Westmoreland 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 Westmoreland Complete Spherical Cap Bouguer 1VD geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Westmoreland-Normanton Gravity Survey (P200840). This gravity survey was acquired under the project No. 200840 for the geological survey of QLD. The grid has a cell size of 0.0074 degrees (approximately 803m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 6414 gravity stations at a spacing between 2000m and 4000m were acquired to produce this grid.

重力数据测量由地球表面以下岩石密度变化引起的重力微小变化。所收集的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。这些结果生成的数据集经解释后可揭示地下地质结构。处理后的数据由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。
这份Westmoreland完整球冠布格1VD大地测量数据是Westmoreland-Normanton重力调查（P200840）完整球冠布格异常网格的一阶垂直导数。该重力调查是在200840号项目下开展的，用于QLD地质调查。该网格的单元格大小为0.0074度（约803米）。快速傅里叶变换（Fast Fourier Transform，FFT）过程被应用于原始网格，以计算一阶垂直导数网格。为生成该网格，共采集了间距在2000米至4000米之间的6414个重力站点。