Birrindudu, WA, 1991 (wa241mr_b) (P871), 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, WA, 1991 (wa241mr_b) (P871), radiometric line data, AWAGS levelled were acquired in 1991 by the WA Government, and consisted of 176812 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.

放射测量法（radiometric method），亦称伽马射线能谱法（gamma-ray spectrometric method），通过检测地球表面附近的伽马射线自然变化，获取由钾（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化流程处理，以确保记录的响应仅源自地下岩石的辐射贡献。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地球物理学家开展质量核验，以确保GA发布的最终数据满足使用需求。本次数据集为1991年由西澳大利亚州（Western Australia, WA）政府采集的毕林杜杜（Birrindudu）地区放射测量测线数据（编号为wa241mr_b、P871），该数据已完成AWAGS水准平差，总测线长度达176812测线公里，测线间距介于200米至400米之间，地形离地高度为60米。为约束数据中的长波长信号，研究人员采用澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据这一独立数据集，对本次调查数据的基准电平进行校正控制。本次调查数据已基本按AWAGS标准完成水准平差。