Helicopter Frequency-Domain EM

McPHAR’s helicopter-borne frequency-domain electromagnetic survey system is integrated around the HUMMINGBIRD EM sensor, which is available in a 5-frequency configuration, see the table below. The HUMMINGBIRD EM sensor, which is the heart of this system, can be simply described as a multi-frequency, multi-coil electromagnetic system, which measures the in-phase and quadrature responses from a number of coil-pairs installed in a tubular bird, towed beneath a helicopter. All components of the HUMMINGBIRD are digitally controlled, in fact, HUMMINGBIRD is 100% digital from front to back. 

Data is telemetered on a lightweight serial cable to the data acquisition console onboard the helicopter, where it is displayed on a LCD colour screen and recorded on hard disk.
Pilot guidance and DGPS navigation systems are integrated into the package together with a gammaray spectrometer (optional).  

A high-sensitivity cesium vapour magnetometer is installed inside the HUMMINGBIRD sensor airfoil.
Other flight control instruments include radar and barometric altimeters and a digital colour video imaging system.

FEATURES:

• Helicopter-borne frequency domain EM System - 5 frequencies ranging from 900 Hz to 35 kHz
• Good contouring in rugged terrain with accurate anomaly positioning
• All digital samples generated by HUMMINGBIRD provided as inphase and  quadrature measurements
• Flown in conjunction with magnetics and (optional) radiometrics
• DGPS navigation with pilot guidance
• Radar and/or laser altimeter, barometric altimeter & digital colour imaging

APPLICATIONS:

• Base & precious metals exploration
• Minerals exploration
• Geothermal mapping
• Kimberlite exploration
• Environmental engineering surveys
• Sand and Gravel mapping
• Ground Water exploration
• Sea-ice thickness mapping
• Mapping fresh water/salt water interfaces
• Permafrost mapping
   

		HUMMINGBIRD EM system and a Bell 206 L Long Ranger helicopter in Romania.
HUMMINGBIRD EM system and a Eurocopter SA-315 LAMA helicopter in Venezuela.	HUMMINGBIRD EM system and a Eurocopter AS350B2 helicopter in Greenland.