Albany-Fraser (Balladonia), WA, 1981 (P462), radiometric line data, AWAGS levelled

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
This Albany-Fraser (Balladonia), WA, 1981 (P462), radiometric line data, AWAGS levelled were acquired in 1981 by the WA Government, and consisted of 12871 line-kilometres of data at 1500m line spacing and 150m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

放射测量法（又称伽马能谱法）通过探测地表附近的伽马射线，来反映由钾（K）、铀（U）与钍（Th）自然放射性衰变产生的射线自然变化情况。所采集的数据将通过标准化流程进行处理，以确保记录的响应仅源自地下岩石。经处理后得到的数据集可通过解译，揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核验，确保GA发布的最终数据符合使用需求。

本次数据集为1981年西澳大利亚州奥尔巴尼-弗雷泽（巴拉多尼亚）地区（编号P462）的经AWAGS平差的放射测量航线数据，由西澳大利亚州政府于1981年采集，总测线里程达12871公里，测线间距为1500米，飞行离地高度为150米。为抑制数据中的长波长成分，本次研究采用独立数据集——澳大利亚全域航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，对本次测量数据的基准水平进行管控。本航线数据已基本完成AWAGS平差处理。