一种新型的航空重力梯度测量数据调平方法

航空重力梯度测量的原始数据包含与测线方向呈强相关性的条带状噪声，该噪声会影响后续数据处理与解释的精度。首先，提出了一种针对重力梯度数据组合调平的方法，旨在去除条带状噪声的干扰。与低通滤波相比，组合调平可以保留更多的异常场细节。与传统的切割线调平相比，组合调平对切割线的依赖更小，可以适用于切割线稀疏的测量地区。最后，以加拿大Diavik地区的实测航空重力梯度数据为例，验证了组合调平方法的应用效果。

A New Combined Leveling Method for Airborne Gravity Gradient Measurement Data

The original data of airborne gravity gradient measurement contains the stripwise noise which is strongly correlated with the direction of the survey line and will affect the accuracy of subsequent data processing and interpretation. In this paper, a combined leveling method for gravity gradient data is proposed to remove the striplike noise interference. Compared with low-pass filtering, combined leveling can preserve more details of outlier field. Compared with traditional cutting line leveling, combined leveling has less dependence on the cutting line and can be applied to the measuring area with sparse cutting line. Finally, the application effect of the combined leveling method is verified by taking the measured aerial gravity gradient data in Diavik, Canada as an example.