Jamestown potassium 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 potassium grid has a cell size of 0.00021 degrees (approximately 21m) and shows potassium element concentration of the SMMSP - MagSpec - Jamestown, SA, 2002 (2002/01) in units of percent (or %). The data used to produce this grid was acquired in 2002 by the SA Government, and consisted of 8919 line-kilometres of data at 100m line spacing and 60m terrain clearance.放射性测量法，亦称伽马射线能谱法，该方法通过探测地球表面附近的伽马射线自然变化，来反映钾（K）、铀（U）与钍（Th）发生天然放射性衰变所产生的辐射信号。 所采集的数据将通过标准化流程进行处理，以确保记录的响应信号仅来自地下岩石的辐射。 经处理得到的数据集可通过解译，用以揭示地下地质构造。 经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。 本放射性测量钾元素网格的像元大小为0.00021度（约21米），展示的是南澳大利亚州詹姆斯敦SMMSP-MagSpec项目2002年（2002/01批次）的钾元素浓度数据，单位为百分比（%）。 用于生成该网格的数据由南澳大利亚州政府于2002年采集，数据总测线长度达8919千米，测线间距为100米，飞行离地高度为60米。