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卫星测高大地水准面观测资料的二维经验功率谱密度估计
THE ESTIMATION OF TWO DIMENSIONAL EMPIRICAL POWER SPECTRAL DENSITIES OF ALTIMETER-DERIVED GEOID HEIGHT
【Author】 Chao Dingbo~(1)) Li Jinwen~(2)) Ning Jinsheng~(1)) Li Jiancheng~(1)) 1)(Wuhan Technical University of Surveying,Mapping,Wuhan,430079) 2)(The University of Calgary,Canada)
【机构】 武汉测绘科技大学; The University of Calgary,Canada;
【摘要】 在各类测量数据的实际处理过程中,往往用简单的平稳随机模型去描述测量误差。在具有二维覆盖的多次重复观测值的前提下,我们可以根据这些重复观测资料直接估算二维先验误差功率谱密度(或协方差),并进而分离出信号功率谱密度。本文导出了用于估算卫星测高大地水准面观测值的二维经验误差功率谱密度及信号功率谱密度的严密公式,并根据初步的实验对实际应用中的一些问题进行了讨论。
【Abstract】 In the processing of various measurement data,measuring error is usually described by stationary stochastic model.The two dimensional a priori error power spectrel density can be estimated directly if two dimensional covering multiple redundant measurements are available,thus,the signal power spectral density separated.The rigorous formulae for estimating two dimensional empirical error power spectral density and signal power spectral density of altimeter-derived geoid height are derived in the paper,and some problems of their practice applications are discussed tentatively.
【Key words】 Altimeter-derived geoid height; power spectral density estimation; measuring error;
- 【会议录名称】 寸丹集——庆贺刘光鼎院士工作50周年学术论文集
- 【会议时间】1998-12-01
- 【分类号】P223.0