Flinders Ranges dose rate grid geodetic

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 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 terrestrial dose rate grid. This Flinders Ranges dose rate grid geodetic has a cell size of 0.00042 degrees (approximately 43m) and shows the terrestrial dose rate of the Flinders Ranges, SA, 1998. The data used to produce this grid was acquired in 1999 by the SA Government, and consisted of 127752 line-kilometres of data at a line spacing between 200m and 400m, and 60m terrain clearance.放射性测量法（亦称伽马能谱法，gamma-ray spectrometric method）通过检测地球地表附近的伽马射线自然波动，来反映钾（K）、铀（U）及钍（Th）的天然放射性衰变所引发的辐射信号。所采集的数据将通过标准化流程开展处理，以确保记录到的响应仅来自地下岩石的辐射。经处理得到的数据集可通过解译，揭示地下地质构造特征。 经处理的数据将由GA地球物理学家开展质量核查，以确保GA发布的最终数据符合使用要求。 陆地剂量率网格由滤波后的钾、铀、钍网格线性组合生成，随后对该网格施加低通滤波器（low pass filter），得到滤波后的陆地剂量率网格。 本弗林德斯岭大地测量剂量率网格的单元尺寸为0.00042度（约合43米），呈现了1998年南澳大利亚州（SA）弗林德斯岭的陆地剂量率分布情况。 本网格的制作数据由南澳大利亚州政府于1999年采集，总测线里程达127752线公里，测线间距介于200米至400米之间，飞行离地高度为60米。