多分辨率数据输入输出法确定大地水准面  

Geoid Determination by Multiresolution Input-output Method

作　　者：汪振华[1] 李圆明[2] 徐玉成 WANG Zhenhua;LI Yuanming;XU Yucheng(Navy Press,Tianjin 300450,China;Dalian Naval Academy Training Ships Detachment,Dalian 116018,China;Liaoning Pelagic Fisheries,Co.Ltd,Dalian 116113,China)

机构地区：[1]海军出版社,天津300450 [2]海军大连舰艇学院训练舰支队,辽宁大连116018 [3]辽宁远洋渔业有限公司,辽宁大连116113

出　　处：《海洋测绘》2019年第1期75-78,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41474012;41374018);国家973计划(613219);国家重点研发计划(2016YFC0303007;2016YFB0501704)

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.

关 键 词：大地水准面 重力异常 输入输出法 功率谱密度函数 EGM2008 

分 类 号：P229.23[天文地球—大地测量学与测量工程]