Limbunya 2, NT, 1995 (P612), 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 Limbunya 2, NT, 1995 (P612), radiometric line data, AWAGS levelled were acquired in 1995 by the NT Government, and consisted of 60157 line-kilometres of data at 500m line spacing and 100m 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，亦称伽马射线能谱法）通过探测地球表面附近的伽马射线自然变化，以反映钾（K）、铀（U）与钍（Th）的自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化流程开展处理，确保记录的响应仅来源于地下岩石的辐射。经处理得到的数据集可通过解译，揭示地下地质构造特征。经处理的数据将由GA地球物理学家进行质量核查，以确保GA发布的最终数据符合使用要求。
本次数据集为1995年北领地（NT）林布尼亚2号（Limbunya 2，编号P612）的放射性测量测线数据，经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）平差校正，由北领地政府于1995年采集完成，总测线长度达60157测线公里，测线间距为500米，飞行离地高度为100米。为约束数据中的长波长信号，项目采用独立数据集——澳大利亚全国航空地球物理调查航空磁测数据，对本次调查数据的基准面进行校正控制。本次调查数据实质上已完成AWAGS基准平差。