(中南大學(xué) 地球科學(xué)與信息物理學(xué)院，長(zhǎng)沙 410083)
摘 要: 利用重力梯度張量具有高精度的特點(diǎn)以及解析信號(hào)在確定異常體位置上的優(yōu)勢(shì)，將解析信號(hào)應(yīng)用于重力場(chǎng)中，研究重力梯度張量解析信號(hào)振幅及其一階導(dǎo)數(shù)的極值位置空間變換規(guī)律，為重力場(chǎng)解析信號(hào)邊緣和位置識(shí)別提供理論基礎(chǔ)。對(duì)模型的正演試算結(jié)果表明：使用重力梯度張量的解析信號(hào)能準(zhǔn)確地判斷地下異常體源的位置情況，有效規(guī)避背景場(chǎng)的影響。
關(guān)鍵字: 重力梯度張量；解析信號(hào)；正演模擬
（School of Geosciences and Info-Physics, Central South University, Changsha 410083, China）
Abstract: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.
Key words: gravity gradient tensor; analytic signal; forward simulation
