重力梯度张量解析信号的正演模拟

Forward simulation of analytic signals of gravity gradient tensor

利用重力梯度张量具有高精度的特点以及解析信号在确定异常体位置上的优势,将解析信号应用于重力场中,研究重力梯度张量解析信号振幅及其一阶导数的极值位置空间变换规律,为重力场解析信号边缘和位置识别提供理论基础。对模型的正演试算结果表明:使用重力梯度张量的解析信号能准确地判断地下异常体源的位置情况,有效规避背景场的影响。

By utilizing the characteristics of high precision of gravity gradient tensor data, the advantage of using the analytic signal method to determine the position of source, and applying analytic signals to gravity field, the extreme value position and the spatial variation rules of analytic signals amplitude of gravity gradient tensor and the its first-order derivative were investigated, and a theoretical basis for identifying edge and position of gravity field analytical signal was provided. The forward trial results show that using analytic signals of gravity gradient tensor can determine the position of the underground abnormal body source accurately, and avoid background field effectively.