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Arecibo Observatory, Puerto Rico’s famous telescope, is battered by Hurricane Maria
Washington Post ^ | 9/21/17 | Sarah Kaplan

Posted on 09/21/2017 1:41:54 PM PDT by LibWhacker

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To: steve86

Bet that access road is mangled.


21 posted on 09/21/2017 3:52:29 PM PDT by steve86 (Prophecies of Maelmhaedhoc O'Morgair (Latin form: Malachy))
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To: steve86

I do not know the specific design details of the receiver, but understand that microwave/radar waves are “physically” much longer than light waves. A mirror (reflecting starlight) MUST be perfectly curved and smooth to the sub-micron level. A radar dish - search radar or ground control airport radar - is actually a “weave” of crossing metal bars, sometimes a mesh. You get more detail from a smaller wavelength, but more search capacity from a longer wave. It is very likely the “dish” is actually not really there, but is series of panels of wires or steel bars.


22 posted on 09/21/2017 3:56:52 PM PDT by Robert A Cook PE (I can only donate monthly, but socialists' ABBCNNBCBS continue to lie every day!)
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To: Robert A. Cook, PE

It really is a breathtaking sight-—I came upon it quite

by accident on a hike out of Camp Crozier-—a Peace Corps

training camp in 1963.


23 posted on 09/21/2017 4:05:32 PM PDT by oldbugleboy (oldbugleboy)
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To: Robert A. Cook, PE

I remember reading from long ago that the observatory was constructed in a natural bowl (crater?), with only minor excavation. But as you say, the ground surface is not going to be within 1/10 wavelength or whatever. As far as water accumulation, there must be some kind of natural drainage or the thing would be like Crater Lake.


24 posted on 09/21/2017 4:06:19 PM PDT by steve86 (Prophecies of Maelmhaedhoc O'Morgair (Latin form: Malachy))
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To: AmusedBystander

“ET send aid!”

I find it interesting that they can receive signals from millions of light-years away, but don’t have a shortwave radio or satellite phone to talk to someone in town.


25 posted on 09/21/2017 4:08:42 PM PDT by 21twelve (http://www.freerepublic.com/focus/f-news/2185147/posts FDR's New Deal = obama)
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To: 21twelve
I find it interesting that they can receive signals from millions of light-years away, but don’t have a shortwave radio or satellite phone to talk to someone in town.

It would be a hoot if we are ever visited and given a tour of the ship and their main means of communicating are CB radios.

10-4 Good buddy.

26 posted on 09/21/2017 4:29:49 PM PDT by AmusedBystander (The philosophy of the school room in one generation will be the philosophy of government in the next)
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27 posted on 09/21/2017 4:53:48 PM PDT by DoughtyOne (DACA: Their dream, our nightmare... will the rule of law prevail or not?)
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