Monday, November 29, 2010

High-Tech Border Patrol: 5 New Tricks to Find Smuggler Tunnels

Popular Mechanics
By:JOE PAPPALARDO

The Department of Homeland Security says tunnels under the U.S.-Mexico border are proliferating as security is tightened aboveground. The solution? A sensor network that peers through dirt and rock. The technologies to build it are being developed with funding from the department’s advanced research wing. Here are the most promising contenders.

Ground Penetrating Radar
* How It's Done: GPR uses pulses of radio-frequency energy to see beneath the surface. In commercial use since the 1970s, it is today's standard for detecting voids such as caves and tunnels.
* Who's Working on It: GPR is widely used in quality-testing roads, and to find unmarked graves, locate utility lines, trace subsurface geology, sweep for mines and search archaeological sites.
* What the Limits Are: This method does not work well in moist mediums like clay and rarely penetrates deeper than 40 ft. Officials say that false alarms even at shallow depths waste time and money.

Seismic Waves
* How It's Done: The way that vibrations just under the surface change as they pass through rock and dirt provides details about what's below, and can show the presence of a tunnel.
* Who's Working on It: Researchers from the U.S. Army and Kansas Geological Survey in 2006 analyzed tunnel detection methods using seismic sensors in Kansas and along the U.S.-Mexico border in California.
* What the Limits Are: To create real-time detectors, more powerful imaging software must be developed to filter out the waves' reactions to natural and man-made noises, such as wind and highway traffic.

Electrical Resistivity
* How It's Done: Electrical currents can't leap across empty space at low voltages. Metal electrodes staked in the ground could form a remotely monitored system that would tell solid rock from a void.
* Who's Working on It: While refusing to disclose its customers, Advanced Geosciences staff say the company has been approached by governments, including the U.S., to learn more.
* What the Limits Are: A wide-ranging network would be expensive and would have to be hidden or disguised to avoid tampering.

Microgravity
* How It's Done: When underground soil is removed, it causes very subtle changes in the Earth's gravitational field. Lower gravity readings can indicate a tunnel.
* Who's Working on It: In 2006 Western Kentucky University researchers field-tested robots in Texas studded with microgravity sensors to promote the concept of a mobile, deployable system.
* What the Limits Are: Very high precision is required. The gravity differential for smuggling tunnels can be as slight as 10 microgals--measured against the Earth's field of 100 million microgals.

Cosmic Rays
* How It's Done: Muons are subatomic particles created by cosmic rays hitting the Earth's atmosphere. The number of them detected underground varies with the mass above: If there's a tunnel, more muons are found.
* Who's Working on It: Aside from a 1990 study by the U.S. Army, little research has been focused on this method. However, in 2006 a 12-year-old in San Diego converted two Geiger counters into a weak tunnel detector.
* What the Limits Are: A large number of costly detectors, buried beneath the probable paths of illicit tunnels, would be needed. (Small detectors find few muons and therefore have low resolutions.)

3 comments:

  1. Let's see....? The Department of Homeland Security? Isn't that the group of Pentagon welfare-ites that always finds mentally retarded victims to persecute to justify their monstrous and gargantuan budget and continued National Security State presence in our patria?

    'The Department of Homeland Security says tunnels under the U.S.-Mexico border are proliferating as security is tightened aboveground.'

    You gotta love the patsy they came up with in Oregon, Mohamed O. Mohamud, to present to us for their own sadistic masturbatory pleasures. They must have trolled the whole country with their nets for months to come up with this poor pathetic Somali background dope to rail into prison for life. They gave him the idea, gave him the bomb, then showed him under direct Homeland Insecurity direction how to blow it up as practice. Then they arrested him! Who's dumber than Mohamed? Perhaps the Green Light-Yellow Light-Red Light specialists out there at Tardsville Home Office.... uh, I mean the Department of Homeland Stupidity?????

    Heil Cheney!

    Ernest1

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  2. This means that its easy to find tunnels?

    ReplyDelete
  3. Who stands to make lots of money from the development of "tunnel sensing" equipment? Not to mention the training of personnel who will operate said equipment? As far as tightened "above ground" security, that seems to be working so well that CBP caught Willie Nelson with 6 ounces of pot a few days ago. Oh yeah, I feel much safer. NOT!

    ReplyDelete

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