Yarrie, Anketell, WA, 1992 (P562), 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 Yarrie, Anketell, WA, 1992 (P562), radiometric line data, AWAGS levelled were acquired in 1992 by the WA Government, and consisted of 9313 line-kilometres of data at 1600m line spacing and 60m 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.

伽马能谱法（gamma-ray spectrometric method，又称放射性测量法）可探测地球表面附近的伽马射线自然变化，该变化源于钾（K）、铀（U）与钍（Th）的自然放射性衰变。所采集的数据将通过标准流程进行处理，以确保记录的响应仅由地下岩石引起。经处理得到的数据集可通过解译揭示地下地质构造。GA地球物理学家会对处理后的数据开展质量检查，以确保GA发布的最终数据符合使用需求。本次发布的是1992年西澳大利亚州（Western Australia, WA）Yarrie、Anketell地区（编号P562）的航空伽马能谱测线数据，该数据已完成澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）平差处理。该数据由西澳大利亚州政府于1992年采集，总长9313测线公里，测线间距1600米，飞行离地高度60米。为约束数据中的长波长分量，本次调查采用独立数据集——澳大利亚全国航空地球物理调查（AWAGS）航空磁测数据——来校准测线数据的基准面。本次测线数据已基本与AWAGS基准统一。