Gove 2, NT, 1991 (P552), 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 Gove, NT, 1991 survey were acquired in 1991 by the NT Government, and consisted of 49539 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.

总磁场强度（Total Magnetic Intensity, TMI）数据用于量化地壳中成岩矿物成分差异所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），其类型取决于岩石的磁化率。该数据集通过标准化处理流程开展处理，以确保所记录的磁场响应仅源于地下岩石。经处理后得到的数据集可通过解译揭示地下地质结构。经处理的数据由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实际应用需求。本次测线数据集源自1991年北领地（Northern Territory, NT）戈夫地区的航磁测量项目，由北领地政府于1991年完成数据采集，总测线长度达49539千米，测线间距为500米，作业航高为100米。为约束数据中的长波长成分，研究人员采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——对本次航磁测量数据的基准水平进行校正。本次测量数据已基本校正至AWAGS基准体系。