Litchfield South Area B, NT, 1984 (P541), 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 Litchfield South Area B, NT, 1984 (P541), radiometric line data, AWAGS levelled were acquired in 1984 by the NT Government, and consisted of 26132 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.

辐射测量法（或称伽马射线能谱法）可探测地表附近的伽马射线自然变化，该变化源于钾（K）、铀（U）与钍（Th）的天然放射性衰变。采集所得数据将通过标准流程处理，以确保记录的响应仅源自地下岩石。经处理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查，以确保GA发布的最终数据符合使用需求。本数据集为1984年北领地（NT）政府采集的北领地利奇菲尔德南部B区1984年（编号P541）经全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）校正的辐射测量测线数据，测线总长26132线公里，线间距500米，地形离地高度100米。为约束数据中的长波长分量，本次调查采用独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据——对测线数据的基准水平进行控制。本测线数据已基本完成AWAGS平差校正。