Kingoonya - dose rate grid (AWAGS)

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. The total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered total dose rate grid.This Kingoonya - dose rate grid (AWAGS) has a cell size of 0.0004 degrees (approximately 41m) and shows the total dose rate of the Kingoonya Airborne Magnetic Radiometric and DEM survey, SA, 2018 survey. The data used to produce this grid was acquired in 2018 by the SA Government, and consisted of 149477 line-kilometres of data at 200m line spacing and 60m terrain clearance.

辐射测量法（又称伽马能谱法）通过检测地表附近的伽马射线自然变化开展测量，这些伽马射线源自钾（Potassium, K）、铀（Uranium, U）和钍（Thorium, Th）的自然放射性衰变。所采集的数据将通过标准流程进行处理，以确保记录的响应仅源于地下岩石。处理后得到的数据集可通过解译揭示地下地质构造。GA的地球物理学家会对处理后的数据开展质量检查，以确保GA发布的最终数据符合使用要求。总剂量率源自天然辐射源，通过将地面宇宙剂量与陆地剂量相加计算得到。陆地剂量率网格是经过滤波的钾、铀、钍网格的线性组合生成的，随后会对该网格应用低通滤波器，以生成滤波后的总剂量率网格。本次的Kingoonya剂量率网格（AWAGS）单元格大小为0.0004度（约41米），展示了2018年南澳大利亚州（South Australia, SA）Kingoonya航空磁辐射测量与数字高程模型（Digital Elevation Model, DEM）调查的总剂量率。用于生成该网格的数据由南澳大利亚州政府于2018年采集，总数据量为149477线公里，测线间距为200米，飞行离地高度为60米。