Dubbo thorium 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, uranium and thorium. The data are collected on airborne geophysical surveys conducted by Commonwealth, State & NT Governments and the private sector.

放射测量法（radiometric method）或伽马射线能谱法（gamma-ray spectrometric method）可检测地球表面附近探测到的伽马射线的自然波动，此类波动由钾、铀和钍的天然放射性衰变引发。本数据集的数据采集自联邦、各州及北领地政府与私营部门开展的航空地球物理调查。