Fugro Airborne Surveys has performed airborne gamma-ray spectrometry (AGS or radiometrics) surveys worldwide for over 40 years. In the last 5 years alone, Fugro Airborne Surveys has collected and processed over 2 million line kilometres of airborne gamma-ray spectrometer data.
Fugro Airborne Surveys uses Exploranium GR-820 or Radiation Solutions RS-500 256-channel gamma-ray spectrometers on both fixed-wing and helicopter platforms. Either unit can be configured with up to 67.2 litres (4096 cubic inches) of main (downward) NaI crystal detector, and up to 16.8 litres (1024 cubic inches) of upward looking detector volume.
Fugro Airborne Surveys follows the principles outlined in IAEA Technical Report 323 (Airborne Gamma-Ray Spectrometer Surveying), and in AGSO Record 2000/05 (A Guide to the Technical Specifications for Airborne Gamma-Ray Surveys) for calibration, data acquisition and processing, but uses more advanced techniques for specific aspects.