Eucla East 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 East Gravity Complete Spherical Cap Bouguer 1VD Geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Eucla East Gravity Survey (P201164). This gravity survey was acquired under the project No. 201164 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 5202 gravity stations at 2500m spacing were acquired to produce this grid.

重力数据用于测量地球表层下方岩石密度变化引发的微小重力场变化。所采集的数据将通过标准流程进行处理，以确保记录到的响应仅源于地下岩石的影响。经处理得到的数据集可通过解译揭示地下地质构造。经处理的数据需经GA地球物理学家开展质量核验，以确保GA发布的最终数据满足实际使用需求。
本次Eucla East Gravity Complete Spherical Cap Bouguer 1VD Geodetic（尤克拉东部重力完整球冠布格1VD大地测量数据集）为针对Eucla East重力测量项目（编号P201164）所生成的完整球冠布格异常网格的一阶垂直导数成果。该重力测量工作为开展西澳大利亚州（Western Australia, WA）地质调查而实施，依托编号为201164的项目推进。该网格的单元尺寸为0.005度（约合516米）。研究人员对原始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。本次网格的生成共计依托5202个间距为2500米的重力测点完成。