基于CGPS数据的InSAR对流层延迟改正研究

Tropospheric delay correction to InSAR results using CGPS observations

利用CGPS数据和站间、历元间的双差模型来计算InSAR大气延迟改正量。通过新西兰GEONET站网CGPS数据,研究了多雨山区的InSAR对流层延迟内插模型及对流层延迟参数估计个数问题,实验表明IDW和Kriging内插模型都能较好的适用于多雨山区的InSAR对流层延迟改正量内插,每隔5分钟估计一个对流层参数是比较合理的。

InSAR atmospheric delay correction is calculated using CGPS data and between-site and between-epoch double difference model. Which interpolation model is most suitable to InSAR tropospheric delay correction and how many troposphere parameters should be determined is analyzed for rainy mountainous area with New Zealand＇ s GEONET CGPS data. It is suggested that either the IDW or the Kriging interpolation method be used to determine tropospheric delay parameters from GPS observations for rainy mountain areas. And estimating tropospheric delay parameters for 5-minute time intervals is reasonable.