Paterson Central, WA, 2005 (P1092), 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 Paterson Central, WA, 2005 (P1092), radiometric line data, AWAGS levelled were acquired in 2005 by the WA Government, and consisted of 94391 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.

辐射测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），可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）的天然放射性衰变所产生的信号。所采集的数据将通过标准化流程处理，以确保记录的响应仅源于地下岩石的放射性信号。经处理得到的数据集可通过解译，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要求。本次数据集为2005年西澳大利亚州（Western Australia, WA）政府采集的西澳大利亚州帕特森中央（Paterson Central）2005年度（编号P1092）辐射测量航线数据，已完成澳大利亚航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）水准校准，总航线长度达94391线公里，航线间距为400米，飞行离地高度为60米。为抑制数据中的长波长区域信号，本次处理采用独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据，对本次调查数据的基准水平进行校正。本调查数据实质上已完成AWAGS水准校准。