航空矢量重力测量水平分量向下延拓的输入输出法
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摘要
研究航空矢量重力水平分量向下延拓的输入输出法,并以EGM2008计算的东向分量为例进行仿真实验,在不同的噪声水平下对比分析单输入单输出法和双输入单输出法的向下延拓效果。实验结果表明,当东向分量的精度为1.5mGal时,单输入单输出法和双输入单输出法均能实现稳定向下延拓;当东向分量的精度为6mGal时,单输入单输出法的延拓效果不可靠,而双输入单输出法能实现稳定向下延拓。
We discuss the downward continuation of the horizontal component in airborne vector gravimetry using input output system,and the east component is taken as an example for a simulation test.Under different noise levels,the continued results of single-input single-output systems and double-input single-output systems are compared.The results indicate that steady downward continuation of the high precision east component can be realized using both input methods,while that of the lower precision east component can only be achieved by double-input single-output system.
We discuss the downward continuation of the horizontal component in airborne vector gravimetry using input output system,and the east component is taken as an example for a simulation test.Under different noise levels,the continued results of single-input single-output systems and double-input single-output systems are compared.The results indicate that steady downward continuation of the high precision east component can be realized using both input methods,while that of the lower precision east component can only be achieved by double-input single-output system.
引文
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[3]Wu L M.Spectral Methods for Post Processing of Airborne Vector Gravity Data[D].Calgary:University of Calgary,1996
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[6]崔立鲁.频域输入输出法及其在大地水准面精化中的应用研究[D].武汉:武汉大学,2008(Cui Lilu.Frequency Domain Input and Output System Theory and Its Application in the Precise Determination of Geoid[D].Wuhan:Wuhan University,2008)
[7]周波阳,罗志才,许闯,等.航空重力数据向下延拓的FFT快速算法[J].大地测量与地球动力学,2013,33(1):64-68(Zhou Boyang,Luo Zhicai,Xu Chuang,et al.Comparison among Fast Fourier Transform Algorithms for Downward Continuation of Airborne Gravity Data[J].Journal of Geodesy and Geodynamics,2013,33(1):64-68)
[8]Hwang C,Hsiao Y S,Shih H C,et al.Geodetic and Geophysical Results from a Taiwan Airborne Gravity Survey:Data Reduction and Accuracy Assessment[J].Journal of Geophysical Research:Solid Earth,2007,112(B4)
[9]欧阳永忠,邓凯亮,黄谟涛,等.重力异常延拓计算积分半径的选取及远区效应[J].海洋测绘,2011,31(4):5-7(Ouyang Yongzhong,Deng Kailiang,Huang Motao,et al.The Choice of Integral Radius and It’s Far-Zone Effects in the Continuation of the Gravity Anomaly[J].Hydrographic Surveying and Charting,2011,31(4):5-7)
[2]Sideris M G.On the Use of Heterogeneous Noise Data in Spectral Gravity Field Modeling Methods[J].Journal of Geodesy,1996,70(8):470-479
[3]Wu L M.Spectral Methods for Post Processing of Airborne Vector Gravity Data[D].Calgary:University of Calgary,1996
[4]Tziavos I N,Sideris M G,Forsberg R.Combined Satellite Altimetry and Shipborne Gravimetry Data Processing[J].Marine Geodesy,1998,21(4):299-317
[5]宁津生,李金文,晁定波.各向异性局部重力场计算的谱方法[J].武汉测绘科技大学学报,1998,23(3):227-229(Ning Jinsheng,Li Jinwen,Chao Dingbo.The Spectral Methods for Computation of Non-Isotropic Local Gravity Field[J].Journal of Wuhan Technical University of Surveying and Mapping,1998,23(3):227-229)
[6]崔立鲁.频域输入输出法及其在大地水准面精化中的应用研究[D].武汉:武汉大学,2008(Cui Lilu.Frequency Domain Input and Output System Theory and Its Application in the Precise Determination of Geoid[D].Wuhan:Wuhan University,2008)
[7]周波阳,罗志才,许闯,等.航空重力数据向下延拓的FFT快速算法[J].大地测量与地球动力学,2013,33(1):64-68(Zhou Boyang,Luo Zhicai,Xu Chuang,et al.Comparison among Fast Fourier Transform Algorithms for Downward Continuation of Airborne Gravity Data[J].Journal of Geodesy and Geodynamics,2013,33(1):64-68)
[8]Hwang C,Hsiao Y S,Shih H C,et al.Geodetic and Geophysical Results from a Taiwan Airborne Gravity Survey:Data Reduction and Accuracy Assessment[J].Journal of Geophysical Research:Solid Earth,2007,112(B4)
[9]欧阳永忠,邓凯亮,黄谟涛,等.重力异常延拓计算积分半径的选取及远区效应[J].海洋测绘,2011,31(4):5-7(Ouyang Yongzhong,Deng Kailiang,Huang Motao,et al.The Choice of Integral Radius and It’s Far-Zone Effects in the Continuation of the Gravity Anomaly[J].Hydrographic Surveying and Charting,2011,31(4):5-7)