MRTAS Arthur Pieman totalcount 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 MRTAS Arthur Pieman totalcount grid geodetic has a cell size of 0.00042 degrees (approximately 41m) and shows the terrestrial dose rate of the Arthur-Pieman Area, NW Tasmania, TAS, 1996. The data used to produce this grid was acquired in 1996 by the TAS Government, and consisted of 17093 line-kilometres of data at a line spacing between 100m and 200m, and 90m terrain clearance.

辐射测量法（又称伽马射线能谱法）可检测地球表面附近的伽马射线自然变化，这类射线源于钾（K）、铀（U）与钍（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源于地下岩石的辐射。经处理后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需求。地面剂量率网格通过滤波后的钾、铀、钍网格的线性组合生成，随后对该网格应用低通滤波器，得到滤波后的地面剂量率网格。本大地测量型MRTAS Arthur Pieman总计数网格的像元大小为0.00042度（约41米），展示了1996年塔斯马尼亚州（TAS）西北部Arthur-Pieman区域的地面剂量率。本网格的制作数据由塔斯马尼亚州政府于1996年采集，数据涵盖17093线公里的测量数据，测线间距介于100米至200米之间，航空测量离地高度为90米。