| Page 1 of 2 | 1 | 2 |
|
|
Biggest antenna ever constructed
?
|
Chris wrote:
? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- |
Chris didn't write:
Biggest antenna ever constructed? Maybe http://www.naic.edu/public/the_telescope.htm ? 73, -- Fabian Kurz, DJ1YFK * Dresden, Germany * http://fkurz.net/ |
Fabian Kurz wrote: Chris didn't write: Biggest antenna ever constructed? Maybe http://www.naic.edu/public/the_telescope.htm ? Or maybe this one: http://www.haarp.alaska.edu/ ac6xg |
"Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. But as an 'effective' antenna what about that line of dishes on tracks near Cambridge that ISTR is equivalent to a dish 3 miles across! -- Woody harrogate2 at ntlworld dot com |
In article ,
harrogate2 wrote: Ariceibo? As a single antenna, probably. But as an 'effective' antenna what about that line of dishes on tracks near Cambridge that ISTR is equivalent to a dish 3 miles across! Even bigger-effective-aperture telescope systems use very-long- baseline interferometry to combine the signals from multiple receivers spread out all across the planet, and even on satellites. There are some VLBI systems using satellites in earth orbit, and I believe that there are plans (or even systems in existence) which use satellites in solar orbit. The angular resolution you can get from these systems is sorta scary. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
"Chris" wrote in message ... ? If you exclude various multi dish arrays then the biggest is Arecibo radio telescope in Puerto Rico. |
"harrogate2" wrote in message ... "Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. Arecibo remains the largest fixed antenna. The largest steerable is DSN... 70 m ham : probably the low band beam used by JARL ? 73 Thierry http://www.astrosurf.org/lombry But as an 'effective' antenna what about that line of dishes on tracks near Cambridge that ISTR is equivalent to a dish 3 miles across! -- Woody harrogate2 at ntlworld dot com |
The Moon
Amateurs use it frequently as a passive reflector Constructed about 4.5 billion years ago Builder GØD -- CL -- I doubt, therefore I might be ! "Chris" wrote in message ... ? |
Caveat Lector wrote:
The Moon Amateurs use it frequently as a passive reflector Constructed about 4.5 billion years ago Builder GØD God must have missed a design principle in electromagnetics. The moon is a convex surface more suited to scattering than concave which is more suited to focusing ... or is it the other way around? |
On Wed, 18 May 2005 18:42:43 -0400, Ham op wrote:
The moon is a convex surface more suited to scattering than concave which is more suited to focusing Aim for a big crater. |
On Wed, 18 May 2005 19:17:01 +0100, "Chris" wrote:
For a single antenna located at a single site, maybe NAA at Cutler, Maine. I've seen this at it is awesome. WWVL was pretty awesome too. However, some of the ELF stuff is much bigger. I heard that there was (is) one on the UP of Michigan that is underground, so who knows how big it might be. The tree huggers kept cutting down the poles that supported the above ground versions. If you're talking height then it's KVLY's tower. 2063', the tallest manmade structure on the planet http://www.kvlytv11.com/info_tower.html Been there too. |
On 18 May 2005 17:50:20 -0700, "HAARP Microwave Beam"
wrote: HAARP antennae? go to http://haarp-microwave.tripod.com/haarp.html to see what billions of money is going into this weapons program! You're using the NY Times as a source with the word HAARP "judiciously" inserted? Bafflegab. |
In article ,
"Chris" wrote: ? i think it was the array the military built for a super duper VLF submarine communicator designed to go basically thru the earth it has a truly amazing ammount of total antenna miles and the power is even more amazing forgot what it's called but if someone knows and u google it, really cool story and pix abound there are a few simular, but one in particular is much bigger then it's siblings by order of magnatudes |
Negative. I worked at the "other" ELF site in WI. All the ELF antennas
were above ground. Each antenna was about 13 miles long. The ELF transmitters shut down several months ago and the site equipment and antennas are being removed. Scott Wes Stewart wrote: On Wed, 18 May 2005 19:17:01 +0100, "Chris" wrote: For a single antenna located at a single site, maybe NAA at Cutler, Maine. I've seen this at it is awesome. WWVL was pretty awesome too. However, some of the ELF stuff is much bigger. I heard that there was (is) one on the UP of Michigan that is underground, so who knows how big it might be. The tree huggers kept cutting down the poles that supported the above ground versions. If you're talking height then it's KVLY's tower. 2063', the tallest manmade structure on the planet http://www.kvlytv11.com/info_tower.html Been there too. |
