The Granites D, NT, 1988 (P620), 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 The Granites D, NT, 1988 (P620), radiometric line data, AWAGS levelled were acquired in 1988 by the NT Government, and consisted of 9778 line-kilometres of data at 500m line spacing and 90m 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，又称伽马射线能谱法（gamma-ray spectrometric method）），通过检测地球表面附近的天然伽马射线自然变化，定量测定钾（K）、铀（U）和钍（Th）的天然放射性衰变所产生的伽马射线。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来自地下岩石。处理后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核查，以确保GA发布的最终数据符合使用需求。本数据集为1988年由北领地（Northern Territory, NT）政府采集的Granites D、NT、1988（P620）航空放射性测线数据，且已完成澳大利亚全国航空地球物理调查（Airborne Geophysical Survey, AWAGS）基准校正，测线总长9778线公里，测线间距500米，飞行离地高度90米。为约束数据中的长波长分量，本次调查采用了独立数据集——澳大利亚全国航空地球物理调查（Airborne Geophysical Survey, AWAGS）航空磁测数据——以此对本次测量数据的基准值进行校正。本次测量数据实质上已针对AWAGS完成基准校正。