There is a lot of noise in the data observed by airborne gravimeter. Digital lowpass FIRfilter is needed to extract the factual gravity field information from such data.
航空重力测量数据中含有大量的噪声，需要采用FIR低通滤波器来提取实际的重力异常信息。
2
The lowpass filter in the CCD readout circuit inevitably results in information distortion of pixel crosstalk while improving the system signal-to-noise.
CCD读出电路中低通滤波器在改善系统输出信噪比的同时，不可避免地会产生像素串扰，造成信息畸变。
3
Noise, High Frequency, Order Linear Phase Lowpass Filter.