Airborne Radiometric Calibration - an Australian Perspective

P. J. Groves; Ian Campbell

doi:10.1071/EG995284

ISSN: 0812-3985
E-ISSN: 1834-7533

Airborne Radiometric Calibration - an Australian Perspective
Authors P. J. Groves^a and Ian Campbell^b
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^a World Geoscience Corporation Ltd, 65 Brockway Rd Floreat WA 6014, Phone: (619) 383 7833, Fax: (619) 383 7166 ^b Austirex International Ltd, 27 Merriwa St Gordon NSW, 2072
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 26, Issue 2-3, Jun 1995, p. 284 - 291
DOI: https://doi.org/10.1071/EG995284
- Published online: 01 Jun 1995

Abstract

Airborne radiometric systems must be calibrated to present data devoid of artefacts peculiar to their acquisition. The IAEA(1991) model of the components of airborne radiation is outlined. This features: aircraft background radiation; cosmic-effect (related to survey altitude); Stripping Ratios which account for the spectral overlap of radiation from different radioelement sources; and height attenuation coefficients, which quantify the effect of Compton Scattering of gamma rays passing through the air. Resources of calibration pads and radiometric test range sites are listed. The facets of calibration procedure are discussed according to their application to the IAEA model. The resulting calibration parameters are used in a process to generate airborne radiometric system sensitivities by comparison of airborne and ground spectrometer data. This method can avoid errors in system sensitivity caused by environmental factors.

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1995-06-01

2026-01-16

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References

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Minty B.R.S., Morse M.P., Richardson LM.,1990 Portable calibration sources for airborne gamma-ray spectrometers, Exploration Geophysics, 21, 187195
Minty B.R.S., Grasty R.L.,1995, Proceedings from Radiometrics Workshop 6 April Canberra, Australia
Richards D.J., circa 1980, Geophysical Field Manual For Technicians #2 - Technical manual on radiometrics, South African Geophysical Association [SAGA]
Telford W.M., Geldart L.P., Sheriff R.E., Keys D.A.,1976 Applied Geophysics, Cambridge University Press.

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Article Type: Research Article

Keyword(s): Airborne radiometrics; Atmospheric attenuation; Pad calibrations; Radiometric sensitivity; Stripping ratios

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Airborne Radiometric Calibration - an Australian Perspective

Abstract

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