Roper River - Phelp, NT, 1993 (P610), 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 Roper River - Phelp, NT, 1993 (P610), radiometric line data, AWAGS levelled were acquired in 1993 by the NT Government, and consisted of 19738 line-kilometres of data at 500m line spacing and 100m 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（或称伽马能谱法）测量地球表面附近探测到的伽马射线的自然变化，这些变化源于钾（K）、铀（U）和钍（Th）的自然放射性衰变。收集的数据通过标准方法处理，以确保记录的响应仅来源于地下岩石。处理结果生成的数据集可通过解译揭示地下地质结构。处理后的数据由GA地球物理学家进行质量检查，以确保GA发布的最终数据符合预期用途。
这套1993年由北领地政府（NT Government）获取的罗珀河-费尔普（Roper River-Phelp）地区（北领地，1993年，编号P610）经全澳航空地球物理调查（AWAGS）校正的放射性测线数据，包含19738测线公里，测线间距500米，地形净空高度100米。为了约束数据中的长波长成分，研究使用了独立的全澳航空地球物理调查（AWAGS）航空磁测数据来控制本次调查数据的基准面。该调查数据本质上已校正至AWAGS基准。