Katanning, WA, 2008 (P1177), 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 Katanning, WA, 2008 (P1177), radiometric line data, AWAGS levelled were acquired in 2008 by the WA Government, and consisted of 75805 line-kilometres of data at a line spacing between 100m 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.

辐射测量法，亦称伽马射线能谱法（gamma-ray spectrometric method），通过探测地球表面附近的伽马射线自然变化，表征由钾（K）、铀（U）及钍（Th）自然放射性衰变产生的辐射响应。所采集的数据将通过标准化流程处理，确保记录的辐射响应仅来源于地下岩石的放射性衰变。处理后得到的数据集可通过地质解译，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发布的最终数据符合使用需求。本次数据集为2008年西澳大利亚州（Western Australia, WA）卡坦宁（Katanning）地区的辐射测量测线数据（编号P1177），已参照全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）完成平差校正。该数据由西澳大利亚州政府于2008年采集，总测线长度达75805线公里，测线间距介于100米至400米之间，飞行离地高度为60米。为抑制数据中的长波长干扰，本次调查采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——校准测线数据的基准水平。本次测线数据已基本参照AWAGS完成平差校正。