多分辨率数据输入输出法确定大地水准面
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摘要
为从量化角度分析在采用输入输出法计算局部大地水准面中,输入数据(重力异常)的分辨率对计算结果的影响,以Moritz协方差函数模型估计功率谱密度函数,基于EGM2008模型重力异常计算了3种不同分辨率的输入数据下大地水准面高,仿真实验结果表明,随着分辨率的提升,将有更多的点能够参与拟合理论协方差函数模型系数,从而使得协方差函数模型在表征局部重力场特性上更加细化,大地水准面高的计算精度随分辨率的提升而提高。
The impacts of the resolution of input data(anomaly) on the calculation accuracy of geoid by using the input and output method is analyzed and quantified.The power spectral density function is constructed by the model of Moritz covariance function,geoids are determined by three different resolution input data which based on the EGM2008 model anomalies,and the result show that,with the enhancement of the resolution,there are more points to be able to participate in the coefficient fitting of the covariance function,so that the covariance function model is more refined in the characterization of the local gravity field,and the accuracy of geoid increases with the enhancement of the resolution.
The impacts of the resolution of input data(anomaly) on the calculation accuracy of geoid by using the input and output method is analyzed and quantified.The power spectral density function is constructed by the model of Moritz covariance function,geoids are determined by three different resolution input data which based on the EGM2008 model anomalies,and the result show that,with the enhancement of the resolution,there are more points to be able to participate in the coefficient fitting of the covariance function,so that the covariance function model is more refined in the characterization of the local gravity field,and the accuracy of geoid increases with the enhancement of the resolution.
引文
[1]翟振和,孙中苗.输入-输出系统理论在重力场扰动场元推估中的应用分析[J].海洋测绘,2009,29(5):8-10.
[2]Li Jinwen.Detailed Marine Gravity Field Determination by Combination of Heterogeoneous Data[D].Calgary:The University of Calgary,1996.
[3]Sideris M G,Forsberg R.Review of geoid prediction methods in mountainous regions[M].Determination of the Geoid.Springer New York,1991.
[4]Sideris M G.On the use of heterogeneous noisy data in spectral gravity field modeling methods[J].Journal of Geodesy,1996,70(8):470-479.
[5]WU Liming.Spectral methods for post processing airborne vector gravity data[D].Calgary:University of Calgary,1996.
[6]Tziavos I N,Sideris M G,Vergos G S,et al.An overview of spectral methods for the optimal processing of satellite altimetry and otherdatas[C]//Marine Geodesy,gravity-15years of processing in radar altimetry,Italy,2006.
[7]Schwarz K P,Sideris M G,Forsberg R.The use of FFTtechnique in physical geodesy.Geophysical Journal International[J].1990(100):485-514.
[8]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.
[9]黄甜,罗志才.应用双输入单输出法确定局部似大地水准面的实例研究[J].测绘地理信息,2009,34(2):28-29.
[10]Marple S L.Digital spectral analysis with applications[J].Journal of the Acoustical Society of America,1989,86(5):2034-2043.
[11]H·莫里斯.高等物理大地测量学[M].北京:测绘出版社,1984.
[12]翟振和.陆海交界区域多源重力数据的融合处理方法研究[D].郑州:解放军信息工程大学.
[13]章传银,郭春喜,陈俊勇,等.EGM2008地球重力场模型在中国大陆适用性分析[J].测绘学报,2009,38(4):283-289.
[14]翟振和,任红飞,孙中苗.重力异常阶方差模型的构建及在扰动场元频谱特征计算中的应用[J].测绘学报,2012,41(2):159-164.
[2]Li Jinwen.Detailed Marine Gravity Field Determination by Combination of Heterogeoneous Data[D].Calgary:The University of Calgary,1996.
[3]Sideris M G,Forsberg R.Review of geoid prediction methods in mountainous regions[M].Determination of the Geoid.Springer New York,1991.
[4]Sideris M G.On the use of heterogeneous noisy data in spectral gravity field modeling methods[J].Journal of Geodesy,1996,70(8):470-479.
[5]WU Liming.Spectral methods for post processing airborne vector gravity data[D].Calgary:University of Calgary,1996.
[6]Tziavos I N,Sideris M G,Vergos G S,et al.An overview of spectral methods for the optimal processing of satellite altimetry and otherdatas[C]//Marine Geodesy,gravity-15years of processing in radar altimetry,Italy,2006.
[7]Schwarz K P,Sideris M G,Forsberg R.The use of FFTtechnique in physical geodesy.Geophysical Journal International[J].1990(100):485-514.
[8]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.
[9]黄甜,罗志才.应用双输入单输出法确定局部似大地水准面的实例研究[J].测绘地理信息,2009,34(2):28-29.
[10]Marple S L.Digital spectral analysis with applications[J].Journal of the Acoustical Society of America,1989,86(5):2034-2043.
[11]H·莫里斯.高等物理大地测量学[M].北京:测绘出版社,1984.
[12]翟振和.陆海交界区域多源重力数据的融合处理方法研究[D].郑州:解放军信息工程大学.
[13]章传银,郭春喜,陈俊勇,等.EGM2008地球重力场模型在中国大陆适用性分析[J].测绘学报,2009,38(4):283-289.
[14]翟振和,任红飞,孙中苗.重力异常阶方差模型的构建及在扰动场元频谱特征计算中的应用[J].测绘学报,2012,41(2):159-164.