Eucla Southwest Gravity Complete Spherical Cap Bouguer 1VD Geodetic

Gravity data measure small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected 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.This Eucla Southwest Gravity Complete Spherical Cap Bouguer 1VD Geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Eucla South West Gravity Survey (P201162). This gravity survey was acquired under the project No. 201162 for the geological survey of WA. The grid has a cell size of 0.005 degrees (approximately 513m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 3800 gravity stations at 2500m spacing were acquired to produce this grid.

重力数据用于监测地球表层下方岩石密度变化所引发的微小重力场变化。所采集的重力数据将通过标准流程开展处理，以确保记录的响应仅源于地下岩石的影响。经处理后得到的数据集可通过解译，用以揭示地下地质构造。经处理的数据将由GA地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。本欧克拉西南重力完整球冠布格1VD大地测量数据集，为欧克拉西南重力调查（P201162）所生成的完整球冠布格异常网格的一阶垂直导数。本次重力调查由编号为201162的项目立项实施，用于西澳大利亚州（Western Australia, WA）的地质调查工作。该网格的单元尺寸为0.005度（约合513米）。研究人员对原始网格实施了快速傅里叶变换（Fast Fourier Transform, FFT）处理，以计算得到一阶垂直导数网格。为生成该网格，共采集了3800个间距为2500米的重力测点。