Birrindudu - Tanami, NT, 1997 (P1001), 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 Birrindudu - Tanami, NT, 1997 (P1001), radiometric line data, AWAGS levelled were acquired in 1997 by the NT Government, and consisted of 81828 line-kilometres of data at a line spacing between 200m and 400m, 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（又称伽马射线能谱法）通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）和钍（Th）自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处理，以确保记录的辐射响应仅来自地下岩石。经处理得到的数据集可通过解译，揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量校验，确保GA发布的最终数据符合使用需求。本次数据集为北领地（NT）政府于1997年采集的Birrindudu-Tanami地区（编号P1001）伽马射线能谱测线数据，经AWAGS基准平差校正。该数据集总测线长度达81828测线公里，测线间距为200米至400米，飞行离地高度为60米。为约束数据中的长波长信号，研究人员采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，对本次测线数据的基准水平进行校正。本次测线数据实质上已完成AWAGS基准平差。