Goulburn 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 0.00052 degrees (approximately 53m) and shows uranium element concentration of the Goulburn, NSW, 1996 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1996 by the NSW Government, and consisted of 69424 line-kilometres of data at 250m line spacing and 80m terrain clearance.

放射性测量法（radiometric method），又称伽马能谱法（gamma-ray spectrometric method），通过探测地表附近的伽马射线自然涨落，获取由钾（K）、铀（U）与钍（Th）自然放射性衰变产生的辐射信号。所采集的数据将通过标准流程进行预处理，以确保记录的响应信号仅来源于地下岩石的放射性衰变。经处理后得到的数据集可用于解译，以揭示地下地质构造。预处理后的数据将由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使用要求。本次放射性铀元素网格数据的单元尺寸为0.00052度（约合53米），展示了1996年新南威尔士州（New South Wales，简称NSW）古尔本（Goulburn）区域的铀元素浓度，单位为百万分率（parts per million，简称ppm）。用于生成该网格的数据由新南威尔士州政府于1996年采集，数据总覆盖长度达69424线公里，测线间距为250米，飞行离地高度为80米。