The ELF antennas in Michigan and Wisconsin were bigger than 70M. Each
was 13 miles long. Wisconsin had 2 antennas and the Michigan site had 3 antennas. The patterns were steerable electronically by changing the current phases. Simple stuff. I used to work there. Scott Thierry wrote: "harrogate2" wrote in message ... "Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. Arecibo remains the largest fixed antenna. The largest steerable is DSN... 70 m ham : probably the low band beam used by JARL ? 73 Thierry http://www.astrosurf.org/lombry But as an 'effective' antenna what about that line of dishes on tracks near Cambridge that ISTR is equivalent to a dish 3 miles across! -- Woody harrogate2 at ntlworld dot com |
It was called ELF (Extremely Low Frequency). Yes, lots of power but the
antennas were so short compared to a wavelength at the frequencies used, and therefore pretty lossy, the ERP was about 4 Watts. But, it worked splendidly. They pulled the plug on ELF a few months ago and are dismantling it all...I used to work there in the 1990s and it was a very interesting setup. How many people worldwide can say they have ELF experience? ;) Scott ml wrote: In article , "Chris" wrote: ? i think it was the array the military built for a super duper VLF submarine communicator designed to go basically thru the earth it has a truly amazing ammount of total antenna miles and the power is even more amazing forgot what it's called but if someone knows and u google it, really cool story and pix abound there are a few simular, but one in particular is much bigger then it's siblings by order of magnatudes |
Jim Kelley wrote:
Fabian Kurz wrote: Chris didn't write: Biggest antenna ever constructed? Maybe http://www.naic.edu/public/the_telescope.htm ? Or maybe this one: http://www.haarp.alaska.edu/ ac6xg Pine Gap is one of the largest , 26 Dishes , but its a spook thing. |
On Wed, 18 May 2005 16:19:58 -0700, Wes Stewart
wrote: On Wed, 18 May 2005 19:17:01 +0100, "Chris" wrote: For a single antenna located at a single site, maybe NAA at Cutler, Maine. I've seen this at it is awesome. WWVL was pretty awesome too. However, some of the ELF stuff is much bigger. I heard that there was (is) one on the UP of Michigan that is underground, so who knows how big it might be. The tree huggers kept cutting down the poles that supported the above ground versions. If you're talking height then it's KVLY's tower. 2063', the tallest manmade structure on the planet http://www.kvlytv11.com/info_tower.html Been there too. Hi Wes, I've been here too: http://eyeball.sabotage.org/jcrs-eyeball.htm Which is only 30 miles or so up the road. The last image, scroll right, shows the bird's eye view, but it is impossible to make out the cabling (that follows in the last link below, a big power point file). NLK 24.8KHz 192/250KW from http://amrad.org/pipermail/lf/2001q2/001051.html The antenna at Jim Creek (a U.S. Navy LF communications site). The size of this station was a revelation to me. The antenna consisted of ten copperweld cables 8,000 feet long strung across a narrow valley between two ridges 3,000 feet high. The centers of these strands were connected to downleads that were brought together into a sort of transmission line that carried them back to the transmitter building. The antenna was actually separated into two halves, each excited by its own transmitter, so that in case of accident or the need for maintenance the station could operate at half-power for a time. The transmitter building was a concrete box a hundred feet or so square without windows and with access to the area of the transmitter itself only by elevator from below. As befitted a station with a transmitter whose component sections were mostly of the order of cubes ten feet on a side, the elevator was so big that we simply drove our truck into it for the ride up to the operating level, We spent two or three days setting up our equipment and erecting a whip antenna for receiving the signal from Criggion. As the transmitter building was the only possible site for our gear in the immediate vicinity, the whip was installed on the roof about fifty feet from the "lead-in" which carried about 700 amperes of radio-frequency current. It was in setting up this antenna that we discovered the