Tanami EW 5N - U equivalent concentration grid (AWAGS, nasvd)

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 radiometric uranium grid has a cell size of 0.00018 degrees (approximately 20m) and shows uranium element concentration of the NTGS Tanami EW 5N Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2018 by the NT Government, and consisted of 11735 line-kilometres of data at 100m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid.

放射性测量法（radiometric method），亦称伽马射线能谱法，通过探测地表附近的伽马射线自然变化，反映钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的信号。所采集的数据将通过标准化流程处理，以确保记录的响应仅源于地下岩石的放射性衰变。经处理得到的数据集可用于解译，以揭示地下地质构造。经处理的数据将由GA（Geoscience Australia）地球物理学家开展质量核查，确保GA发布的最终数据满足应用要求。
该放射性铀元素格网的单元尺寸为0.00018度（约20米），展示了2018年北领地（NT）北领地地质调查局（NTGS）塔纳米EW 5N区域详细航空磁法-放射性测量与数字高程调查中的铀元素浓度，单位为百万分率（ppm）。
制作该格网所用的数据由北领地政府于2018年采集，涵盖11735线公里的测量数据，测线间距为100米，飞行离地高度为60米。
为约束格网中的长波长信号，本次研究采用了独立数据集——全澳航空地球物理调查（AWAGS）的航空磁法数据，以控制测方格网的基准水平。