GSQ Rockhampton Monto Qld total count 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 GSQ Rockhampton Monto Qld total count grid geodetic has a cell size of 0.00096 degrees (approximately 102m) and shows the terrestrial dose rate of the Rockhampton 1 & 2, Monto & Munduberra, 1994-1995, Qld,AIRDATA. The data used to produce this grid was acquired in 1994 by the QLD Government, and consisted of 156236 line-kilometres of data at 400m 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），可通过探测地球表面附近的伽马射线自然变化，反映钾（K）、铀（U）及钍（Th）的天然放射性衰变产生的辐射信号。收集到的数据将通过标准流程进行处理，以确保记录的响应仅源于地下岩石的辐射。经处理后的数据集可通过解译揭示地下地质构造。处理后的数据将由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需求。地表剂量率网格（terrestrial dose rate grid）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（low pass filter），即可得到滤波后的地表剂量率网格。本GSQ昆士兰州罗克汉普顿、蒙托区域大地测量总计数网格的像元大小为0.00096度（约102米），展示了1994-1995年昆士兰州（QLD）罗克汉普顿1号、2号测区及蒙托、蒙杜贝拉区域的AIRDATA航空地表剂量率分布。本网格所用数据由昆士兰州政府于1994年采集，总测线长度达156236线公里，测线间距为400米，飞行离地高度为80米。