Kidson AreaB 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 Kidson AreaB dose rate grid geodetic has a cell size of 0.00083 degrees (approximately 89m) and shows the terrestrial dose rate of the Kidson Areas A & B, WA, 1996. The data used to produce this grid was acquired in 1996 by the WA Government, and consisted of 128005 line-kilometres of data at 400m line spacing and 60m terrain clearance.

辐射测量法（radiometric method，亦称伽马能谱法（gamma-ray spectrometric method））通过探测地球表面附近的伽马射线自然变化，来反映钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射信号。采集所得的数据将通过标准化流程进行处理，以确保所记录的辐射响应仅由地下岩石产生。经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。陆地剂量率网格数据由滤波后的钾、铀、钍网格数据经线性组合生成，随后对该组合得到的网格数据应用低通滤波器，最终生成经滤波后的陆地剂量率网格数据。本次发布的基德森B区大地测量剂量率网格数据，其像元尺寸为0.00083度（约89米），展示了1996年西澳大利亚州（WA）基德森A区与B区的陆地剂量率分布。生成该网格所用的数据由西澳大利亚州政府于1996年采集，总测线长度达128005公里，测线间距为400米，航高为60米。