falsity of the common statement that "r.f. doesn't shock; it simply produces surface burns". This may be the truth for small quantities as high-frequency currents tend to flow only on the surface of a conductor, but it fails by a wide margin to explain the behavior of large currents at such a low frequency as Jim Creek's. Our rough calibration of the field strength near the transmitter lead-in was as follows: a bit of metal up to five or six inches long (such as a screwdriver or a pair of pliers) stings like a nettle; rubber gloves are a necessity for handling metal objects a foot or two long; and touching a conductor five or six feet long can knock one down. There are various descriptions of antenna, frequency, and power that is undoubtedly due to mission changes over the years. I've seen Jim Creek specified at a frequency as low as 18KHz with powers ranging from hundreds of KW to 1 MW. It is hard to tell if those specifications are for driven power or radiated power as antenna efficiencies are decidedly lucky to break 50%. The most recent top hat design is illustrated at: http://www.aavso.org/aavso/meetings/...esent/howe.ppt which in a rough description is composed of 12 spans with 12 down leads (bus fed); with the top hat dimension of one square mile. From rough calculations, feedpoint R appears to be on the order of 2 Ohms. 73's Richard Clark, KB7QHC |
On Wed, 18 May 2005 20:18:34 -0700, Richard Clark
wrote: I've been here too: http://eyeball.sabotage.org/jcrs-eyeball.htm Which is only 30 miles or so up the road. The last image, scroll right, shows the bird's eye view, but it is impossible to make out the cabling (that follows in the last link below, a big power point file). NLK 24.8KHz 192/250KW from http://amrad.org/pipermail/lf/2001q2/001051.html The antenna at Jim Creek (a U.S. Navy LF communications site). The size of this station was a revelation to me. The antenna consisted of ten copperweld cables 8,000 feet long strung across a narrow valley between two ridges 3,000 feet high. The centers of these strands were connected to downleads that were brought together into a sort of transmission line that carried them back to the transmitter building. The antenna was actually separated into two halves, each excited by its own transmitter, so that in case of accident or the need for maintenance the station could operate at half-power for a time. The transmitter building was a concrete box a hundred feet or so square without windows and with access to the area of the transmitter itself only by elevator from below. As befitted a station with a transmitter whose component sections were mostly of the order of cubes ten feet on a side, the elevator was so big that we simply drove our truck into it for the ride up to the operating level, We spent two or three days setting up our equipment and erecting a whip antenna for receiving the signal from Criggion. As the transmitter building was the only possible site for our gear in the immediate vicinity, the whip was installed on the roof about fifty feet from the "lead-in" which carried about 700 amperes of radio-frequency current. It was in setting up this antenna that we discovered the falsity of the common statement that "r.f. doesn't shock; it simply produces surface burns". This may be the truth for small quantities as high-frequency currents tend to flow only on the surface of a conductor, but it fails by a wide margin to explain the behavior of large currents at such a low frequency as Jim Creek's. Our rough calibration of the field strength near the transmitter lead-in was as follows: a bit of metal up to five or six inches long (such as a screwdriver or a pair of pliers) stings like a nettle; rubber gloves are a necessity for handling metal objects a foot or two long; and touching a conductor five or six feet long can knock one down. There are various descriptions of antenna, frequency, and power that is undoubtedly due to mission changes over the years. I've seen Jim Creek specified at a frequency as low as 18KHz with powers ranging from hundreds of KW to 1 MW. It is hard to tell if those specifications are for driven power or radiated power as antenna efficiencies are decidedly lucky to break 50%. The most recent top hat design is illustrated at: http://www.aavso.org/aavso/meetings/...esent/howe.ppt which in a rough description is composed of 12 spans with 12 down leads (bus fed); with the top hat dimension of one square mile. From rough calculations, feedpoint R appears to be on the order of 2 Ohms. 73's Richard Clark, KB7QHC Here a