摘要
介绍了Hopfield模型和分段模型两种常用的对流层折射率模型,以及在对流层折射误差修正中广泛应用的NMF(Neil Mapping Function)、VMF1(Vienna Mapping Function 1)和GMF(Global Mapping Function)3种映射函数。根据IGS(International GNSS Service)提供的2017年中国地区11个测站的数据,通过引入射线描迹法参与相关计算,分别对比研究2种折射率剖面模型和3种映射函数在对流层折射误差修正中的精度差异,并分析随高程和仰角变化的特点。研究结果表明,为对流层折射误差修正时的计算模型选取提供参考价值。
This paper introduces the two commonly used tropospheric refractivity models(the Hopfield model and Segmentation model)and three mapping functions(NMF,VMF1 and GMF),which are widely used in the correction of the tropospheric refraction error.Based on the data of 11 IGS stations of China in 2017,the accuracy difference between two refractivity models and three mapping functions in the correction of troposphere refraction error is compared by the ray-tracing method,and their variations with elevation angle and height are analyzed.The research results can provide certain reference values for the selection of computational models of tropospheric refraction error correction.
作者
乔江
陈国虎
卫佩佩
QIAO Jiang;CHEN Guohu;WEI Peipei(Information Engineering University,Zhengzhou 450001,China)
出处
《信息工程大学学报》
2019年第2期168-173,共6页
Journal of Information Engineering University
关键词
射线描迹法
对流层折射误差修正
对流层天顶延迟
折射率模型
映射函数
ray-tracing method
correction of the tropospheric refraction error
zenith tropospheric delay
refractivity model
mapping function
