Coober Pedy - 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 0.0004 degrees (approximately 42m) and shows uranium element concentration of the Coober Pedy West Airborne Magnetic Radiometric and DEM Survey, SA, 2017 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 90697 line-kilometres of data at 200m 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.

辐射测量法，又称伽马射线能谱法，通过探测地球表面附近的伽马射线自然变化，以反映钾（K）、铀（U）与钍（Th）的自然放射性衰变所产生的辐射信号。所采集的数据将通过标准流程进行处理，确保记录的响应仅源于地下岩石的辐射。最终生成的数据集可通过解译揭示地下地质构造。经处理的数据将由澳大利亚地质调查局（Geoscience Australia，GA）的地球物理学家开展质量核查，以确保该局发布的最终数据符合应用要求。
该辐射测量铀元素网格的单元格尺寸为0.0004度（约合42米），展示了2017年南澳大利亚州库伯佩迪西区航空磁辐射测量与数字高程模型（Digital Elevation Model）调查的铀元素浓度，单位为百万分之一（ppm）。用于生成该网格的数据由南澳大利亚州政府于2017年采集，共计90697测线千米的数据，测线间距为200米，地形离地高度为60米。为约束该网格的长波长信号，研究人员采用了澳大利亚全域航空地球物理调查（Airborne Geophysical Survey，AWAGS）的航空磁测数据，以校准该调查网格的基准值。