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At the heart of the Xact™ fixed-wing magnetic and radiometric system, is the Pilatus PC-6 Turbo Porter STOL aircraft. Renowned for its safety and ability to fly slowly, this aircraft is the ideal platform for high resolution airborne surveys.

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Fixed Wing Magnetics and Radiometrics

The Xact™ gradiometer system is the most cost effective means of acquiring high resolution geophysical data for the successful mapping of subtle geological features.

At the heart of the Xact™ fixed-wing magnetic and radiometric system is the Pilatus PC-6 Turbo Porter STOL aircraft. Renowned for its safety and ability to fly slowly, this aircraft is the ideal platform for high resolution airborne surveys.

The aircraft has unrivaled STOL performance which allows survey in even the most remote environments. This coupled with a very low stall speed results in excellent drape characteristics.

All aircraft are owned by NRG ™ and are dedicated full time survey platforms. The aircraft have been subject to an intense magnetic clean up and degaussing process, which ensures very low noise magnetic data. In addition, the data is compensated using our specially adapted and modified 27-term compensation algorithm. The resultant processed data is of a very high standard and results in a superior standard of final product.

NEW RESOLUTION MAGNETICS

The Xact™ system has a 9.8m horizontal sensor separation, which allows for measurement of the horizontal magnetic gradient. Incorporating the magnetic gradient in gridding algorithms provides significant improvement in delineating line parallel features, spatial positioning of offline anomalies and overall resolution of the magnetic data.

NEW RESOLUTION RADIOMETRICS

As a compliment to the industry-leading gradient enhanced magnetic data, NRG™ utilises state of the art Radiation Solution Spectrometers with up to 2048 in Nal crystal packs. This ensures that the radiometric data is of the highest standard currently available. Full spectral NASVD processing is applied to all data as a standard. Radiometric spectra is recorded at 2Hz which ensures proper definition of even the most narrow of anomalies.

Key benefits of the system include:

  • The fixed-wing system is the most cost effective means of acquiring airborne data
  • Superior sampling rates: 20Hz for magnetic data and 2Hz for full 256 channel
  • Custom built DAS enable highly synchronous high speed sampling using a Rb atomic clock
  • Cost effective mapping solution

 

Technical Specifications

Magnetic Gradiometer Platform
Type Horizontal Gradient
Sensor Separation 9.8m
Typical Noise envelope 0.001nT/m SDEV 4th diff
Aircraft Type PC6
Engine Type Turbine
Fuel Type JetA1
Acquisition System
Type NRG RDAS II
CPU Dual Core ARM 1.5Ghz
Operation Temperature -10 to 65 Degrees C
Standard Sampling Rate 20 Hz
Magnetometer Counter
Type NRG RDAC II
Internal System Noise <0.0001 nT
Adc Inputs 24
Magnetometer Inputs 4
Recording Rate 20 Hz (capable of >1kHz)
Magnetometer Sensor
Type Scintrex CS3
Measurement Range 15 000 – 105 000 nT
Gradient Tolerance 40 000 nT/m
Operating Temperature -40 to +50 Degrees C
Recording Rate 20 Hz (capable of >1kHz)
Fluxgate Magnetometer
Type Bartington
Analogue output +- 10 V
Linearity error <0.0015%
Calibration accuracy +- 0.5%
Bandwidth 0.3 KHz
Internal noise <6 pTrms/Hz @1Hz
Recording Rate 20 Hz (capable of >1kHz)
Base Station Magnetometer
Type NRG VER2
Manufacturer NRG Engineering
Range 15 000 to 105 000nT
Sensitivity 0.0006 nT vHz RMS
Recording Rate 1Hz
GPS Positioning
Type Novatel DL-V3L1L2
Differential Correction Real Time
Code Tracked C/A
Number of Satellites 12
Recording Rate 20 Hz
Gamma-Ray Spectrometer
Type Radiation Solutions – RSX4
Spectral Analysis Real Time
Channels 1024
Data Recorded 256 channel full spectrum
Measurement Range 0 – 3.0 MeV
Dead Time Zero
Recording Rate 2 Hz
Energy Resolution <8.5%
Trigger External
Radiometric Detector
Type Sodium Iodide
Volume 16.7 litres
Stabilisation Automatic
Recording Rate 2 Hz
Barometer
Type Vaisala
Pressure Resolution 0.001 mb
Operating Pressure Range 600 – 1060 mb
Recording Rate 20 Hz (capable of >1kHz)
Temperature
Type Vaisala
Resolution 0.05 DegC
Accuracy 0.1 DegC
Recording Rate 20 Hz (capable of >1kHz)
Radar Altimeter
Type Free Flight
Operating range 0 - 762 m
Accuracy 0 - 10 m +-0.3m
Accuracy 10 - 762 m +-0.5m
Recording Rate 20 Hz (capable of >1kHz)
Field Data Verification System
Processing Software Platforms Geosoft Oasis Montaj and Proprietary Software