SMMSP - MagSpec - Angas Bremer Hills, SA, 2002. (2002/01) (P910), 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 SMMSP - MagSpec - Angas Bremer Hills, SA, 2002. (2002/01) survey were acquired in 2002 by the SA Government, and consisted of 5092 line-kilometres of data at 100m line spacing and 60m 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）数据用于测量地壳中造岩矿物含量差异引起的地球磁场强度变化。磁异常可分为正异常（磁场强于正常值）或负异常（磁场弱于正常值），具体取决于岩石的磁化率。数据通过标准方法处理，以确保记录的响应仅来源于地下岩石。处理结果生成的数据集可通过解释揭示地下地质构造。经处理的数据由GA（澳大利亚地质科学局）地球物理学家进行质量检查，以确保GA发布的最终数据符合预期用途。

这些测线数据集来自2002年南澳大利亚州（South Australia, SA）Angas Bremer Hills地区的SMMSP-MagSpec调查（2002/01），由南澳州政府于2002年采集，包含5092测线公里的数据，测线间距为100米，地形净空高度为60米。为约束数据中的长波长成分，研究采用了独立的全国航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据，以控制本次调查数据的基准面。本次调查数据已基本与AWAGS数据进行了水准化处理。