Angas Bremer Plains dose 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 Angas Bremer Plains dose grid geodetic has a cell size of 0.00021 degrees (approximately 21m) and shows the terrestrial dose rate of the SMMSP - MagSpec - Angas Bremer Plains, SA, 2002 (2002/01). The data used to produce this grid was acquired in 2002 by the SA Government, and consisted of 7535 line-kilometres of data at 100m line spacing and 60m terrain clearance.

放射性测量法（radiometric method，或称伽马能谱法（gamma-ray spectrometric method））通过探测地表附近因钾（K）、铀（U）和钍（Th）发生天然放射性衰变（natural radioactive decay）所产生的伽马射线，测定其天然强度变化。所采集的数据将通过标准处理流程（standard methods）进行处理，确保记录到的响应仅源于地下岩石。经处理后可生成数据集，通过解译这些数据集能够揭示地下地质构造。所有经处理的数据均由GA地球物理学家（GA geophysicists）开展质量核查，以确保GA发布的最终数据符合使用要求（fit-for-purpose）。地表剂量率网格（terrestrial dose rate grid）通过滤波后的钾、铀、钍网格的线性组合（linear combination）得到，随后对该网格应用低通滤波器（low pass filter），生成滤波后的地表剂量率网格。
本安加斯·布雷默平原大地坐标剂量格网（dose grid geodetic）的格网单元尺寸（cell size）为0.00021度（约21米），展示了2002年（2002/01）南澳大利亚州（SA）SMMSP - MagSpec - 安加斯·布雷默平原的地表剂量率。用于生成该格网的数据由南澳大利亚州政府于2002年采集，涵盖7535测线公里数（line-kilometres）的观测数据，测线间距（line spacing）为100米，飞行离地高度（terrain clearance）为60米。