West Musgrave, WA, 2002 (P863), 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 West Musgrave, WA, 2002 (P863), radiometric line data, AWAGS levelled were acquired in 2002 by the WA Government, and consisted of 62081 line-kilometres of data at 400m line spacing 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.

伽马射线能谱法（Gamma-ray Spectrometric Method，亦称辐射测量法）可探测地表附近的伽马射线自然变化，此类变化源自钾（K）、铀（U）以及钍（Th）的自然放射性衰变。所采集的数据将通过标准流程进行处理，以确保记录的响应仅源自地下岩石的放射性辐射。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查，以确保GA发布的最终数据符合使用要求。本次数据集为2002年由西澳大利亚州政府采集的西马斯格雷夫（West Musgrave, WA）2002年（P863）辐射测量测线数据，经AWAGS平差处理，测线总长62081线公里，测线间距400米，飞行离地高度60米。为抑制数据中的长波长信号，本次处理采用了独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，以管控测线数据的基准水平。本次测线数据实质上已基于AWAGS完成平差校正。