similar (web)site for NAA: http://web.elastic.org/~fche/mirrors...er-eyeball.htm In the last image the shadows cast by the towers are easily visible. I'm sure I've mentioned this before but our radio club once had a speaker who was a Navy Reservist who did a summer tour at NAA. He had a slide show that was really interesting. Of particular interst to me was the fact that (at that time anyway) the top hat was "spring loaded" and allowed to move about under ice/wind loading. The "springs" were massive concrete block weights that rode up and down inclined tracks on the outer ring of towers. One other interesting thing was that when they used FSK, the antenna was retuned between mark and space. |
"Chris" wrote in :
? The Planet Earth. |
In message 42, Sarco
writes "Chris" wrote in : ? The Planet Earth. The Sun. Mike -- M.J.Powell |
ml wrote: In article , "Chris" wrote: ? i think it was the array the military built for a super duper VLF submarine communicator designed to go basically thru the earth it has a truly amazing ammount of total antenna miles and the power is even more amazing forgot what it's called but if someone knows and u google it, really cool story and pix abound Project Sanguine |
"Chris" wrote in message ... ? the moon as a reflector |
"Scott" wrote in message ... The ELF antennas in Michigan and Wisconsin were bigger than 70M. Each was 13 miles long. Wisconsin had 2 antennas and the Michigan site had 3 antennas. The patterns were steerable electronically by changing the current phases. Simple stuff. I used to work there. For sure that any ELF system, due to the wavelengths used will be always very loo-ong and the longest system. In this context we can also speak about HFGW and space VLBI. But speaking in term of HF and microwaves, Arecibo and DSN remains the largest. All depend on what frequency bands are concerned. Thierry, ON4SKY Scott Thierry wrote: "harrogate2" wrote in message ... "Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. Arecibo remains the largest fixed antenna. The largest steerable is DSN... 70 m ham : probably the low band beam used by JARL ? 73 Thierry http://www.astrosurf.org/lombry But as an 'effective' antenna what about that line of dishes on tracks near Cambridge that ISTR is equivalent to a dish 3 miles across! -- Woody harrogate2 at ntlworld dot com |
atec wrote: Pine Gap is one of the largest , 26 Dishes , but its a spook thing. Sounds like they collected the whole set! ac6xg Beware of the Antennaphobes |
Project Sanguine was the prototype built in the 50s or 60s in Clam Lake,
WI. Mothballed after the test transmitter was built. When the project was rekindled in the 1980s, it was simply called Project ELF. Scott Bill wrote: ml wrote: In article , "Chris" wrote: ? i think it was the array the military built for a super duper VLF submarine communicator designed to go basically thru the earth it has a truly amazing ammount of total antenna miles and the power is even more amazing forgot what it's called but if someone knows and u google it, really cool story and pix abound Project Sanguine |
"M. J. Powell" wrote in
: In message 42, Sarco writes "Chris" wrote in : ? The Planet Earth. The Sun. Mike The Sun for transmission, and the earth for reception :) Scott |
On Wed, 18 May 2005 19:30:50 GMT, "harrogate2"
wrote: "Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. But as an 'effective' antenna what about that line of dishes on tracks near Cambridge that ISTR is equivalent to a dish 3 miles across! Bigger maybe? -- http://www.aoc.nrao.edu/ |
Roger Conroy wrote:
"Chris" wrote in message ... ? If you exclude various multi dish arrays then the biggest is Arecibo radio telescope in Puerto Rico. I think you will find some vlf arrays which dwarf it. |
Scott wrote:
Gotcha...that explains it. I personally thought HAARP was a neat concept, especially for hams...man-made aurora!! :) Not sure if they're still doing research with it or not. Their website seems a bit dated. I copied their test transmission back in 1999 I think it was...pretty nifty! Scott N0EDV Art Deco wrote: Scott wrote: Huh? Maybe we're all talking about different HAARPs. The HAARP I thought was being discussed is at http://www.haarp.alaska.edu/ You are correct; the experiment has attracted every end-of-the-world gloom-and-doom conspiracist on the planet, especially on usenet. One well-known kook even claimed that HAARP was responsible for the loss of Columbia. Thus my comment that any thread with 'HAARP' in the subject line is from a kook (well, at least a 99% chance). Scott Art Deco