Yalgoo, WA, 2014 (P1269), 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 Yalgoo, WA, 2014 (P1269), radiometric line data, AWAGS levelled were acquired in 2015 by the WA Government, and consisted of 126967 line-kilometres of data at a line spacing between 100m and 200m, and 50m 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.辐射测量法（radiometric method），亦称伽马射线能谱法（gamma-ray spectrometric method），可对地球表面附近探测到的伽马射线自然变化进行测量，该变化源于钾（K）、铀（U）与钍（Th）的天然放射性衰变。采集所得数据将通过标准化流程开展处理，以确保所记录的响应仅源于地下岩石。经处理得到的数据集可通过解译工作揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据满足使用要求。本次数据集为2015年由西澳大利亚州（Western Australia, WA）政府采集的2014年（编号P1269）亚尔古（Yalgoo）区域辐射测量航线数据，该数据经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）校正，总航线长度达126967线公里，航线间距为100米至200米，地形离地高度为50米。为约束数据中的长波长分量，本次调查采用独立数据集——AWAGS航空磁测数据，对本次调查数据的基准水平进行校正。本次调查数据已基本校正至AWAGS基准体系。