| 航空重力测量中FIR低通滤波器的设计与应用 |
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| 引用本文： | 孙中苗.航空重力测量中FIR低通滤波器的设计与应用[J].测绘学院学报,1996(4). |
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| 作者姓名： | 孙中苗 |
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| 摘 要： | 航空重力测量数据含有许多噪声，需用高质量的数字滤波器加以平滑。有限冲激响应（ＦＩＲ）滤波器的优点是具有精确线性相位而且总是稳定的。本文利用契比雪夫逼近方法，设计了适用于航空重力测量的ＦＩＲ低通滤波器。为检测其性能，文中建立了一个模拟加速度模型。检测结果表明：滤波器性能可靠，适用于航空重力测量数据处理。
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| 关 键 词： | 航空重力测量，FIR低通滤波器，扰动加速度 |
Designs and Applications of Digital Lowpass FIR-Filter in Airborne Gravimetry |
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| Sun Zhongmiao.Designs and Applications of Digital Lowpass FIR-Filter in Airborne Gravimetry[J].Journal of Institute of Surveying and Mapping,1996(4). |
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| Authors: | Sun Zhongmiao |
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| Institution: | Sun Zhongmiao |
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| Abstract: | A high quality filter is necessary to smooth the airborne gravity data. For this purpose a Finite Impulse Response filter(FIR) is chosen. The FIR filter has the distinct advantages that it has linear phase characteristics and is always stable for numerical computations. In this paper a lowpass filter related to airborne gravity is designed by use of chebysher Approximation method. Finally. an acceleration model is given to test the reliability of this filter. The results indicated that the lowpass flter is suit for processing of airborne gravity data. |
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| Keywords: | Airborne gravinetry Digital lowpass FIR-filter Disturbing acceleration |
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