顾及残差插值补偿的区域CORS对流层延迟建模研究
Research on Tropospheric Delay Modeling in Regional CORS Considering Residual Interpolation Compensation
欧书圆 1张卫星2
作者信息
- 1. 武汉大学测绘学院,湖北武汉,430079
- 2. 武汉大学卫星导航定位技术研究中心,湖北武汉,430079
- 折叠
摘要
针对基于GPS数据校正InSAR大气误差存在的空间插值问题,本文利用南加州SCIGN网观测数据对几种顾及地形因素的对流层延迟插值模型进行精度验证,并提出了利用模型残差的内插值来补偿模型自身误差的方法,同时对残差反距离插值中权重的幂值进行了研究,结果表明:H1QM1、H1QM3、EH1QX1、EH1QX3这4种模型精度为毫米级,实验中前3种模型使用反距离的1.5次方或2次方定权的残差插值补偿效果最佳,补偿精度为亚毫米级,EH1QX3模型起反向改正.
Abstract
In view of the spatial interpolation problem when using GPS data to correct the atmospheric error of InSAR,this paper uses the SCIGN network observation data of South-ern California to verify the accuracy of several troposphere de-lay interpolation models that take into account topographical factors,and the method of using the interpolation of the model residual to compensate the model's own error is put forward,At the same time,the power value of the weight in the residu-al inverse distance interpolation was studied. In the experi-ment,the residual interpolation compensation effect of the first three models is the best with setting the power of 1.5 or the power of 2. The compensation accuracy is of the sub-milli-meter level,and the EH1QX3 model is reversely corrected.
关键词
InSAR/大气误差/对流层延迟/残差插值Key words
InSAR/atmospheric error/tropospheric delay/residual interpolation引用本文复制引用
基金项目
测绘遥感信息工程国家重点实验室开放课题基金(17P01)
出版年
2024
NETL
NSTL
万方数据