Southern Darling Basin Airborne Survey, NSW, 2005 (P1104), 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 Southern Darling Basin Airborne Survey, NSW, 2005 (P1104), radiometric line data, AWAGS levelled were acquired in 2005 by the NSW Government, and consisted of 18763 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.

放射性测量法（radiometric method），又称伽马射线能谱法（gamma-ray spectrometric method），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）和钍（Th）的天然放射性衰变。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于地下岩石。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检查，以确保GA发布的最终数据符合使用要求。2005年新南威尔士州（New South Wales, NSW）达令盆地南部航空测量项目（编号P1104）的放射性测量航线数据（经AWAGS平差校正）由新南威尔士州政府于2005年采集完成，总测线长度达18763测线公里，测线间距400米，飞行离地高度60米。为约束数据中的长波长分量，本次测量采用独立数据集——全澳航空地球物理测量（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，对本次测量数据的基准水平进行校正。本项目测量数据实质上已完成AWAGS基准平差。