Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD

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. This Sir Samuel Throssell Gravity Survey P201460 SCBA267 1VD is the first vertical derivative of the spheical cap Bouguer anomaly grid for the Sir Samuel Throssell Gravity Survey (P201460). This gravity survey was acquired under the project No. 201460 for the geological survey of WA. The grid has a cell size of 0.00477 degrees (approximately 499m). A total of 11659 gravity stations at 2500m spacing were acquired to produce this grid. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

重力数据用于测量因地表下方岩石密度变化而产生的微小重力变化。所采集的数据通过标准方法进行处理，以确保记录的响应仅由地下岩石引起。最终生成的数据集可通过解译揭示地下地质构造。
本数据集为“塞缪尔·特罗斯尔爵士重力测量（Sir Samuel Throssell Gravity Survey）P201460 SCBA267 1VD”，系该重力测量（项目编号P201460）的球冠布格异常网格的一阶垂直导数数据。该重力测量为西澳大利亚州（WA）地质调查项目，项目编号为201460。
该网格的单元格分辨率为0.00477度（约499米）。为生成该网格，共采集了11659个间距为2500米的重力测点。
研究人员对原始网格应用快速傅里叶变换（Fast Fourier Transform, FFT）以计算一阶垂直导数网格。
经处理的数据已由GA地球物理学家开展质量核查，确保GA发布的最终数据符合使用要求。