Ground Penetrating Radar The Unique Applications

While The Most Ideal Application is Locating Voids and Utilities, GPR Goes Above and Beyond

When used in unison with the standard Ground Penetrating Radar equipment, equipment such as leak detectors, electromagnetic induction, and the like allow technicians to discover leaking pipes, trace and map utility lines with GPS, assist in archaeological digs, assess changes in the environment (soil contamination), and assist law enforcement without destroying evidence, among many others.


When Ground Penetrating Radar (GPR) is used with Electromagnetic Induction, technicians are able to assist archaeologists with digs. Using non-invasive techniques, historic sites can be ‘uncovered’ simply by utilizing these imaging systems. The crucial part of all of this is that these historic sites remain underground and protected.

Most recently, scientists, with the assistance of GPR technicians, were able to discover a holocaust escape tunnel without destroying or interrupting it.


Again, with the key part of Ground Penetrating Radar being that it is non-invasive, technicians are easily able to assist law enforcement with investigations. Since non-invasive techniques are utilized, evidence will not be at risk for contamination or destruction. Buried weapon caches, evidence, or even clandestine burials are among the applications that technicians are able to properly locate and identify.

A great story recently came out of Vietnam where individuals are utilizing GPR to locate and return the remains of Vets missing in action from years ago.


Yes, Mars! Aboard  NASA’s Mars Reconnaissance Orbiter, a Ground Penetrating Radar system was utilized called the Shallow Subsurface Radar. This system was able to ping toward Mars more than 700 times per second. This system allowed scientists to see beneath the surface of Mars revealing that it had gone through an extreme ice age that would have put Earth’s ice age to shame. This system also revealed to the scientists that, after creating a 2d map of the subsurface, there is a lot of H2O and CO2 trapped.

In summary, it is clearly becoming more and more obvious that these Ground Penetrating Radar systems are becoming more and more important in the world of science, investigations, and even environmental monitoring. This is yet another nondestructive testing method that can not only teach us more, but do so noninvasively and safely.

Ultrasonic Testing

Cause & Effect Corrosion in Piping

Corrosion in piping is not only common, but it also can cause catastrophic failures in industrial, commercial, and residential settings. Not only is Steel City NDT LLC capable of testing for corrosion, but we are also able to tell you the extent of the corrosion.

Causes of Corrosion

  • pH of the medium contained within the piping system
  • Temperature of the medium – The hotter the water, the more pronounced the corrosion
  • Velocity of the medium – Not only can excessive velocity cause corrosion, but sudden changes in direction due to elbows or turns can also do the same
  • Chemical make up – If referring to a water piping system, things like excessive calcium can cause buildup and eventually corrosion
  • Oxygen content – Oxygen is another thing that corrodes and degrades metals by converting the metal to rust

Effects of Corrosion

  • Leaks – On average, about 25% of steel pipes will have a leaking connection within it’s first 5 years of use
  • Drop in pressure – Even the slightest corrosion causes an irregular inner surface profile which causes unacceptable drops in pressure
  • Air contamination – When compressed air passes through a rusted or corroded pipe, it becomes contaminated with hydrogen ions and rust particles
  • Wasted energy – When a pipe becomes choked off by rust buildup, piping systems will consume extra power to overcome this friction
Dye Penetrant Testing

5 Cool, Practical Uses for Phased Array Antennas and Transducers

Phased Arrays Explained – the Really Short Version

So what is a phased array antenna? Any antenna, from the one in your smartphone to a thousand-foot diameter radio telescope, does just two things – it sends out or receives electromagnetic energy waves like radio, radar, TV, microwave, etc. Conventional antennas have a limited ability to direct their beams. That’s one reason many radar antennas rotate – to scan the entire sky they must physically move the beam.

A phased array antenna is different. It combines an array of small, fixed, individually controlled antennas that can direct the beam in multiple directions. It can also be used to improve reception.

So what’s a phased array transducer? Basically, it’s the ultrasonic version of a phased array antenna – it beams (and acquires) ultrasonic waves using a multiple transducer array.

Sit Back and Enjoy the Flight

Ever wonder how your airline keeps you hooked-up to the internet at 35,000 feet over the Atlantic? It may well be a phased array antenna.

Here’s the problem – as your jam-packed jetliner is winging its way to your next tiny hotel room, the satellites it’s using to stay connected to the internet are changing their relative positions. Conventional, fixed antennas can’t handle that kind of variation, but a phased array antenna is just the thing for ensuring clear reception – even over Greenland.

Non Destructive Inspection – of Course!

Phased array transducers are the core of advanced ultrasonic inspection. Used for inspecting welds and other high value structures, phased array ultrasonic systems directionally beam waves of ultrasonic energy through the inspection piece. This enables the phased array transducer to be mounted in one or a limited number of positions. In contrast, a conventional ultrasonic inspection system uses a transducer that must be manually moved over point on the test piece. This can lead to inaccuracies and even missed defects, especially if the inspection piece has a complex geometry.

Phased array transducers – suddenly a complicated inspection task is lot more simple and accurate.

Talk Radio? Yeah, We’ve Got That.

Ever wonder why AM radio stations frequently use multiple antennas to broadcast their signal? All those towers actually form one big phased array antenna. Why do it? One, it lets broadcasters direct their signal towards the geographic area that holds their prime listeners. Two, as the sun sets listener reception can be improved by switching phases and power levels in individual antennas.

Sports, politics, news, oldies – all brought to you by phased array antennas.

Admit it – You Want a Phased Array Radar for Your Car

That day may not be far off. Researchers at a major automotive company have demonstrated a small phased array radar designed to detect and identify pedestrians. With over 4,000 pedestrian fatalities every year in the US, it’s a problem in need of an effective solution.

Phased arrays provide a wide detection angle and rapid object acquisition. Hooked up to the vehicle’s control system, it can bring a car or truck to a hard stop before the driver even realizes that a pedestrian stepped into the danger zone.

The Ultimate Stormchaser

While not yet in widespread use, phased array radars may provide the ultimate early warning system for tornados and other dangerous weather. The Navy even built a mobile unit mounted to a tricked-out truck. Think of it as your ultimate pimp-my-ride for the stormchasing crowd.

More than a science project, phased array weather radars promise faster, deeper scans of weather systems and that means earlier, more accurate weather warnings.