From Geoscience Australia
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Calibration and data processing for airborne gamma-ray spectrometry

Created 16/10/2025

Updated 16/10/2025

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The shape and intensity of multichannel airborne gamma-ray spectra are influenced by many variables. The role of data processing is to correct the data for those influences not related to the geology, and to transform the observed spectra to equivalent concentrations of radioelements in the ground. The data need to be corrected for dead time, energy drift, and background radiation before being inverted to elemental count rates. The elemental count rates are then corrected for variations in the terrain clearance of the detector and reduced to elemental concentrations in the ground. Statistical errors in the raw data are propagated by the data processing procedures. The removal of background radiation increases the fractional errors for each of the potassium, uranium and thorium window count rates. The fractional errors in the potassium and uranium window count rates are also amplified by the stripping procedure. Large errors can be introduced into the data through the height correction procedure if radon background is not adequately removed. Radon background can be adequately removed using a spectral-ratio method.

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Additional Info

Field Value
Title Calibration and data processing for airborne gamma-ray spectrometry
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/4f15d8d4-0d86-402b-8291-a30575922ce0
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "Calibration and data processing for airborne gamma-ray spectrometry". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/calibration-and-data-processing-for-airborne-gamma-ray-spectrometry