Eucla Central 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 Central Gravity Complete Spherical Cap Bouguer 1VD Geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Eucla Central Gravity Survey (P201163). This gravity survey was acquired under the project No. 201163 for the geological survey of WA. The grid has a cell size of 0.005 degrees (approximately 516m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 5706 gravity stations at 2500m spacing were acquired to produce this grid.

重力数据用于测量地球表面下方岩石密度变化所引发的微小重力场变化。所采集的原始数据将通过标准流程进行处理，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揭示地下地质构造。经处理的数据需由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。本次发布的欧克拉中央重力完整球冠布格1VD大地测量数据集，是欧克拉中央重力测量项目（编号P201163）对应的完整球冠布格异常网格的一阶垂直导数数据。该重力测量工作由编号为201163的项目承揽，服务于西澳大利亚州（Western Australia, WA）的地质调查。该网格的单元尺寸为0.005度（约合516米）。研究人员对原始重力网格应用快速傅里叶变换（Fast Fourier Transform, FFT）算法，以计算得到一阶垂直导数网格。本次共采集了5706个间距为2500米的重力测点，以此生成该网格数据。