GSNSW Southern Darling Basin 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 Southern Darling Basin dose rate grid geodetic has a cell size of 0.00082 degrees (approximately 84m) and shows the terrestrial dose rate of the Southern Darling Basin Airborne Survey, NSW, 2005. The data used to produce this grid was acquired in 2005 by the NSW Government, and consisted of 18763 line-kilometres of data at 400m line spacing and 60m terrain clearance.

放射测量法（或称伽马射线能谱法）通过探测地表附近因钾（K）、铀（U）和钍（Th）自然放射性衰变产生的伽马射线，测量其天然波动。所采集的数据将通过标准流程处理，以确保记录的响应仅源于地下岩石。
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发布的最终数据满足使用要求。
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，并对该网格应用低通滤波器，得到滤波后的地表剂量率网格。
本次发布的GSNSW南部达令盆地大地测量地表剂量率网格像元尺寸为0.00082度（约84米），展示了2005年新南威尔士州（NSW）南部达令盆地航空测量的地表剂量率分布。
用于生成该网格的数据由新南威尔士州政府于2005年采集，涵盖18763公里测线数据，测线间距为400米，离地高度为60米。