GSNSW Exploration NSW Area U Southern Peel 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 GSNSW Exploration NSW Area U Southern Peel dose rate grid geodetic has a cell size of 0.00048 degrees (approximately 50m) and shows the terrestrial dose rate of the NSW DMR, Discovery 2000, AREA U, SOUTHERN PEEL, NSW 2001. The data used to produce this grid was acquired in 2001 by the NSW Government, and consisted of 31584 line-kilometres of data at 250m line spacing and 80m terrain clearance.

放射性测量法（radiometric method），又称伽马射线能谱法，可检测地球表面附近因钾（K）、铀（U）与钍（Th）自然放射性衰变所产生的伽马射线自然变化。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源于地下岩石。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。地表剂量率网格通过滤波后的钾、铀、钍网格的线性组合生成，随后对该网格应用低通滤波器，得到滤波后的地表剂量率网格。本大地测量地表剂量率网格为GSNSW勘探项目新南威尔士州U区域南皮尔地区数据集，格网单元尺寸为0.00048度（约50米），展示了2001年新南威尔士州DMR、Discovery 2000、U区域、南皮尔地区的地表剂量率分布。本网格的制作数据由新南威尔士州政府于2001年采集，包含31584线公里的测量数据，测线间距为250米，地形离地高度为80米。