This is the most advanced Airborne Electomagnetic system available and with its excellent performance characteristics, TEMPEST offers cost effective solutions for a wide range of medium to large survey applications.
New Opportunities
TEMPEST offers new opportunities for exploration projects. Its rapid data acquisition ability accelerates the identification of priority areas for ground follow up which minimises environmental impact and access problems. TEMPESTs fixed wing configuration makes it cost effective for large scale reconnaissance projects, where ground and helicopter EM surveys would be prohibitively expensive. The quality detail and accuracy of TEMPEST data reveals geological and structural information that cannot be matched by other airborne techniques.
Technical Advances
Broad bandwidth
- provides shallow and deep mapping capability
System geometry corrections
- improves accuracy
Advanced data processing techniques
- allows 3D data presentation
Applications
Minerals:
TEMPEST is ideal for diamond exploration, gold exploration, regolith and paleochannel mapping and base metals exploration in resistive conditions.
Environmental:
TEMPEST provides a highly cost effective method of conducting large-scale groundwater surveys and salinity mapping.
Features
Square transmitter waveform proving improved ground response and data processing routines.
Wide bandwidth enhances discrimination of conductive features.
Improved monitoring of system geometry variations.
Data processing routines that remove the effects of system geometry changes.
3D mapping capability.
System Specifications
Base frequency
25 Hz
Transmitter area
186 m2
Transmitter turns
1
Waveform
Square
Duty cycle
50%
Transmitter pulse width
10 ms
Transmitter off-time
10 ms
Peak current
300 A
Peak moment
55,800 Am2
Average moment
27,900 Am2
Sample rate
75 kHz
Sample interval
13 microseconds
Samples per half-cycle
1500
System bandwidth
25 Hz to 37.5 kHz
Flying Height
120 m (subject to safety considerations)
EM sensor
Towed bird with 3 component dB/dt coils
Tx-Rx horizontal separation
122 m (nominal, actual value determined)
Tx-Rx vertical separation
37 m (nominal, actual value determined)
Stacked data output interval
200 ms (~12 m)
Number of output windows
15
Window centre times
15 windows from 13 microseconds to 16.2 milliseconds
FALCON
Survey
Technology 
