| 航空重力测量中FIR低通滤波器的比较 |
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| 引用本文： | 蔡劭琨,吴美平,张开东.航空重力测量中FIR低通滤波器的比较[J].物探与化探,2010,34(1):74-78. |
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| 作者姓名： | 蔡劭琨 吴美平 张开东 |
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| 作者单位： | 国防科学技术大学,机电工程与自动化学院,湖南,长沙,410073 |
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| 摘 要： | 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。
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| 关 键 词： | 航空重力测量 FIR低通数字滤波器 窗函数 重力异常提取 |
A COMPARISON OF DIGITAL LOWPASS FIR-FILTERS IN AIRBORNE GRAVIMETRY |
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| CAI Shao-kun,WU Mei-ping,ZHANG Kai-dong.A COMPARISON OF DIGITAL LOWPASS FIR-FILTERS IN AIRBORNE GRAVIMETRY[J].Geophysical and Geochemical Exploration,2010,34(1):74-78. |
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| Authors: | CAI Shao-kun WU Mei-ping ZHANG Kai-dong |
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| Institution: | Mechatronics and Automation College, National University of Defense Technology, Changsha410073, China |
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| Abstract: | 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 airbor... |
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| Keywords: | airborne gravimetry digital lowpass FIR-filter window function extraction of gravity anomaly |
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