Tallaringa South - 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 Tallaringa South - dose rate grid (AWAGS) has a cell size of 0.0004 degrees (approximately 42m) and shows the total dose rate of the Tallaringa South Airborne Magnetic Radiometric and DEM Survey, SA, 2017 survey. The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 146285 line-kilometres of data at 200m line spacing and 60m terrain clearance.辐射测量法（radiometric）或伽马射线能谱法，可通过探测地表附近因钾（K）、铀（U）和钍（Th）自然放射性衰变产生的伽马射线，测量其天然强度波动。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自地下岩石。经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验，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估算值与陆地剂量率相加计算得到。陆地剂量率网格由经过滤波的钾、铀和钍网格线性组合生成，并对该网格应用低通滤波器，以生成滤波后的总剂量率网格。 本塔灵加南部剂量率网格（AWAGS）的单元格尺寸为0.0004度（约42米），展示了2017年南澳大利亚州塔灵加南部航空磁辐射测量与数字高程模型（DEM, Digital Elevation Model）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2017年采集，总测线长度达146285线公里，测线间距为200米，地形飞行高度为60米。