Arecibo still threatened with closure.

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Profile betreger Project Donor
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Message 1797303 - Posted: 19 Jun 2016, 1:59:34 UTC - in response to Message 1797290.  

To get a green star a 10$ once a year is all that is required although 10$ a month is 12 times better.
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Profile Bernie Vine Project Donor
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Message 1797330 - Posted: 19 Jun 2016, 7:59:30 UTC - in response to Message 1797290.  
Last modified: 19 Jun 2016, 13:29:00 UTC

Re: Funding.

Notice how many posters have no 'Green Star'.

Is a small contribution of $10 US per month (easy to setup). From all participants. Too much to ask for?


As I have said many times you can turn off your green star. As I do for that very reason.

So it is not and should not be used as an indicator as to whether a person has donated.

Also we all donate money when we crunch.
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Profile Clyde "Liberal"
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Message 1797434 - Posted: 19 Jun 2016, 22:09:34 UTC - in response to Message 1797330.  

Re: Funding.

Notice how many posters have no 'Green Star'.

Is a small contribution of $10 US per month (easy to setup). From all participants. Too much to ask for?


As I have said many times you can turn off your green star. As I do for that very reason.

So it is not and should not be used as an indicator as to whether a person has donated.

Also we all donate money when we crunch.

Fair comment.

How does one 'turn off' the Green Star?
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Profile Mr. Kevvy
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Message 1797435 - Posted: 19 Jun 2016, 22:18:06 UTC - in response to Message 1797434.  
Last modified: 19 Jun 2016, 22:19:51 UTC

How does one 'turn off' the Green Star?


There's an "Are all your donations anonymous?" setting in your account settings, bottom-left. You can turn off individual donations there. If you turn off enough of them that there's less than $10 in the last calendar year the star should disappear.
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Profile Clyde "Liberal"
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Message 1797438 - Posted: 19 Jun 2016, 22:22:50 UTC - in response to Message 1797435.  
Last modified: 19 Jun 2016, 22:23:24 UTC

How does one 'turn off' the Green Star?


There's an "Are all your donations anonymous?" setting in your account settings, bottom-left. You can turn off individual donations there. If you turn off enough of them that there's less than $10 in the last calendar year the star should disappear.

Since I make an automatic monthly contribution. Do I have to do this every month?
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Profile Chris S Crowdfunding Project Donor*
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Message 1797534 - Posted: 20 Jun 2016, 9:29:58 UTC

In common with Mr. Kevvy, I am proud to demonstrate my commitment to the project by showing my Green Star. But I fully accept that others may not be in such a fortunate position to be able to donate money on top of what they already spend on time and electricity. Whether the rest of us should not show our stars out of respect for that, is a personal decision. Even then a star does not say how much you donated, it could be $10 or 100 times that.
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Grant (SSSF)
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Message 1797544 - Posted: 20 Jun 2016, 10:19:28 UTC - in response to Message 1797534.  

Even then a star does not say how much you donated, it could be $10 or 100 times that.

The rate of spin directly proportional to the magnitude of the donation?
Grant
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Profile Chris S Crowdfunding Project Donor*
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Message 1797550 - Posted: 20 Jun 2016, 12:28:09 UTC - in response to Message 1797544.  

Actually no. A star that spins can mean a donation from $250-$10,000 from the recent crowd-funding appeal. What I gave is between my bank manager and myself. And all stars that spin do so at the same rate, regardless of the amount. Was there a specific point that you wished to make?
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Profile Gary Charpentier Crowdfunding Project Donor*
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Message 1797555 - Posted: 20 Jun 2016, 13:33:31 UTC - in response to Message 1797550.  

What I gave is between my bank manager and myself.

Perhaps not. https://crowdfund.berkeley.edu/project/1704/wall
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Message 1797597 - Posted: 20 Jun 2016, 18:09:16 UTC
Last modified: 20 Jun 2016, 18:21:06 UTC

If I calculate correctly Arecibo has about 10 dB more gain than Green Bank. Looking after modulated CW signals by cross correlation of two parallel receiver channels on the same frequency to get rid of the remaining noise it is then possible to do integration. Instead of integrating during 12 seconds, the time for a celestial object to travel the duration of the Arecibo dish, it should be possible with Green Bank looked on target to integrate up to about 40800 seconds per day, i.e. with Green Bank it should be possible to reach a lot further into space. Also for pulsed signals Green Bank have the advantage after post processing. In both cases of course you have to handle Radio Frequency Interference (RFI) another way. Still I will vote for more time on Green Bank not Arecibo.
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Message 1797608 - Posted: 20 Jun 2016, 19:51:21 UTC - in response to Message 1794850.  