wrote: HAARP Microwave Beam wrote: HAARP antennae? go to http://haarp-microwave.tripod.com/haarp.html to see what billions of money is going into this weapons program! Note: using the acronym "HAARP" in a post subject line is an automatic kooksign. This should indicate that HAARP is still in bsuiness as a scientific operation. Given the, rather mild for a Haarp item, 'informed' and 'rational' responses I see on this and other newsgroups I would assume they keep a very low profile and are not really outgoing or incoming. The site cited (always wanted to say that) shows you pictures and gives points of access for more information. http://www.livescience.com/technolog...ight_show.html First Artificial Neon Sky Show Created By Robert Roy Britt LiveScience Senior Writer posted: 02 February 2005 02:12 pm ET By shooting intense radio beams into the night sky, researchers created a modest neon light show visible from the ground. The process is not well understood, but scientists speculate it could one day be employed to light a city or generate celestial advertisements. Researchers with the High Frequency Active Auroral Research Program (HAARP) project in Alaska tickled the upper atmosphere to the extent that it glowed with green speckles. The speckles were sprinkled amid a natural display known as the aurora borealis, or Northern Lights. The aurora occurs when electrons from a cloud of hot gas, known as plasma, rain down from space and excite molecules in the ionosphere, about 30 miles (50 kilometers) up. The HAARP experiment involves acres of antennas and a 1 megawatt generator. The scientists sent radio pulses skyward every 7.5 seconds, explained team leader Todd Pederson of the Air Force Research Laboratory. "The radio waves travel up to the ionosphere, where they excite the electrons in the plasma," Pederson told LiveScience. "These electrons then collide with atmospheric gasses, which then give off light, as in a neon tube." Pederson and his colleagues missed the show, but they snapped images. "We unfortunately were indoors watching the data on monitors during the experiment and were busy scrambling trying to make sure the effects were real and not some glitch with the equipment," he said. "We knew right away it was something extraordinary to show up in real time on the monitor against the natural aurora, but did not confirm that it would have been visible to the naked eye until a day or two later when we had a chance to calibrate the raw data." The experiment is detailed in the Feb. 2 issue of the journal Nature. The research could improve understanding of the aurora and also help explain how the ionosphere adversely affects radio communications. It is not yet clear if the aurora must already be active before an artificial sky show can be induced, says Karl Ziemelis, chief physics editor at the journal. If no pre-existing aurora is required, Ziemelis said, "we are left with the tantalizing (some would say disconcerting) possibility that such radio-fuelled emissions could form the basis of a technology for urban lighting, celestial advertising, and more." |
Thierry - wrote:
"harrogate2" wrote in message ... "Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. Arecibo remains the largest fixed antenna. The largest steerable is DSN... 70 m Jodrell Bank is 250 foot or 76.2m. -- Peter |
The last time I was there, the U. of Manchester's big antenna at Jodrell
Bank was "steerable." Perhaps you are thinking of another antenna. Only the feed at Arecibo can be moved. 73 Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: "Wes Stewart" wrote in message ... On Sat, 21 May 2005 19:47:24 snip As a single antenna, probably. Arecibo remains the largest fixed antenna. The largest steerable is DSN... 70 m Jodrell Bank is 250 foot or 76.2m. Arecibo is steerable. |
On Sat, 21 May 2005 16:36:54 -0400, "J. Mc Laughlin"
wrote: The last time I was there, the U. of Manchester's big antenna at Jodrell Bank was "steerable." Perhaps you are thinking of another antenna. No. Only the feed at Arecibo can be moved. Uh huh. But that moves the beam around. :) A lot of satellite receivers use fixed reflectors with multiple feeds to look at different satellites. A lot of search and fire control radars also use "fixed" planar antennas with electronic beam steering. I submit that all of these are "steerable." Regards, Wes |
Dear Mr. Wes Stewart:
