GSWA South Officer Basin 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 South Officer Basin doserate grid geodetic has a cell size of 0.00083 degrees (approximately 89m) and shows the terrestrial dose rate of the Officer Basin Northwest, WA, 2006. The data used to produce this grid was acquired in 2006 by the WA Government, and consisted of 105875 line-kilometres of data at 400m line spacing and 70m terrain clearance.

放射测量法（又称伽马射线能谱法 (gamma-ray spectrometric method)）可检测地球表面附近的伽马射线自然变化，此类射线源自钾（K）、铀（U）与钍（Th）的天然放射性衰变。所采集的数据将通过标准化流程进行处理，以确保记录的响应仅来自地下岩石。经处理生成的数据集可通过解译揭示地下地质构造。处理后的数据会由GA地球物理学家进行质量核查，以确保GA发布的最终数据满足使用要求。地面剂量率网格由经滤波后的钾、铀、钍网格线性组合得到，随后对该网格应用低通滤波器 (low pass filter)，生成滤波后的地面剂量率网格。本西澳地质调查局 (GSWA，Geological Survey of Western Australia) 南奥菲尔盆地大地测量剂量率网格的单元尺寸为0.00083度（约89米），展示了2006年西澳州 (Western Australia, WA) 西北部奥菲尔盆地的地面剂量率分布。用于生成该网格的数据由西澳州政府于2006年采集，总测线长度达105875线公里，测线间距为400米，地形离地高度为70米。