Roper River - Rose River, 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 - Rose River, 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（radiometric method，亦称伽马能谱法，gamma-ray spectrometric method）可探测地表附近的伽马射线自然变化，该变化源自钾（K）、铀（U）与钍（Th）的天然放射性衰变。所采集的数据将通过标准化流程进行处理，以确保记录到的响应仅源于地下岩石的辐射。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核查，以确保GA发布的最终数据符合使用要求。
本次数据集为北领地（NT）政府于1993年采集的罗珀河-罗斯河地区（编号P610）伽马能谱测线数据，已经澳大利亚全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）校准。该数据集包含19738测线公里的数据，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分量，本次调查采用独立数据集——澳大利亚全国航空地球物理调查（AWAGS）航空磁测数据——来控制测线数据的基准面。本测线数据实质上已按AWAGS标准完成校准。