SkyTEM is a leading airborne geophysical survey company offering the acquisition and advanced processing of transient electromagnetic (TEM), magnetic and radiometric data. Our success is driven by our people and their commitment to achieving good results through appropriate and innovative technologies, operational efficiency and delivery of accurate and timely earth data. We began as a breakthrough technology with the unique dual-moment capability to map both shallow and deep geology, concurrently and in high resolution. We remain totally involved in improving how the world maps the subsurface. We offer a choice of systems, each with a focus on the depth and resolution requirements of the mineral , energy, engineering and water sectors.

Company details

Dyssen 2 , Aarhus N , DK-8200 Denmark
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Business Type:
Industry Type:
Soil and Groundwater Monitoring
Market Focus:
Globally (various continents)
Year Founded:
$1,000,000 US - $10,000,000 US

SkyTEM systems do what no other single airborne geophysical system can – map the near surface in high resolution concurrently with accurate measurements to depths approaching 500 m.

Engineered to detect subtle geological variations SkyTEM delivers a comprehensive interpretation of near-surface geology and increases confidence in modeling deeper geology. Furthermore, inverted data is available in 48 hours. SkyTEM’s suite of systems satisfies the most challenging mapping needs and offer a wide range of solutions for resource management.

SkyTEM systems are designed to detect subtle variations in conductivity/resistivity making it possible to deliver accurate high resolution images of alterations in the earth. The magnetometer and gamma ray spectrometer are mounted directly on the frame so that measurements are made as close to the ground as possible from an airborne geophysical platform.

Our deliverables include a diverse range of map products and visualizations such as 3D images and inversions within 48 hours.

We distinguish ourselves by:

Fast Survey Completion

  • Acquisition of up to 1,000 line kilometres per day
  • Robust system for challenging weather and terrain conditions
  • Rare reflights required due to system engineering and survey planning
  • Professional and competent field staff

Instant Data Turnover

  • Data QC performed in the field as data is acquired
  • Preliminary data and inversion delivered within 48 hours
  • Allowing decision on in-fills to be made during the survey

High-quality Accurate Data

  • MultiMoment maps near sureface in high resolution concurrently with accurate measurements to depth
  • Depth of penetration can be customized to suit the geology and target
  • Meeting with the client to present and discuss final results
  • Advanced processing options

Global Scope

Our diverse and highly skilled workforce of geophysicist, engineers, technicians and project managers have managed and completed projects on all seven continents and are experienced in all aspects of geophysical data collection and safe operations. Our global coverage is complemented via partner companies that are strategically located to ensure availability of our technology and services.
Technology and Emerging Needs

The SkyTEM Method is not based on what others have done – and are still doing – rather, we engineered a truly innovative and unique technology capable of delivering accurate and finely detailed images from the very near surface to depth using airborne geophysical surveys. We focus on improving your ability to find, manage and develop resources and your ability make timely decisions with confidence. We continue to develop the next generation of TDEM sensors, including the achievement of even greater depths of penetration and increasing our already high S/N ratio , via our on-going investment in R&D .

Environment and Safety

We take great pride both as a company and as individuals in our contribution to the communities where we live and work. We operate always with great care for the environment and are proud of the many ways that our employees work to safeguard it.

Our Work

We recognize that the world needs all the water, energy and mineral resources we can develop and we work continuously to develop ways to map and manage these resources.

The Early Pioneers

Over 1,000 years ago the Vikings used light weight yet strong and versatile ships to explore unchartered waters and discover new lands. The Viking Age was the age of the sleek, speedy longship and this crucial advance in ship technology helped the Nordic people become a dominant force in politics and trade. Today another innovative Nordic exploration technology, SkyTEM, is being used to explore for critical resources, but now the ship sails the skies.

The Recent Past

In Denmark, as in much of the world, the supply of drinking water is based entirely on groundwater resources. In the 1990s the Danish Environmental Protection Agency (EPA) decided that before land could be slated for urban development it had to first be examined to determine if aquifers were present in the area in order to protect them from potentially harmful human activities. In an effort to make sound decisions on how and where to protect these critical resources it was important to base decisions on accurate and reliable information, in this case, spatially dense hydrogeological maps.

Ground based methods produced highly accurate three dimensional data sets, but were slow and difficult to employ in hilly terrain or populated areas. Airborne systems at the time were not suited to detecting subtle variations and geological layering required for mapping aquifers. Also, conventional airborne systems were designed as “bump detectors “ for mineral exploration and could provide either near surface or deep images – but not both. The R&D team of leading geophysicists, hydrologists and scientists within government and universities, eventually the initial SkyTEM team, set out to develop a method capable of mapping the near surface concurrently with mapping to depths of about 350 m – the interval where the aquifers resided. They also set out to collect highly accurate noise free data that was robust enough to create advanced map products within a few days of being acquired.

With these specific aims in mind the first SkyTEM high resolution electromagnetic system was developed. It was and still is an industry breakthrough – one that changed the industry – as it was the first and only system engineering with a Dual Moment transmitter designed for the simultaneous collection of shallow and deep data. Also unique is the development of a low-noise receiver that eliminates almost all of the primary noise from the transmitter – a problem that plagues all airborne EM systems. Another breakthrough is the elimination of system drift and the need to continuously calibrate the system during production flights. The SkyTEM frame is rigid enough to place an array of ancillary sensors. All sensors, including the magnetometer, are mounted on the rigid carrier frame and flown at low altitude ensuring that all measurements are recorded as close to the ground as is achievable from an airborne geophysical platform. This allows for increased accuracy and the collection of the highest lateral and horizontal resolution obtainable.

It was recognized early on that the system was able to produce results matching various ground geophysical techniques so several systems were built and deployed to map the entire country of Denmark. During that time the technical team had the opportunity to work with the users of the data. They received valuable feedback and identified areas for system improvement and set further R&D objectives. After collecting, processing and analyzing many thousands of kilometres of data and gaining many years of operational experience the SkyTEM team decided to make their breakthrough technology available to the world. The first commercial SkyTEM survey was performed in 2003 and SkyTEM Surveys ApS was officially launched in April 2004.

2005 saw the first SkyTEM surveys for mineral exploration in Canada and Scandinavia. Since then development of systems continued and SkyTEM now offers systems that are capable of mapping to depths of over 500 m, or as shallow as the top few metres, depending on the application and targets sought. SkyTEM technology has been successfully applied globally for locating drill targets for a variety of economic mineral deposits, including gold, copper, nickel, platinum, uranium and coal.

Today and Beyond

SkyTEM’s mapping abilities have also been recognized by engineers, scientists and others with a need to accurately map the subsurface. The SkyTEM method has been called upon to locate water on a Galapagos Island, characterize a pipeline construction route, study slope stability on Mt. St Helens, identify contaminant pathways, map salt water intrusion, verify conditions for a planned CO2 sequestration site and a wide range of geotechnical engineering studies. SkyTEM is the first helicopter-borne geophysical method to be used in Antarctica. Scientists working on that project noted the system’s ability to map the hidden distribution of ice and water on the frozen continent and stated that the SkyTEM Method provided more knowledge about the subsurface of Antarctica than 40 years of drilling and traditional geological studies.

The SkyTEM R&D team are constantly improving the system and are working towards the next breakthrough in the collection and processing of accurate high resolution geophysical data.