GSSA Fowler ppm Uranium 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.This radiometric uranium grid has a cell size of 0.00042 degrees (approximately 43m) and shows uranium element concentration of the Fowler Airborne Magnetic Radiometric and DEM Survey, SA, 2017 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 94903 line-kilometres of data at 200m line spacing and 60m terrain clearance.

放射性测量法（radiometric method，亦称伽马射线能谱法（gamma-ray spectrometric method））通过检测地表附近的伽马射线自然变化开展工作，该变化源于钾（K）、铀（U）和钍（Th）的自然放射性衰变。所采集的数据将通过标准化流程进行处理，以确保记录的响应仅来自地下岩石。经处理得到的数据集可通过解译揭示地下地质构造。经处理的数据需由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应用需求。该放射性铀元素栅格数据的像元大小为0.00042度（约43米），展示了2017年南澳大利亚（SA）福勒航空磁测与放射性测量及数字高程模型（Digital Elevation Model，DEM）调查的铀元素浓度，单位为百万分比（ppm）。本栅格数据由南澳大利亚（SA）政府于2017年采集，总测线长度达94903测线公里，测线间距为200米，飞行离地高度为60米。