West Arunta 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 West Arunta Complete Spherical Cap Bouguer 1VD Geodetic is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the West Arunta Gravity Survey, 2010 (P201080). This gravity survey was acquired under the project No. 201080 for the geological survey of NT. The grid has a cell size of 0.00747 degrees (approximately 799m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 12428 gravity stations at a spacing between 1000m and 4000m 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所引发的微小重力场变化。所采集的原始数据将通过标准处理流程进行预处理，以确保所记录的响应仅源自地下岩石。经处理得到的数据集可通过解译揭示地下深部的地质构造特征。预处理后的数据将由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实际使用需求。西阿龙塔完整球冠布格1VD测地数据集（West Arunta Complete Spherical Cap Bouguer 1VD Geodetic）是2010年西阿龙塔重力测量（项目编号P201080）所生成的完整球冠布格异常网格的一阶垂直导数结果。本次重力测量依托编号为201080的项目开展，用于北领地（NT）的地质调查工作。该网格的单元尺寸为0.00747度（约合799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。为生成该网格，本次测量共获取12428个重力测点，测点间距介于1000米至4000米之间。