Fowler's Gap, Corona, NSW, Broken Hill Exploration Init., 1995 (P642), 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 Fowler's Gap, Corona, NSW, Broken Hill Exploration Init., 1995 (P642), radiometric line data, AWAGS levelled were acquired in 1995 by the NSW Government, and consisted of 47943 line-kilometres of data at a line spacing between 100m and 200m, 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.

放射性测量法（radiometric method），又称伽马能谱测量法（gamma-ray spectrometric method），用于测量地表附近伽马射线的自然变化，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来自地下岩石。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检查，以确保GA发布的最终数据符合使用要求。
1995年由新南威尔士州（NSW）政府采集的福勒盖普、科罗纳地区（布罗肯希尔勘探计划1995年，编号P642）经AWAGS平差校正的放射性测线数据，总测线长度达47943线公里，测线间距介于100米至200米之间，地形离地高度为60米。为约束数据中的长波长分量，研究人员采用澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）的航空磁测数据作为独立数据集，对本次调查数据的基准水平进行校正。本次调查数据实质上已按AWAGS标准完成平差校正。