.

Fark user imageView Full Size
 
2020-08-12 8:57:55 AM  

flamark: I can only imagine what a couple of hurricanes and years of salt air exposure can do to its structural integrity.


Years of "salt air"?

Arecibo is 9 miles from the ocean, in a deep karst valley, surrounded by other deep karst valleys.  I'm pretty sure no salt spray makes it that far inland.

Any evaporated water from the ocean won't contain salt, that's precisely how you get salt from seawater, by evaporating the water, leaving the salt.
 
2020-08-12 9:38:12 AM  
Was scheduled to visit Arecibo last year when Dorian started chasing our cruise ship back to Miami. We ended up getting to Puerto Rico earlier on Monday. Guess what's closed on Monday and Tuesday's?
 
2020-08-12 10:29:43 AM  
That's what happens when a Russian double agent falls through your dish.

Fark user imageView Full Size
 
2020-08-12 10:35:13 AM  

Jake Havechek: Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.

Trump would sell Puerto Rico if he could.


Show him a picture of it from the air next to a picture of the Death Star and tell him that we are building the planet killing death ray in PR as part of his Space Force. He'll jump at the possibilities.
 
2020-08-12 10:39:58 AM  

dittybopper: Oh, Crap.   I wonder if the Chinese sabotaged it so that the FAST can hog all the glory.


Looks like it's on the edge, though, and that's not the end of the World.  I limits where you can point it, but doesn't completely put the telescope out of action.  One of the things about Arecibo is that while it's 300 meters in diameter, only about 221 meters of it is "illuminated" at any given time.   That's how they "aim" it, by picking which part of the spherical reflector they are observing.

Radar operations would be most affected, because you can't radiate while people are fixing the reflector, but passive observations should be doable, at least under certain conditions.   Though using electrical tools might fark up the data.


There'll be a bunch of warm ground radiating microwave radiation into the feed though. Even if the hole is far off axis, there's going to be enough noise from the background radiation working it's way in to greatly reduce performance. Blocking off-axis thermal radiation from the surround jungle is why the perimeter of the dish is lined with a fence.
 
2020-08-12 10:42:43 AM  

dittybopper: Oh, Crap.   I wonder if the Chinese sabotaged it so that the FAST can hog all the glory.


Looks like it's on the edge, though, and that's not the end of the World.  I limits where you can point it, but doesn't completely put the telescope out of action.  One of the things about Arecibo is that while it's 300 meters in diameter, only about 221 meters of it is "illuminated" at any given time.   That's how they "aim" it, by picking which part of the spherical reflector they are observing.

Radar operations would be most affected, because you can't radiate while people are fixing the reflector, but passive observations should be doable, at least under certain conditions.   Though using electrical tools might fark up the data.


The aiming dome on top got hit as well as the lower dish mesh and they can't get to the top bit yet.

Salt water will get 9 miles inland with large tropical storms.  As long as the mesh doesn't rust away, it still works.  Most of the problem with the mesh is stuff is trying to grow on it.
 
2020-08-12 10:54:11 AM  

ChiliBoots: dittybopper: Oh, Crap.   I wonder if the Chinese sabotaged it so that the FAST can hog all the glory.


Looks like it's on the edge, though, and that's not the end of the World.  I limits where you can point it, but doesn't completely put the telescope out of action.  One of the things about Arecibo is that while it's 300 meters in diameter, only about 221 meters of it is "illuminated" at any given time.   That's how they "aim" it, by picking which part of the spherical reflector they are observing.

Radar operations would be most affected, because you can't radiate while people are fixing the reflector, but passive observations should be doable, at least under certain conditions.   Though using electrical tools might fark up the data.

There'll be a bunch of warm ground radiating microwave radiation into the feed though. Even if the hole is far off axis, there's going to be enough noise from the background radiation working it's way in to greatly reduce performance. Blocking off-axis thermal radiation from the surround jungle is why the perimeter of the dish is lined with a fence.


You can fix that temporarily with a metallized tarp, or even something like metal windowscreen.  Since you're not using that as a reflective surface, you don't care how accurate it is, just that it blocks what you're trying to block.

Seriously, I gave this a bit of thought before I posted.
 
2020-08-12 11:00:34 AM  

Jake Havechek: Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.

Trump would sell Puerto Rico if he could.


He needs to have the president of Puerto Rico disposed of first.
 
2020-08-12 11:00:44 AM  

DON.MAC: The aiming dome on top got hit as well as the lower dish mesh and they can't get to the top bit yet.


Yeah, OK, that is a problem.  TFA didn't mention that, only damage to the reflecting surface.

Better article:

https://astronomynow.com/2020/08/11/a​r​ecibo-radio-telescope-damaged-by-cable​-break/

The break occurred about 2:45 a.m. (6:45 GMT) When the three-inch cable fell it also damaged about 6-8 panels in the Gregorian Dome and twisted the platform used to access the dome. It is not yet clear what caused the cable to break.

