The GEM-5 array is a vehicle-mounted or vehicle-towed gradiometer
sensor for rapid ground coverage. It has a transmitter in the middle
straddled by two identical receiver coils below and above. The difference
between the two receiver coils constitutes the signal. The gradiometer
configuration has the following advantages:
- Vertical directional response, not affected by targets to the side,
ideal for vehicle mounting
- Immunity to noise induced by sensor motion
- Immunity to ambient environmental EM noise
- Immunities provide improved signal-to-noise ratio (SNR)
The array has the following advantages:
• Maximum possible transmitter moment for a given array size
• Broadband, up to 10 frequencies between 30Hz - 93kHz
• Multiple receiver channels operating simultaneously;
• High-speed survey with high data density
Many configurations are possible.
|
 |
