地面扰动重力垂直梯度的确定

Determination of disturbing gravity vertical gradient in Earth's surface

鉴于扰动重力垂直梯度在大地测量和物探中有重要作用,在未直接测量的情况下,对如何由地面重力异常及地形数据求取扰动垂直梯度进行了研究和分析,认为在被研点附近要求重力点分布密集,且精度不低于1×10-6ms-2;对中央区域积分奇异性问题也作了讨论;此外,扰动重力垂直梯度如何在大地测量和地球物理中进一步得到应用,以及为何用扰动重力垂直梯度代替重力异常垂直梯度也给予了简明的论述.

Based on the important effect of gravity vertical gradient upon geodesy and geophysical prospecting, using gravity anomalies or topographic data for computing above mentioned gradient has been researched and analyzed. It noticed that gravimetry points must be densely distributed in the region near by computed point, and the measurement precision is better than 1 10^-6m · s^-2. Integrating irregularity of center region in adjacent computed point is also discussed. In addition, how to apply gravity gradient to geodesy and geophysics have been concisely demonstrated.