Medusa Banks Port Keats 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 Medusa Banks Port Keats total count grid geodetic has a cell size of 0.001 degrees (approximately 109m) and shows the terrestrial dose rate of the Medusa Banks, Port Keats, WA, 1994. The data used to produce this grid was acquired in 1994 by the WA Government, and consisted of 68378 line-kilometres of data at 500m line spacing and 100m terrain clearance.

辐射测量法（或伽马射线能谱法）通过探测地球表面附近因钾（K）、铀（U）和钍（Th）天然放射性衰变产生的伽马射线自然变化实现相关测量。采集所得数据将通过标准流程进行处理，确保记录的响应仅源于地下岩石。由此得到的数据集可通过解译揭示地下地质构造。处理后的数据由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预设使用要求。陆地剂量率网格由滤波后的钾、铀、钍网格经线性组合得到，随后对该网格应用低通滤波器，生成滤波后的陆地剂量率网格。本次的美杜莎班克斯-皮茨港总计数大地测量网格像元尺寸为0.001度（约109米），展示了1994年西澳大利亚州皮茨港美杜莎班克斯区域的陆地剂量率。用于生成该网格的数据由西澳大利亚州政府于1994年采集，包含68378线公里、线间距500米、地形离地高度100米的勘测数据。