利用选权拟合法进行GPS水汽层析解算
Application of Fitting Method by Selection of the Parameter Weights on GPS Water Vapor Tomography
-
摘要: 附加约束条件的层析解算方法是克服GPS水汽层析观测方程不适定性的主要方法,为了避免该方法中水平约束方程权阵的选取不当对水汽层析结果产生的不良影响,将选权拟合法应用到对流层水汽参数反演中。首先利用水汽参数在空间的分布规律构建参数权矩阵,并利用L曲线法确定正则化参数,然后利用模拟实验对该方法在水汽层析解算中的应用进行了验证。结果表明,该方法可以有效地克服观测方程的不适定性,反演得到符合客观实际的结果。Abstract: Adding reasonable constraint conditions to the observation equation can be used to conquer the ill-posed problem in the GPS water vapor tomography.In order to conquer the problem caused by the improper use of the weight matrix of the constraint equations,we apply the fitting method by selection of the parameter weights(FMSPW) to the GPS water vapor tomography.In this method,the parameter weight matrix is constructed based on the property of water vapor in the troposphere,and a simulation experiment is made to validate the feasibility of this method in the GPS water vapor tomography.The results show that the FMSPW can be used to get the reasonable distribution of water vapor.
下载:
