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 uLiveAndYouBurn
    
Location: Beyond
Anarchocommunist
 |  | Re: Radio Telescope Climbing
<Reply # 20 on 11/5/2009 10:57 PM >
|  | | | Something to keep in mind also is that by climbing on this thing at all you'll ruin the data for whoever is using the telescope at the time. your cell phone, your digital camera, even the electrical charges in your brain are enough to throw off the incoming signals if you're near the receiver.
I was going to climb a huge one in West Virginia, but its not worth fucking up somebody's research in my opinion.
"Aint nothin' to it but to do it"
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\/adder
Location: DunkarooLand
Gender: Male
I'm the worst of the best but I'm in this race.
| |  | Re: Radio Telescope Climbing
<Reply # 21 on 11/6/2009 2:52 AM >
| | | | http://en.wikipedia.org/wiki/Wow!_signal
Mystery Solved!
"No risk, no reward, no fun."
"Go all the way or walk away"
escensi omnis... |
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MindHacker
Location: Suburbs of DC
Gender: Male
If you spot a terrorist arrow, pin it to the wall with your shoulder.
| | Re: Radio Telescope Climbing
<Reply # 22 on 11/6/2009 5:21 AM >
| | | | Posted by uLiveAndYouBurn
...even the electrical charges in your brain are enough to throw off the incoming signals if you're near the receiver.
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Are you sure? I'd think they'd be too faint to show up. I know the telescopes work by amplifying the faint signals, but they usually start off with 100 square feet of faint signals, where as your brain would only have about 1 sqft to bounce into the receiver off of. That said, I'm sure it could be possible. I just love reading about this stuff so if you had a source I'd enjoy taking a look at it.
"That's just my opinion. I would, however, advocate for explosive breaching, since speed and looking cool are both concerns in my job."-Wilkinshire |
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ErkzO
Location: Canberra, Australia
Gender: Male
Australian
| | Re: Radio Telescope Climbing
<Reply # 23 on 11/6/2009 12:19 PM >
| | | | That looks like fun!. Ive think been there before, they are quite big dishes. Good luck not getting caught and getting in! I got no tips sorry, just be calm i guess.
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MIAD
Location: Here and There NSW Australia
Gender: Male
Off The Radar
| | | Re: Radio Telescope Climbing
<Reply # 24 on 11/11/2009 11:06 PM >
| | | | If you can try to climb it when its in a position that it is less likely to be transmitting or receiving. Even if it is in receive only mode, the dish it self is designed to collect and aim all received waves at the receiver (up on the arms) so it can actually have a higher amount of RF energy than what it is receiving, also be aware that it does this even when not "turned on" its due to the physical properties and shape of the dish, they are designed to pick up very weak signals, hence why they are generally isolated. Many don't transmit anyway unless they are used for ranging. Also be aware that the surface of the dish will be charged as a result of the energy it is receiving, so be wary of anything you have that is metal, as a short would likely be lethal.
If you do climb it, be wary of headaches, vision looking very grainy and the most important sign your being exposed to RF energy is you will hear slight clicking sounds, which is from your ear fluids boiling, happens at much lower ratings than a telescope can operate at. The biggest worry would have to be alarms or being noticed, if its the one I am thinking of, it gets lit by lights when its open to tourists, and blackened when operating. It is quite possible that you could climb it successfully, but as for entering the dish, that part may be of questionable value as dsankt has pointed out the risks probably out weigh the rewards
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MindHacker
Location: Suburbs of DC
Gender: Male
If you spot a terrorist arrow, pin it to the wall with your shoulder.
| | Re: Radio Telescope Climbing
<Reply # 25 on 11/12/2009 4:40 AM >
| | | | Posted by MIAD
it can actually have a higher amount of RF energy than what it is receiving, also be aware that it does this even when not "turned on" its due to the physical properties and shape of the dish, they are designed to pick up very weak signals, hence why they are generally isolated.
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That would defy the laws of physics. I think what you meant to say is that the energy will be concentrated above background levels at the collector.
Also be aware that the surface of the dish will be charged as a result of the energy it is receiving, so be wary of anything you have that is metal, as a short would likely be lethal.