I do not see anything in your last message that I disagree with. I have seen the U. of Manchester's antenna move so as to move its beam. 73, Mac N8TT -- J. Mc Laughlin; Michigan U.S.A. Home: "Wes Stewart" wrote in message ... On Sat, 21 May 2005 16:36:54 -0400, "J. Mc Laughlin" wrote: The last time I was there, the U. of Manchester's big antenna at Jodrell Bank was "steerable." Perhaps you are thinking of another antenna. No. Only the feed at Arecibo can be moved. Uh huh. But that moves the beam around. :) A lot of satellite receivers use fixed reflectors with multiple feeds to look at different satellites. A lot of search and fire control radars also use "fixed" planar antennas with electronic beam steering. I submit that all of these are "steerable." Regards, Wes |
Dave Holford wrote:
Art Deco wrote: According to an Alaskan local who is a friend of mine, HAARP has almost no funding anymore from DoD, the guards at the front gate spend their time watching cable TV. HAARP is turned on occasionally as a teaching facility for the Univ. of Alaska. I recall reading a couple of magazine articles some years ago when HAARP was active; and in both of them the writers reported the gate was open and there was no one at the gate. I recall one of the writers wandered around until he found someone in a building who showed him around - there were some great photos of the 'huge' antenna system. Dave It must be like that drive-in movie used in "Spies Like Us" or that dry cleaners the 15,000 employees of "The Man from U.N.C.L.E". Tricky part is covering up all the tire tracks the hundreds of employees make when they drive through the snow. http://www.haarp.alaska.edu/haarp/cam.fcgi This is a picture from the HAARP cam, all white, must be snowing. This is a pro-Haarp site http://www.guerrillacampaign.com/Hugh.htm and the power given is less than a megawatt, about what a small UHF TV station might put out, the big ones do 2000 kW. and this is the best satellite image from maps.google http://maps.google.com/maps?q=Gakona...2400&t=k&hl=en |
Jack Linthicum wrote: Dave Holford wrote: Art Deco wrote: According to an Alaskan local who is a friend of mine, HAARP has almost no funding anymore from DoD, the guards at the front gate spend their time watching cable TV. HAARP is turned on occasionally as a teaching facility for the Univ. of Alaska. I recall reading a couple of magazine articles some years ago when HAARP was active; and in both of them the writers reported the gate was open and there was no one at the gate. I recall one of the writers wandered around until he found someone in a building who showed him around - there were some great photos of the 'huge' antenna system. Dave It must be like that drive-in movie used in "Spies Like Us" or that dry cleaners the 15,000 employees of "The Man from U.N.C.L.E". Tricky part is covering up all the tire tracks the hundreds of employees make when they drive through the snow. http://www.haarp.alaska.edu/haarp/cam.fcgi This is a picture from the HAARP cam, all white, must be snowing. This is a pro-Haarp site http://www.guerrillacampaign.com/Hugh.htm and the power given is less than a megawatt, about what a small UHF TV station might put out, the big ones do 2000 kW. and this is the best satellite image from maps.google http://maps.google.com/maps?q=Gakona...2400&t=k&hl=en This is a pretty chatty source from when it was still under construction: http://www.haarp.alaska.edu/haarp/haarpFactSheet.html |
In article ,
Wes Stewart wrote: On Sat, 21 May 2005 19:47:24 +0100, (Peter Hayes) wrote: Thierry - wrote: "harrogate2" wrote in message ... "Cecil Moore" wrote in message ... Chris wrote: ? Ariceibo? -- 73, Cecil http://www.qsl.net/w5dxp ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= East/West-Coast Server Farms - Total Privacy via Encryption =--- As a single antenna, probably. Arecibo remains the largest fixed antenna. The largest steerable is DSN... 70 m Jodrell Bank is 250 foot or 76.2m. Arecibo is steerable. Actually it is slightly steerable...just over about 15 degrees of vertical, and the antenna gain drops off, quickly as the the angle leaves vertical. This is due to the movement of the Feed Horn Assembly offcenter on its Trolly Wire Supports. Me |
In article .com,
"Jack Linthicum" wrote: http://maps.google.com/maps?q=Gakona...1238&spn=0.025 578,0.042400&t=k&hl=en This is a pretty chatty source from when it was still under construction: http://www.haarp.alaska.edu/haarp/haarpFactSheet.html News Flash....HAARP is still under construction...... as the final array will not be finished and powered until 2006...... Me |
| All times are GMT +1. The time now is 05:30 AM. |
|
Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
RadioBanter.com