Penola, SA, 1992 (P592), 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 Penola, SA, 1992 (P592), radiometric line data, AWAGS levelled were acquired in 1992 by the SA Government, and consisted of 14160 line-kilometres of data at 1500m 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.

放射性测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），通过探测地球表面附近的伽马射线自然变化，该信号源于钾（K）、铀（U）及钍（Th）的天然放射性衰变。所采集的数据将通过标准流程处理，确保记录的响应仅来自地下岩石的辐射信号。处理后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1992年采集的南澳大利亚州（South Australia，SA）佩诺拉（Penola）地区放射性测线数据（编号P592），该数据已通过澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）完成平差处理。该数据由南澳政府于1992年采集，总测线长度达14160测线公里，测线间距为1500米，地形离地高度为80米。为抑制数据中的长波长趋势分量，本次调查采用独立数据集——澳大利亚全国航空地球物理调查（AWAGS）航空磁测数据——对测线数据的基准面进行校正。本测线数据已基本按AWAGS基准完成平差。