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The surface of the dish is designed to reflect, not absorb. And having metal on your doesn't make a difference, you're blood is saltwater, and will conduct fantastically.
the most important sign your being exposed to RF energy is you will hear slight clicking sounds, which is from your ear fluids boiling, happens at much lower ratings than a telescope can operate at.
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1st off: OMFG
2nd off: telescopes can operate with just sensors, no intensification, so that's very obviously full of sh*t even if you kind of knew what you were talking about.
Back to point #1 - the brain absorbs radiation better than your ears, so it would boil first.
Here's what the RF-Safety bulletin says:
What are the Overexposure Symptoms?
• Confusion
• Vertigo
• Headache
• Blurred vision
• Overall nauseous feeling
• Heating
• Bad or metallic taste in mouth
No ear-boiling here. If your ears boil, you're dead.
edit: Kind of knew. I accidentally implied you were on-topic.
[last edit 11/12/2009 4:41 AM by MindHacker - edited 1 times]
"That's just my opinion. I would, however, advocate for explosive breaching, since speed and looking cool are both concerns in my job."-Wilkinshire |
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MIAD
Location: Here and There NSW Australia
Gender: Male
Off The Radar
| | | Re: Radio Telescope Climbing
<Reply # 26 on 11/12/2009 7:56 AM >
| | | | Posted by MindHacker
That would defy the laws of physics. I think what you meant to say is that the energy will be concentrated above background levels at the collector.
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Exactly what I ment, it is designed to concentrate energy at the coelctor, much higher levels if anything is transmitting in the direction its pointed.
Posted by MindHacker
The surface of the dish is designed to reflect, not absorb. And having metal on your doesn't make a difference, you're blood is saltwater, and will conduct fantastically.
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Yes it does reflect, not absorb, but the surface can become charged, as with any large antena, might not be true for something solely designed to receive only, but most high power antennas cause ionizing radiation which does charge the surface or whatever is near it. Coming into contact can cause rather serious burns, or short through metal. I had a nasty burn from coming into contact with an old DN-181 tracking radars receiver whilst in Pasive mode, which is receive only, a radio telescope has a much larger receiving dish, and I would think it would receive much more energy than a small radar dish, though I may be wrong.
Posted by MindHacker
2nd off: telescopes can operate with just sensors, no intensification, so that's very obviously full of sh*t even if you kind of knew what you were talking about.
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They may not physicaly intensify the energy, but they DO FOCUS IT AT THE RECEIVER, sensor or not thats how they receive the signal, its not the dish that is the sensor, its on the arms above, where the energy is focused, hence anywhere inbetween the main reflector and the receiver is likely to have more RF energy than elsewhere as the closer you are to the sensor the more energy that is directly reflected at it, hence worse for you
Posted by MindHacker
Back to point #1 - the brain absorbs radiation better than your ears, so it would boil first.
Here's what the RF-Safety bulletin says:
What are the Overexposure Symptoms?
• Confusion
• Vertigo
• Headache
• Blurred vision
• Overall nauseous feeling
• Heating
• Bad or metallic taste in mouth
No ear-boiling here. If your ears boil, you're dead.
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Very much so, even good you have added more, but whilst I was training on Rapier (radar guided SAM) back 10 years ago, one of the first signs we were always taught to look for were clicking in the ear, nausea, and blurred vision. Just because its not in the RF safety bulletin wherever you are, doesn't mean it doesn't happen. It only occurs during high exposures, and stops as soon as you leave, its true your brain is getting damaged first, but you don't notice that, but you can hear it in your ear and the fluids in your ear are quite easily affected. Not sure how much power these dishes receive, may only be a few watts, which would be reasonably safe, but best to assume otherwise unless you know for certain.
Main thing I was getting at is climbing the structure isn't the worst place to climb, but inside the dish proberbly wouldn't be a good idea, but may not be any problem, I haven't done a radio telescope, but have had experience with operating Radar, although it was a few years back so if you do know better, and can correct me then please do as its not quite the same as what I am experienced in and may have been told some incorrect things at the time.
edit: mostly spelling and grammar
[last edit 11/12/2009 8:44 AM by MIAD - edited 1 times]
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