摘要
The authors design IIR (Infinite Impulse Response) lowpass digital filters based on Butterworth and Chebyshev approach, do the experiment research of filtering GT-1A airborne gravity data, and get some meaningful results. By selecting proper parameters such as passband and stopband attenuation, these IIR lowpass digital filters for airborne gravity data can get satisfactory filtering effect almost as good as GT-1A result.