GSWA Kalgoorlie East Doserate 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 GSWA Kalgoorlie East Doserate Grid Geodetic has a cell size of 0.00021 degrees (approximately 22m) and shows the terrestrial dose rate of the Kalgoorlie East, WA, 2013. The data used to produce this grid was acquired in 2013 by the WA Government, and consisted of 121572 line-kilometres of data at 100m line spacing and 50m terrain clearance.

放射性（伽马射线能谱）测量法通过探测地球表面附近的伽马射线自然变化，以反映钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射信号。所采集的数据将通过标准化流程进行处理，以确保记录的辐射信号仅源自地下岩石。经处理得到的数据集可用于解译，以揭示地下地质构造。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发布的最终数据满足使用需求。
地表剂量率网格通过经滤波的钾、铀、钍网格的线性组合生成，随后对该网格施加低通滤波，得到滤波后的地表剂量率网格。
本GSWA（西澳大利亚州地质调查局，Geological Survey of Western Australia）卡尔古利东部大地测量剂量率网格的单元尺寸为0.00021度（约22米），展示了2013年西澳大利亚州（Western Australia，WA）卡尔古利东部地区的地表剂量率分布。用于生成该网格的数据由西澳大利亚州政府于2013年采集，涵盖121572线公里的测量数据，测线间距为100米，航空测量离地高度为50米。