Oaklands Basin, NSW, 2002 (Area W) (P1028), 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 Oaklands Basin, NSW, 2002 (Area W) (P1028), radiometric line data, AWAGS levelled were acquired in 2002 by the NSW Government, and consisted of 54352 line-kilometres of data at 400m line spacing and 80m 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.

放射性伽马能谱测量法（radiometric, or gamma-ray spectrometric method）通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）和钍（Th）的天然放射性衰变所产生的辐射响应。所采集的数据将通过标准化流程进行处理，以确保记录的响应仅源自地下岩石的辐射。经处理得到的数据集可用于解译，以揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据满足实际应用需求。本次数据集为2002年新南威尔士州（NSW）奥克兰兹盆地W区域（P1028）的经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）平差校正的放射性航测线数据，由新南威尔士州政府于2002年采集完成，总测线长度达54352线公里，测线间距为400米，地形离地高度为80米。为约束数据中的长波长信号分量，本次数据处理采用了独立数据集——澳大利亚全国航空地球物理调查（AWAGS）航空磁测数据——对本次航测数据的基准电平进行校正管控。本次航测数据本质上已基于AWAGS完成平差校正。