Mount Peake, NT, 1995 (P646), 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 Mount Peake, NT, 1995 (P646), radiometric line data, AWAGS levelled were acquired in 1995 by the NT Government, and consisted of 60332 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.

辐射测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），可探测地表附近的伽马射线自然变化，这些变化源自钾（K）、铀（U）及钍（Th）的自然放射性衰变。所采集的数据将通过标准流程处理，以确保记录到的响应仅源于地下岩石。处理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。本次北领地（NT）皮克山（Mount Peake）1995年（P646）辐射测量航线数据经AWAGS基准校正，由北领地政府于1995年采集，总数据量达60332线公里，航线间距为500米，地形离地高度为100米。为约束数据中的长波长分量，本次处理采用了独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey，简称AWAGS）航空磁测数据，用于校正调查数据的基准水平。本次调查数据本质上已校正至AWAGS基准。