Not to many signing the petition. I bet most people don't know what the Arecibo Observatory does. Maybe add to the description that it also searches for Extraterrestrial signals if we don't get 100,000 signatures.
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Richard Haselgrove Project Donor
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Message 1797619 - Posted: 20 Jun 2016, 21:45:03 UTC - in response to Message 1797597.  

If I calculate correctly Arecibo has about 10 dB more gain than Green Bank. Looking after modulated CW signals by cross correlation of two parallel receiver channels on the same frequency to get rid of the remaining noise it is then possible to do integration. Instead of integrating during 12 seconds, the time for a celestial object to travel the duration of the Arecibo dish, it should be possible with Green Bank looked on target to integrate up to about 40800 seconds per day, i.e. with Green Bank it should be possible to reach a lot further into space. Also for pulsed signals Green Bank have the advantage after post processing. In both cases of course you have to handle Radio Frequency Interference (RFI) another way. Still I will vote for more time on Green Bank not Arecibo.

I think you're neglecting the tracking capabilities of the azimuth arm on which the ALFA receiver is mounted - and it's the ALFA receiver which is the current source of the Arecibo recordings searched by SETI@Home.

According to http://www.naic.edu/~astro/guide/guide.pdf (specifically, table 2 on page 5), Arecibo has a maximum integration time of 166 seconds at an optimal declination around 18. Not as good as Green Bank, certainly, but not as bad as you suggest.
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Profile Clyde "Liberal"
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Message 1797628 - Posted: 20 Jun 2016, 22:10:49 UTC - in response to Message 1797608.  

Not to many signing the petition. I bet most people don't know what the Arecibo Observatory does. Maybe add to the description that it also searches for Extraterrestrial signals if we don't get 100,000 signatures.

Just added my signature.

Very few signatures :(
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Grant (SSSF)
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Message 1797636 - Posted: 20 Jun 2016, 22:34:15 UTC - in response to Message 1797550.  

Actually no. A star that spins can mean a donation from $250-$10,000 from the recent crowd-funding appeal. What I gave is between my bank manager and myself. And all stars that spin do so at the same rate, regardless of the amount. Was there a specific point that you wished to make?

No point, just wild assumption.
Grant
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Message 1797779 - Posted: 21 Jun 2016, 15:07:18 UTC - in response to Message 1797619.  

Thank you for correcting me regarding Arecibo tracking capability. But the conclusion stands. To get better sensitivity much longer integration time is needed. That will probably require development of a new receiver, data collection/storage and software for SETI@home, maybe as part of the Breakthrough Initiative.
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Message 1797838 - Posted: 22 Jun 2016, 1:28:16 UTC - in response to Message 1794850.  

G'day Eric,
Instead of the US, why not lobby the Aussie Government. We're still spend bucket loads of money on astronomy, even after some cutbacks. CSIRO just built a massive antenna for the Chinese super-version of Arecibo too.
I don't know of any site they've shut down either. It might be time they got one in Puerto Rico.

If nothing else, it may shame the US Government into picking up its game. ;-)


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Message 1797842 - Posted: 22 Jun 2016, 1:50:16 UTC - in response to Message 1797838.  

G'day Eric,
Instead of the US, why not lobby the Aussie Government. We're still spend bucket loads of money on astronomy, even after some cutbacks. CSIRO just built a massive antenna for the Chinese super-version of Arecibo too.
I don't know of any site they've shut down either. It might be time they got one in Puerto Rico.

If nothing else, it may shame the US Government into picking up its game. ;-)

Our own Parkes Radio Telescope is threatened with closure also due to cut backs in Federal money and that is another planned source of data for use here.

Cheers.
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Message 1798023 - Posted: 22 Jun 2016, 20:40:14 UTC - in response to Message 1794850.  

Of possible use in the discussion:

< https://www.sri.com/blog/arecibo-observatory-50-years-discovery-astronomy-space-and-atmospheric-science >

M. E. Kabay, PhD, CISSP-ISSMP
Norwich University
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Profile Gordon Lowe
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Message 1798623 - Posted: 25 Jun 2016, 11:42:49 UTC - in response to Message 1797628.  

Not to many signing the petition. I bet most people don't know what the Arecibo Observatory does. Maybe add to the description that it also searches for Extraterrestrial signals if we don't get 100,000 signatures.

Just added my signature.

Very few signatures :(


Yeah... poor showing. I'm surprised so few.
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Message 1798984 - Posted: 27 Jun 2016, 14:12:40 UTC - in response to Message 1798623.  

Please provide link to the Petition.

Thanks
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Message boards : News : Arecibo still threatened with closure.


 
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