Radiometric Grid of Australia (Radmap) v4 2019 ratio uranium over potassium

The uranium over potassium grid is a derivative of the 2019 radiometric or gamma-ray grid of Australia comprising over 600 airborne gamma-ray spectrometric surveys. 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 are collected on airborne geophysical surveys conducted by Commonwealth, State and Northern Territory Governments and the private sector.The 2019 uranium over potassium grid has a cell size of about 100 m (0.001 degrees) and is derived from the filtered uranium and potassium grids.

铀钾比值格网（uranium over potassium grid）是2019年澳大利亚放射性测量（或伽马射线）格网（radiometric or gamma-ray grid）的衍生产品，该格网整合了600余项航空伽马能谱测量调查（airborne gamma-ray spectrometric surveys）的数据。放射性测量法（radiometric method）或伽马能谱测量法（gamma-ray spectrometric method）通过检测地球表面附近的伽马射线，测量由钾（K）、铀（U）和钍（Th）的自然放射性衰变（natural radioactive decay）所引起的伽马射线自然变化。这些数据来源于联邦、州及北领地政府与私营部门开展的航空地球物理调查（airborne geophysical surveys）。2019年铀钾比值格网的像元大小（cell size）约为100米（0.001度），由经过滤波处理的铀格网（uranium grid）和钾格网（potassium grid）衍生而来。