That's probably going to be easier to fix, provided they get safe access to the Gregorian dome.

The big problem is going to be fixing the cable......

/Bow-chicka-wow-wow
 
2020-08-12 11:02:21 AM  

DON.MAC: Salt water will get 9 miles inland with large tropical storms.


And it gets washed off by the rain water pretty much immediately.
 
2020-08-12 11:04:20 AM  

ChiliBoots: There'll be a bunch of warm ground radiating microwave radiation into the feed though. Even if the hole is far off axis, there's going to be enough noise from the background radiation working it's way in to greatly reduce performance. Blocking off-axis thermal radiation from the surround jungle is why the perimeter of the dish is lined with a fence.


Wasn't the original dish on the ground and then elevated later?
 
2020-08-12 11:08:52 AM  

dittybopper: DON.MAC: Salt water will get 9 miles inland with large tropical storms.

And it gets washed off by the rain water pretty much immediately.


The building code here requires salt resistant 20km inland in areas that get hit with tropical storms due to salt getting in small places and hiding.  The solar panel roof mounting rails I just installed had options for two types of screws depending on the locations.  The one requires the screws to be washed off every 6 months for warranty.
 
2020-08-12 11:14:29 AM  

DON.MAC: ChiliBoots: There'll be a bunch of warm ground radiating microwave radiation into the feed though. Even if the hole is far off axis, there's going to be enough noise from the background radiation working it's way in to greatly reduce performance. Blocking off-axis thermal radiation from the surround jungle is why the perimeter of the dish is lined with a fence.

Wasn't the original dish on the ground and then elevated later?


I don't know about that without looking it up, but the metal surface of the dish would still shield the feedpoint from thermal radiation by reflecting it off the back surface back towards the ground.
 
2020-08-12 12:42:48 PM  
China's dish is nice and all, and i hope 'El Radar" gets fixed; it was hanging by a thread financially for some time... but the Square Kilometer Array promises to beat them all. Like the VLA on steroids, it will be able to image a pimple on God's Ass.
 
2020-08-12 1:31:32 PM  
A cable caved in the Arecibo
I never hit so hard in love
All I wanted was to break your walls
All you ever did was wreck me
Yeah, you, you wreck me
 
2020-08-12 3:11:17 PM  

DON.MAC: dittybopper: DON.MAC: Salt water will get 9 miles inland with large tropical storms.

And it gets washed off by the rain water pretty much immediately.

The building code here requires salt resistant 20km inland in areas that get hit with tropical storms due to salt getting in small places and hiding.  The solar panel roof mounting rails I just installed had options for two types of screws depending on the locations.  The one requires the screws to be washed off every 6 months for warranty.


Meh.

Twenty kilometers is just 12.4 miles:

Fark user imageView Full Size


Plus, as I said, this is deep in the mountains, and at an elevation of 500 meters.
 
2020-08-12 5:44:31 PM  

Jake Havechek: Tr0mBoNe: yohohogreengiant: No!

One of the coolest man-made things anywhere.

I hope they fix it. It's just money. Which we don't have I guess.

It's in PR and related to science... Don't hold your breath.

Trump would sell Puerto Rico if he could.


trade it to Denmark for Greenland
 
2020-08-12 9:37:34 PM  

Marcus Aurelius: [vignette.wikia.nocookie.net image 516x516]


PirateKing: That's what happens when a Russian double agent falls through your dish.

[Fark user image 850x637]


Goddammit.

Fark user imageView Full Size


Inconsolable.
 
2020-08-12 10:09:05 PM  
Such an iconic representation of science and human curiosity. Hope some geek billionaire with a shred of decency makes it his pet project to restore it.
Regardless of its limitations it reminds us of a time when we looked up at the stars instead of into our self absorbed little bubbles of outrage.
 
2020-08-12 10:17:20 PM  
The articles don't really reveal how serious a problem this is for the observatory - it has been seriously underfunded for years now and was close to being shutdown.  This could be a death knell.
 
2020-08-12 11:09:39 PM  

mossberg: The articles don't really reveal how serious a problem this is for the observatory - it has been seriously underfunded for years now and was close to being shutdown.  This could be a death knell.


I don't think they know.  If one cable broke, will others? Restringing the cable could be a problem since it is a 1960s design used for bridges of that era and not like the modern ones. The bottom dish is easy to fix.  The other bits are much more tricky.

Paul Allen used to donate and his sister doesn't seem to be interested in the same types of projects.  Another contributor was a movie director who helped pay for the million channel SETI receiver.
 
2020-08-13 9:54:12 AM  
Someone posted this link on the reg with several more photos
https://www.naic.edu/~phil/hardware/t​e​lescope/auxmain200810/photos/
 
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