航空矢量重力测量水平分量向下延拓的输入输出法

Downward Continuation of Horizontal Component in Airborne Vector Gravimetry Using Input Output System

研究航空矢量重力水平分量向下延拓的输入输出法,并以EGM2008计算的东向分量为例进行仿真实验,在不同的噪声水平下对比分析单输入单输出法和双输入单输出法的向下延拓效果。实验结果表明,当东向分量的精度为1.5mGal时,单输入单输出法和双输入单输出法均能实现稳定向下延拓;当东向分量的精度为6mGal时,单输入单输出法的延拓效果不可靠,而双输入单输出法能实现稳定向下延拓。

We discuss the downward continuation of the horizontal component in airborne vector gravimetry using input output system,and the east component is taken as an example for a simulation test.Under different noise levels,the continued results of single-input single-output systems and double-input single-output systems are compared.The results indicate that steady downward continuation of the high precision east component can be realized using both input methods,while that of the lower precision east component can only be achieved by double-input single-output system.