Streaky Bay - 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 41m) and shows uranium element concentration of the Streaky Bay Airborne Magnetic Radiometric and DEM survey, SA, 2018 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2018 by the SA Government, and consisted of 90670 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.放射性测量法（radiometric，或称伽马能谱法）通过探测地球表面附近的伽马射线自然变异，此类变异由钾（K）、铀（U）与钍（Th）的天然放射性衰变产生。所采集的数据将通过标准流程进行处理，以确保记录到的响应仅源自地下岩石。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验，以确保GA发布的最终数据符合使用要求。 本放射性铀格网的单元尺寸为0.0004度（约41米），展示的是2018年南澳大利亚州（SA）斯特里基贝航空磁测放射性测量与数字高程模型（DEM）调查项目的铀元素浓度数据，单位为百万分比（ppm）。 本格网所用数据由南澳政府（SA Government）于2018年采集，总测线长度达90670测线公里，测线间距为200米，地形离地高度为60米。 为约束格网中的长波分量，项目采用了独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据，对本次测格网的基准水平进行管控。