MRTAS Mathinna totalcount 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 MRTAS Mathinna totalcount grid geodetic has a cell size of 0.0005 degrees (approximately 49m) and shows the terrestrial dose rate of the NETGOLD - Mathinna, Tas , 1990. The data used to produce this grid was acquired in 1990 by the TAS Government, and consisted of 1680 line-kilometres of data at 150m line spacing and 80m 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，表征钾（K）、铀（U）与钍（Th）天然放射性衰变产生的辐射信号。所采集的数据将采用标准化流程处理，以确保记录的辐射响应仅源自地下岩石。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需求。地面剂量率网格由滤波后的钾、铀、钍网格经线性组合生成，随后对该网格施加低通滤波处理，得到滤波后的地面剂量率网格。此MRTAS马蒂纳总计数大地测量网格的单元尺寸为0.0005度（约49米），展示了1990年塔斯马尼亚州（Tas）马蒂纳（Mathinna）地区NETGOLD项目的地面剂量率分布。用于生成该网格的数据由塔斯马尼亚州政府（TAS Government）于1990年采集，测线总长度达1680千米，测线间距为150米，作业时地形离地高度为80米。