5028 Block 3 (Northwest) reduced magnetic point-located data

GENERAL Total Magnetic Intensity (TMI) data measures variations in the intensity of the Earth's magnetic field, which includes the fields associated with the Earth's core, diurnal variations, and the magnetism of rocks in the Earth's crust. TMI data is used for geological mapping, mineral exploration, and environmental studies. REDUCED DATA The reduced point-located data are processed to highlight the response of the subsurface geology in the Earth’s crust. It has the following reductions applied: 1. Compensated for manoeuvre noise and heading error. 2. Diurnal correction. 3. Geomagnetic Reference Field correction. 4. Tie-line levelling. 5. Micro-levelling. This line dataset from the Narryer survey were acquired in 2024 by the WA Government, and consisted of 415090 line-kilometres of data at 100m line spacing and 50m terrain clearance.总磁场强度（Total Magnetic Intensity, TMI）数据用于测量地球磁场强度的变化，其信号来源包括地核产生的基础磁场、地球磁场的日变扰动以及地壳岩石的天然磁性。总磁场强度数据可应用于地质填图、矿产勘探与环境研究。 经校正优化的点位定位数据经过了针对性处理，以突出地壳地下地质体的磁响应特征。本次数据应用了以下五项校正步骤： 1. 航行噪声与航向误差补偿； 2. 日变校正； 3. 地磁参考场（Geomagnetic Reference Field）校正； 4. 联络线平差； 5. 微平差。 本次源自纳里耶（Narryer）测量项目的航线数据集由西澳大利亚州政府（WA Government）于2024年采集完成，数据总测线长度达415090线公里，采用100米的测线间距与50米的离地飞行高度。