Arecibo Upgrade?

[HayHauler]

Nice Read

Click on the "Complete Story" link.

Enjoy,
Hay..

 

[Smoke]

Thanks for the link, Hay.

That was an interesting read.

 

[Assimilator1]

Thanks for the link , a good read

Anyone remember the power of that signal sent? ,I recall it was an insane amount but thats it!

 

[dmcowen674]

Originally posted by: Assimilator1
Thanks for the link , a good read

Anyone remember the power of that signal sent? ,I recall it was an insane amount but thats it!

I remember that the focal point of the signal as far as it's intensity was supposedly brighter than the Sun when seen from afar.

140 Employees??? Are they hiring? Maybe a move to Puerto Rico is in order?

 

[HayHauler]

As far as the power is concerned, the ERP(Effective Radiated Power) of an antenna depends on the amount of input power X the Gain of the antenna. I have not seen any stats on just how much gain the dish has, but it must be ASTRONOMICAL! !

Hay

 

[SirUlli]

The Arecibo L-band Feed Array (ALFA) is a seven feed system that will allow large-scale surveys of the sky to be conducted with unprecedented sensitivity using the 305-m Arecibo telescope in Puerto Rico. The NAIC Arecibo Observatory telescope, operated by Cornell University for the National Science Foundation, is the largest and most sensitive single dish radio telescope in the world and is used to study large numbers of sources that are too faint to be seen with other telescopes. In the past, use of the telescope as a survey instrument has been limited by the relatively small field of view in a single observation. ALFA, operating near 1.4 GHz, will consist of a cluster of seven cooled dual-polarization feeds, a fiber-optical transmission system, and digital back-end signal processors. The system will enable deep surveys for a variety of objects in the Milky Way Galaxy and of other galaxies for probing cosmology. As such, the multibeam system will have a broad appeal to astronomers from all over the world.

ALFA

regards
Sir Ulli

 

[Intelligence3]

Good linky. Thanks.

 

[Bleep]

As far as the power is concerned, the ERP(Effective Radiated Power) of an antenna depends on the amount of input power X the Gain of the antenna. I have not seen any stats on just how much gain the dish has, but it must be ASTRONOMICAL

Antenna gain is somehow misunderstood. The gain is not in power but in directibility, or radiation pattern. even a straight wire antenna has a gain because it directs the signal into 4 directions in the shape of a 4 leaf clover if itis fed in the center. It is like a flashlight bulb and you just light it up in the open and measure the effect at a distance it will be very dim but when you put a reflector ( parabolic mirror) the light is focused in one direction thus a gain is made in one direction because it is concentrated in one direction.

Bleep

 

[HayHauler]

Yes, Bleep, gain is obtained by "focusing" the input power in a tight pattern in ideally one direction. Arecibo is
focusing it's 305 meter dish in one direction. In Arecibo's case, it's power to focus on such a small section of the
universe, allows it to "hear" very deep into space. Earlier, I thought someone was speaking of transmitting at Arecibo.

Hay

 

[Bleep]

Well no matter which way transmitting or recieving the gain of the antenna is still the same. The problem with the recieving end is the noise is also amplified along with the internal noise generated by the electircal stuff in the recievers and amplifiers.
The electronics down there are amazing, the engineering on the dish itself is something to behold. We need about 3 of these around the world and array them together.

Bleep

 

[HayHauler]

Wouldn't it be great if they could figure out a way to "rotate" the dish other
than just moving the feed horn?

Hay

 

[dmcowen674]

Well no matter which way transmitting or recieving the gain of the antenna is still the same. The problem with the recieving end is the noise is also amplified along with the internal noise generated by the electircal stuff in the recievers and amplifiers.
The electronics down there are amazing, the engineering on the dish itself is something to behold. We need about 3 of these around the world and array them together.

Bleep

Originally posted by: HayHauler
Wouldn't it be great if they could figure out a way to "rotate" the dish other
than just moving the feed horn?

Hay

They will be combining multiple sources around the planet. Also look up the Allen array in California. It is a field of dishes that "move" via electronics.

Microsoft Founder, Former CTO to Help Finance SETI Radio Array

I don't know if this ever got built.

 

[Assimilator1]

An old book I have (not here unfortunately) called 'Atlas of the Solar system' quotes in their the power of the signal sent in Mw (Mega watts) ,just wish I could remember how much!