Mildura, Vic, 1994 VIMP Survey (GSV3019) (P638), radiometric line data, AWAGS levelled

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 Mildura, Vic, 1994 VIMP Survey (GSV3019) (P638), radiometric line data, AWAGS levelled were acquired in 1994 by the VIC Government, and consisted of 51663 line-kilometres of data at 400m line spacing and 80m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

放射性能谱法（radiometric，亦称伽马射线能谱法）可探测地球表面附近的伽马射线自然变化，此类变化源于钾（K）、铀（U）和钍（Th）的天然放射性衰变。所采集的数据将通过标准流程处理，以确保记录的响应仅源自地下岩石。经处理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要求。本次数据集为维多利亚州米尔迪拉地区1994年VIMP测量（GSV3019）（P638）项目的伽马射线能谱测线数据，已完成全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）基准校正，于1994年由维多利亚州政府采集。该数据集总测线长度达51663线公里，测线间距为400米，飞行离地高度为80米。为抑制数据中的长波长信号分量，项目采用独立数据集——全澳航空地球物理调查（AWAGS）航空磁测数据，对本次测量数据的基准值进行管控。本测量数据本质上已基于AWAGS完成基准校正。