Lawn Hill Gravity Survey p201840 CSCBA267GUVD

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 Lawn Hill Gravity Survey p201840 CSCBA267GUVD is the first vertical derivative of the complete spherical cap Bouguer anomaly grid for the Lawn Hill Gravity Survey 2018 (P201840). This gravity survey was acquired under the project No. 201840 for the geological survey of QLD. The grid has a cell size of 0.00185 degrees (approximately 200m). A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid. A total of 7231 gravity stations at 1000m 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所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，揭示地下地质构造特征。经GA地球物理学家对处理后的数据开展质量核查，以确保GA发布的最终数据符合使用要求。
本Lawn Hill重力测量数据集（编号p201840，标识CSCBA267GUVD）为2018年Lawn Hill重力测量（P201840）完整球冠布格异常网格的一阶垂直导数结果。
本次重力测量是为昆士兰州（QLD）地质调查项目，于编号201840的项目框架下采集完成的。
该网格的单元尺寸为0.00185度（约合200米）。
通过对原始网格应用快速傅里叶变换（Fast Fourier Transform, FFT）流程，计算得到该一阶垂直导数网格。
为生成该网格，共采集了7231个间距为1000米的重力测点。