GSNSW Exploration NSW Area H Cargelligo Narrandera total count 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 H Cargelligo Narrandera total count grid geodetic has a cell size of 0.00049 degrees (approximately 50m) and shows the terrestrial dose rate of the NSW DMR, Discovery 2000, Cargelligo/Narrandera, AREA H, 1995. The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 123700 line-kilometres of data at 250m line spacing and 60m terrain clearance.

放射性测量法（又称伽马能谱法）通过探测地球表面附近因钾（K）、铀（U）和钍（Th）自然放射性衰变产生的伽马射线，量化其天然波动情况。所采集的数据将通过标准化流程处理，以确保记录的响应仅源于地下岩石。经处理得到的数据集可通过解译，揭示地下地质构造。经处理的数据会由GA地球物理学家开展质量核验，确保GA发布的最终数据满足使用需求。地面剂量率网格由经过滤波处理的钾、铀、钍网格经线性组合生成，随后对该网格施加低通滤波器，即可得到滤波后的地面剂量率网格。本次GSNSW新南威尔士州H区域（卡格利戈/纳兰德拉）勘探总计数大地测量网格，像元尺寸为0.00049度（约50米），展示了1995年新南威尔士州矿产资源局（NSW DMR）、Discovery 2000项目、卡格利戈/纳兰德拉H区域的地面剂量率分布。用于生成该网格的数据由新南威尔士州政府于1995年采集，总计123700线公里，测线间距为250米，地形离地高度为60米。