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SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICE

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MATT..
User ID: 331690
4/3/2008 1:00 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

Found the key Youtube video:

[link to www.youtube.com]

Best one yet!
MATT..
User ID: 331690
4/3/2008 1:04 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

here's the other one:

[link to www.youtube.com]
Anonymous Coward
User ID: 414832
4/14/2008 7:09 AM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

bump
Anonymous Coward
User ID: 423582
4/26/2008 5:41 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

bump
Anonymous Coward
User ID: 407317
4/26/2008 5:46 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

HEAT bump
Anonymous Coward
User ID: 422795
4/26/2008 6:00 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

Bend a sheet of ice and it cracks along a clean, sharp edge. You evidently have no understanding of the physics of hydrogen bonding.
Anonymous Coward
User ID: 423575
4/26/2008 6:36 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

Have we got 4years left here on earth as we know it,2012 very BIG year indeed.
If you do not know how to pray, then start to,we are FUCKED.

[link to uk.youtube.com]
Curablepessimist
User ID: 587309
1/6/2009 1:10 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

I would not expect a Space Based Laser to produce a perfectly straight cut, nor a Plane, for that matter. In fact, such straight line, or a 45 degree angle is EXTREMELY DIFFICULT, Highly unlikely, and of no utility to the ones doing the cutting. AND it's impossible to make a perfectly 90 degree cut for even a short period of time.

A Satellite needs to move at 17,000 mph to stay in orbit. For the 24 hours it'd take to cut even a mile, the satellite would make over ten orbits, depending on it's altitude. You'd see multiple cuts, curves, concatenated segments, that kind of thing.

Now: Water enthalpy requires, oh, probably 80 calories per gram to melt ice. If you have a 60 ft deep cut, and if your beam diverges to 1/2" diameter, that's 4.9 Billion calories per mile, or 20.6 Billion Watt-Seconds per mile of cut. This is assuming phase change ONLY, and not raising the ice temperature if it's initially below freezing, and assuming you could get the water to flow rapidly enough out of the cut. Vsporizing the water into steam would require even far, far more.

You'd need a minimum 1 Billion Watt laser (assuming all the energy gets absorbed by the ice and not reflected by the resulting standing water or steam) to make a 1 mile cut in 20 seconds. Any shorter period would require a proportionally higher level of power. Any longer period would cause a rapid change in the angle of the cut.

To achieve such a tight beam divergence as 1/2" would require an enormous mirror, very visible in the night sky as it orbited. To use a looser beam divergence would require far more power.

To put a Gigawatt continuous wave laser on board a plane would be even harder; That's more than a Million Horsepower of continuous power; More likely 10 million HP for even an unrealistically high 10% laser efficiency.

If 'they' wanted to keep it secret, it'd be easier to make a jagged cut.

Peace

Curablepessimist


[link to www.school-for-champions.com]
Curablepessimist
User ID: 587309
1/6/2009 1:10 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

I would not expect a Space Based Laser to produce a perfectly straight cut, nor a Plane, for that matter. In fact, such straight line, or a 45 degree angle is EXTREMELY DIFFICULT, Highly unlikely, and of no utility to the ones doing the cutting. AND it's impossible to make a perfectly 90 degree cut for even a short period of time.

A Satellite needs to move at 17,000 mph to stay in orbit. For the 24 hours it'd take to cut even a mile, the satellite would make over ten orbits, depending on it's altitude. You'd see multiple cuts, curves, concatenated segments, that kind of thing.

Now: Water enthalpy requires, oh, probably 80 calories per gram to melt ice. If you have a 60 ft deep cut, and if your beam diverges to 1/2" diameter, that's 4.9 Billion calories per mile, or 20.6 Billion Watt-Seconds per mile of cut. This is assuming phase change ONLY, and not raising the ice temperature if it's initially below freezing, and assuming you could get the water to flow rapidly enough out of the cut. Vsporizing the water into steam would require even far, far more.

You'd need a minimum 1 Billion Watt laser (assuming all the energy gets absorbed by the ice and not reflected by the resulting standing water or steam) to make a 1 mile cut in 20 seconds. Any shorter period would require a proportionally higher level of power. Any longer period would cause a rapid change in the angle of the cut.

To achieve such a tight beam divergence as 1/2" would require an enormous mirror, very visible in the night sky as it orbited. To use a looser beam divergence would require far more power.

To put a Gigawatt continuous wave laser on board a plane would be even harder; That's more than a Million Horsepower of continuous power; More likely 10 million HP for even an unrealistically high 10% laser efficiency.

If 'they' wanted to keep it secret, it'd be easier to make a jagged cut.

Peace

Curablepessimist


[link to www.school-for-champions.com]
Curablepessimist
User ID: 587309
1/6/2009 1:11 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

I would not expect a Space Based Laser to produce a perfectly straight cut, nor a Plane, for that matter. In fact, such straight line, or a 45 degree angle is EXTREMELY DIFFICULT, Highly unlikely, and of no utility to the ones doing the cutting. AND it's impossible to make a perfectly 90 degree cut for even a short period of time.

A Satellite needs to move at 17,000 mph to stay in orbit. For the 24 hours it'd take to cut even a mile, the satellite would make over ten orbits, depending on it's altitude. You'd see multiple cuts, curves, concatenated segments, that kind of thing.

Now: Water enthalpy requires, oh, probably 80 calories per gram to melt ice. If you have a 60 ft deep cut, and if your beam diverges to 1/2" diameter, that's 4.9 Billion calories per mile, or 20.6 Billion Watt-Seconds per mile of cut. This is assuming phase change ONLY, and not raising the ice temperature if it's initially below freezing, and assuming you could get the water to flow rapidly enough out of the cut. Vsporizing the water into steam would require even far, far more.

You'd need a minimum 1 Billion Watt laser (assuming all the energy gets absorbed by the ice and not reflected by the resulting standing water or steam) to make a 1 mile cut in 20 seconds. Any shorter period would require a proportionally higher level of power. Any longer period would cause a rapid change in the angle of the cut.

To achieve such a tight beam divergence as 1/2" would require an enormous mirror, very visible in the night sky as it orbited. To use a looser beam divergence would require far more power.

To put a Gigawatt continuous wave laser on board a plane would be even harder; That's more than a Million Horsepower of continuous power; More likely 10 million HP for even an unrealistically high 10% laser efficiency.

If 'they' wanted to keep it secret, it'd be easier to make a jagged cut.

Peace

Curablepessimist


[link to www.school-for-champions.com]
Anonymous Coward
User ID: 579266
1/6/2009 1:13 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

Does this mean that Amitakh Stanford was right? (...on aliens working at Antarctica...)
Anonymous Coward
User ID: 587227
1/6/2009 1:27 PM
Re: SPACE-BASED LASER BEING USED TO DELIBERATELY CUT MASSIVE ANTARCTIC ICEQuote

For a fuckwit that claims to be in the Navy, I would think that you already knew military planes could do this. Oh wait, maybe it's the air force that has this capability, we use people like you to keep ship decks nice and shiny. Keep scrubbing biatch


Nah, I'm a mechanical engineer. I don't doubt we have the ability to make a laser that can cut ice, but the problem with making cuts 45 miles long is power. What can generate continuous power for that long at that intensity?
 Quoting: The Guy


a relly hot necular fission generator.
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