Bauhinia Downs, NT, 2000 (P1012), 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 Bauhinia Downs, NT, 2000 (P1012), radiometric line data, AWAGS levelled were acquired in 2000 by the NT Government, and consisted of 18905 line-kilometres of data at 400m line spacing and 80m 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.

辐射测量法（又称伽马能谱法）通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）及钍（Th）的自然放射性衰变所产生的辐射响应。所采集的数据将通过标准流程进行预处理，以确保记录的响应仅源于地下岩石的放射性衰变。经处理后得到的数据集可通过解译，用以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查，以确保GA发布的最终数据符合使用要求。

本数据集为北领地（Northern Territory, NT）鲍欣亚当斯（Bauhinia Downs）地区2000年度（编号P1012）的伽马辐射测线数据，已完成澳大利亚全域航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）水准校正，总测线长度达18905线公里，测线间距为400米，地形离地高度为80米。为抑制数据中的长波长分量，研究人员采用独立数据集——澳大利亚全域航空地球物理调查（AWAGS）航空磁测数据，对本次测线数据的基准水平进行校正控制。本次采集的测线数据已基本以AWAGS为基准完成水准校正。