VLF Electromagnetic receiver

Airborne VLF measurements are now commonly performed as part of multiparameter airborne geophysical surveys.
 
 

TOTEM-2A has three orthogonally mounted coils which measure the total field strength and the vertical quadrature component of the magnetic VLF field. No external correction is required for aircraft pitch, roll, and yaw. This VLF method does not require its own transmitter, and thus becomes the fastest and the least expensive EM technique.   VLF sensors can be installed on a wing tip, nose stinger, tail stinger, lower helicopter frame, or a towed bird.

TOTEM-2A Console and Sensor/Preamplifier Assembly

The addition of the TOTEM-2A in your airborne geophysical packages only marginally increases the survey cost, yet the data have demonstrated the usefulness of this technique in geological mapping.
 

• Receives the magnetic components of fields radiated from VLF transmitters in the 15-25 kHz frequency range. These transmitters are located around the world for navigation and communication with submarines. Because of its simplicity, size and ease of operation, this VLF system is a cost effective addition to existing and new airborne geophysical exploration systems.

 
• VLF data complements airborne magnetic data.

 
• Airborne VLF EM data are mainly used for geological mapping, interpretation of large scale geological features, such as faults in conducting rock. Also, under favourable circumstances smaller conductors may be revealed, locating new sources of groundwater and buried hazardous waste, etc.


TOTEM-2A VLF Electromagnetic Receiver Data Sheet

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