North West Tasmania, Tas, 2001 (WTRMP Area B) (P823), 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 North West Tasmania, Tas, 2001 (WTRMP Area B) (P823), radiometric line data, AWAGS levelled were acquired in 2001 by the TAS Government, and consisted of 33834 line-kilometres of data at 200m 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.

放射测量法（radiometric method），或称伽马射线能谱法（gamma-ray spectrometric method），通过检测地球地表附近的伽马射线自然变化，来反映由钾（K）、铀（U）和钍（Th）的自然放射性衰变产生的辐射信号。所采集的数据将通过标准流程进行处理，确保记录的响应仅源于地下岩石。处理后得到的数据集可用于解译，以揭示地下地质构造。经处理的数据会由GA地球物理学家开展质量校验，确保GA发布的最终数据符合使用要求。
本数据集为2001年塔斯马尼亚西北部（塔斯马尼亚州，WTRMP B区，编号P823）的放射测量航线数据，经全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）基准平差处理，由塔斯马尼亚州政府于2001年采集，总测线长度达33834线公里，测线布设间距为200米，地形离地高度为80米。为约束数据中的长波分量，研究人员采用了独立数据集——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面进行校正，本调查数据本质上已完成AWAGS基准平差。