SkyTEM system

SkyTEM is a dual-moment Time-Domain Electromagnetic System (TDEM) designed specifically to collect data comparable to the finely detailed data previously only possible with ground geophysical techniques.  The system collects the cleanest and highest quality data available on the market due to the capability to produce data that is free of drift and the need for high altitude corrections.  This unique ability reduces data manipulation and SkyTEM's geophysicists are able to plot highly detailed maps soon after the helicopter lands.  
 
As the only airborne system capable of operating in dual transmitter modes SkyTEM can discriminate between weak geological contrasts in the top layers concurrently with those at depth. Innovative and patented receiver coil technology eliminates signal drift and an extremely rigid platform ensures the delivery of high quality high resolution data. SkyTEM is currently the only airborne geophysical contractor able to offer this state-of-the-art technology.
 
Stakeholders with a need for high resolution maps of the top 400m take advantage of SkyTEM's unique ability to operate with simultaneously in: 

* Low moment (LM) mode with low current with a high base frequency and fast turn off for early-time data and high spatial sampling for shallow imaging, and
* High moment (HM) mode with high current with low base frequency for high quality late-time data for deep imaging.

The frequency range is selectable, depending on the known characteristics of the target being pursued and operate between approximately 222 Hz and 25 Hz.  Dual mode transmitters configured to optimize the conductivity mapping range dramtically increases the accuracy and resolution of horizontally layered geology.  
 
The transmitter loop is mounted around the perimeter of the lightweight lattice frame, while the receivers of the vertical Z- and the horizontal X-component are rigidly mounted at one end of the elongated hexagonal frame. This construction ensures a well defined geometry at all times and additionally allows for a low, effective terrain clearance of the system.

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Magnetometer

The magnetometer can be deployed as a stand-alone airborne survey or integrated with the SkyTEM system.

Magnetometer integrated with SkyTEM

The cesium magnetometer is located on a boom in front of the lattice frame

The magnetic system is synchronized with the TEM system and measures during the TEM off-time.

Stand-alone airborne magnetic survey

Employed as a stand-alone system the cesium magnetometer is towed in a bird beneath a helicopter.

During the survey height, inclination and position is measured along with the total magnetic field.

The aeromagnetic data and survey parameters are accessible for viewing on-time during the flights.

The system is very compact and can even be brought on an aircraft as carry-on luggage.