高精度的连续电离层延迟建模研究  

Study of High Precision and Continuous Ionosphere Model Determination

作　　者：范国清[1] 王威[1] 郗晓宁[1] 魏立栋[1] 

机构地区：[1]国防科学技术大学机电工程与自动化学院,长沙410073

出　　处：《空间科学学报》2009年第2期188-194,共7页Chinese Journal of Space Science

基　　金：国家自然科学基金项目资助(10072076)

摘　　要：在多项式电离层模型确定过程中,针对实测数据出现空白区域的问题,提出了以GIM数据作为背景场,联合实测数据进行多项式电离层模型确定的方法,分析了两种数据的权重,建立了相应的数学模型;另外对模型在时段间的连续性问题,提出了利用相邻两组系数进行时间加权计算电离层延迟的平滑方法;最后通过算例验证了建模和平滑方法的有效性.This paper presents a new idea to determine polynomial ionosphere model with the cireumstance that lacking of real observation data in special region. Besides real observation data, grid data calculated by global ionosphere model has been used as a background. The weight of two kinds of data has been discussed, and then mathematical model has been established. Secondly, the model continuity between two segments have been discussed, and then a smoothing method to calculate ionosphere delay has been studied, which uses two groups of time weighting neighbored model coefficients. Finally, the availability of the model was proved by mathematic experimentation.

关 键 词：VTEC GIM 权重 连续性 

分 类 号：P228.4[天文地球—大地测量学与测量工程]