Kalgoorlie East, WA, 2013 (P1261), 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 Kalgoorlie East, WA, 2013 (P1261), radiometric line data, AWAGS levelled were acquired in 2013 by the WA Government, and consisted of 121572 line-kilometres of data at 100m line spacing 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.

放射性测量法（radiometric method，又称伽马射线能谱法（gamma-ray spectrometric method）），可通过探测地表附近的伽马射线自然变化，量化由钾（K）、铀（U）及钍（Th）天然放射性衰变产生的辐射信号。所采集的数据将通过标准流程进行预处理，确保记录的响应信号仅源于地下岩石。经处理得到的数据集可用于解译，以揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核查，以确保GA发布的最终数据符合使用要求。
本次数据集为2013年由西澳大利亚州（Western Australia, WA）政府采集的、经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）校正的西澳大利亚州卡尔古利东部（Kalgoorlie East）放射性测量航线数据（编号P1261），总航线长度达121572线公里，航线间距为100米，地形离地高度为50米。为约束数据中的长波长信号，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，对调查数据的基准值进行校正。本航线数据最终已基本校正至AWAGS基准体系。