摘要
针对航空重力测量数据事后处理的特点,基于窗函数法设计了FIR数字滤波器。数据处理结果表明:FIR数字滤波器具有精确的线性相位,滤波过程稳定;设计方法简单,易于上机实现;在滤波过程中卷积运算能够部分降低傅立叶变换中的栅栏效应。
Considering the characteristics of the processing of aerial gravimetry data, a FIR digital filter based on the window function is designed. The results show that FIR digital filter has accurate linearity phase and its filtering process is steady and the method is simple and easy to be realized on the computer. The barrier phenomena in the Fourier transform can be partially reduced by the convolution integral in the process of filtering.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第6期130-132,138,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40774031)
军事测绘任务"中国及周边重力场精化"项目基金
关键词
傅立叶变换
卷积
FIR数字滤波
航空重力数据
栅栏效应
Fourier transform
convolution integral
FIR digital filter
aerial gravity data
barrier phenomena
