Tallaringa-Coober Pedy, SA, 1958 (P196), 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 Tallaringa-Coober Pedy, SA, 1958 survey were acquired in 1958 by the SA Government, and consisted of 11867 line-kilometres of data at 1600m line spacing and 150m 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）数据用于测量由地壳内造岩矿物成分差异所引起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。该数据通过标准化方法进行处理，以确保所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使用要求。本次1958年塔拉林加-库伯佩迪（南澳大利亚州）测线数据集由南澳大利亚州政府于1958年采集，总测线长度达11867线公里，测线间距为1600米，飞行离地高度为150米。为约束数据中的长波长分量，本次调查数据以独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——作为基准进行平差，本次调查数据已基本匹配AWAGS基准。