物探与化探
物探與化探
물탐여화탐
GEOPHYSICAL AND GEOCHEMICAL EXPLORATION
2010年
1期
74-78
,共5页
航空重力测量%FIR低通数字滤波器%窗函数%重力异常提取
航空重力測量%FIR低通數字濾波器%窗函數%重力異常提取
항공중력측량%FIR저통수자려파기%창함수%중력이상제취
airborne gravimetry%digital lowpass FIR-filter%window function%extraction of gravity anomaly
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.结合一组实测的航空重力测量数据,讨论FIR低通数字滤波器截止频率和滤波器长度的确定方法,研究了无效数据的删除方法;通过比较不同窗函数设计的滤波器的数据处理性能,得出了在航空重力测量数据处理中,汉宁窗和海明窗设计FIR低通数字滤波器可以满足重力场信息提取的要求.
航空重力測量數據中含有大量的譟聲,需要採用FIR低通濾波器來提取實際的重力異常信息.結閤一組實測的航空重力測量數據,討論FIR低通數字濾波器截止頻率和濾波器長度的確定方法,研究瞭無效數據的刪除方法;通過比較不同窗函數設計的濾波器的數據處理性能,得齣瞭在航空重力測量數據處理中,漢寧窗和海明窗設計FIR低通數字濾波器可以滿足重力場信息提取的要求.
항공중력측량수거중함유대량적조성,수요채용FIR저통려파기래제취실제적중력이상신식.결합일조실측적항공중력측량수거,토론FIR저통수자려파기절지빈솔화려파기장도적학정방법,연구료무효수거적산제방법;통과비교불동창함수설계적려파기적수거처이성능,득출료재항공중력측량수거처리중,한저창화해명창설계FIR저통수자려파기가이만족중력장신식제취적요구.
There is a lot of noise in the data observed by airborne gravimeter. Digital lowpass FIR-filter is needed to extract the factual gravity field information from such data. Based on a set of real data of airborne gravimetry, the authors dealt with the determination of the cutoff frequency and filter length of the digital lowpass FIR-filter, and studied the method for deleting ineffectual data. Based on a comparison of the capabilities of filters designed by different window functions, it is concluded that, in airborne gravimetry, the digital lowpass FIR-filter designed by Hanning window and Hamming window can meet the requirement of extracting the gravity field information.
