Innamincka Strzelecki 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 Innamincka Strzelecki dose rate grid geodetic has a cell size of 0.00083 degrees (approximately 87m) and shows the terrestrial dose rate of the Innamincka, Strzelecki, SA, 1997. The data used to produce this grid was acquired in 1997 by the SA Government, and consisted of 91998 line-kilometres of data at 400m line spacing and 80m terrain clearance.

放射测量法（radiometric），亦称伽马射线能谱法（gamma-ray spectrometric），可探测地球表面附近的伽马射线自然变化，该变化源于钾（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流程进行处理，以确保记录的辐射响应仅源自地下岩石。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（terrestrial dose rate grid）通过滤波后的钾、铀、钍网格的线性组合生成，随后对该网格应用低通滤波器（low pass filter），得到滤波后的陆地剂量率网格。本次的因纳明卡-斯特雷勒基（Innamincka Strzelecki）大地测量剂量率网格，其像元大小为0.00083度（约87米），展示了1997年南澳大利亚州（SA）因纳明卡与斯特雷勒基区域的陆地剂量率分布。用于生成该网格的数据由南澳大利亚州政府于1997年采集，总测线覆盖长度达91998测线公里，测线间距为400米，离地高度为80米。