Murrumbateman, NSW, 2010 Detailed Airborne Survey (P1253), 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 Murrumbateman, NSW, 2010 Detailed Airborne Survey (P1253), radiometric line data, AWAGS levelled were acquired in 2010 by the NSW Government, and consisted of 1339 line-kilometres of data at 125m 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.

放射性测量法（radiometric method，亦称伽马能谱法）通过探测地球表面附近的伽马射线自然变化，表征由钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射信号。所采集的数据将通过标准流程进行处理，以确保记录的辐射响应仅源于地下岩石。经处理得到的数据集可通过解译，揭示地下地质构造。由GA地球物理学家对处理后的数据开展质量核查，以确保GA发布的最终数据适配应用需求。2010年，新南威尔士州（New South Wales，简称NSW）政府采集了穆伦比德曼（Murrumbateman）地区详细航空测量项目（P1253）的放射性测线数据，该数据已完成AWAGS基准校正。本次项目总测线长度达1339线公里，测线间距为125米，飞行离地高度为60米。为约束数据中的长波长信号，项目采用了独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，简称AWAGS）航空磁测数据，以此控制本次测量数据的基准水平。本次测量数据实质上已完成AWAGS基准平差。