Millingimbi, NT,1992 (P601), magnetic line data, AWAGS levelled

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data 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. These line dataset from the Millingimbi, NT,1992 survey were acquired in 1992 by the NT Government, and consisted of 100949 line-kilometres of data at 500m line spacing and 100m 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.

总磁强度（Total Magnetic Intensity, TMI）数据用于测量地壳内造岩矿物含量差异引发的地球磁场强度变化。磁异常可分为正异常（磁场强度高于正常值）与负异常（磁场强度低于正常值），具体取决于岩石的磁化率。该数据通过标准流程处理，以确保记录的响应仅源自地下岩石。处理后得到的数据集可通过解译揭示地下地质结构。经GA的地球物理学家开展质量核查，确保GA发布的最终数据满足既定使用要求。本次航线数据集源自1992年北领地（NT）米灵姆比（Millingimbi）勘测项目，由NT政府于1992年采集，测线总长度达100949千米，测线间距为500米，飞行离地高度为100米。为约束数据中的长波长分量，本次勘测数据的基准水平由独立数据集——全澳航空地球物理勘测（Airborne Geophysical Survey, AWAGS）航空磁数据——进行校正。本勘测数据实质上已校准至AWAGS基准。