Robinson River Wolla, NT, 1996 (P664), 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 Robinson River Wolla, NT, 1996 (P664), radiometric line data, AWAGS levelled were acquired in 1996 by the NT Government, and consisted of 82092 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（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），通过探测地球表面附近的伽马射线自然变化，来反映钾（K）、铀（U）及钍（Th）的自然放射性衰变所产生的信号。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的放射性衰变。经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发布的最终数据满足预定使用要求。本次数据集为1996年北领地（NT）罗宾逊河沃拉（Robinson River Wolla）地区的经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）平差校正的放射性测量测线数据（编号P664），由北领地政府于1996年采集，总测线里程达82092线公里，测线间距为500米，地形离地高度为100米。为约束数据中的长波长成分，研究人员采用独立数据集——AWAGS航空磁测数据——对本次调查数据的基准面进行校正。本次调查数据实质上已基于AWAGS完成平差校正。