Fowler's Gap, Corona, NSW, Broken Hill Exploration Init., 1995 (P642), 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 Fowler's Gap, Corona, NSW, Broken Hill Exploration Init., 1995 survey were acquired in 1995 by the NSW Government, and consisted of 47943 line-kilometres of data at a line spacing between 100m and 100m, 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。磁异常根据岩石的磁化率（susceptibility）可分为正异常（磁场强于正常水平）和负异常（磁场弱于正常水平）。数据通过标准方法处理，以确保记录的响应仅源于地下岩石。处理结果生成的数据集可通过解释揭示地下地质结构。经处理的数据由GA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。

这些来自1995年新南威尔士州（NSW）布罗肯希尔勘探计划（Broken Hill Exploration Init.）科罗纳（Corona）地区福勒山口（Fowler's Gap）调查的测线数据集，由新南威尔士州政府于1995年获取，包含47943测线公里的数据，测线间距为100米，地形净空高度（terrain clearance）为60米。为了约束数据中的长波长成分，研究使用了一个独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）的航空磁测数据——来控制该调查数据的基准面。该调查数据本质上已与AWAGS数据进行了水准化处理。